1.What is aerospace clean room
An aerospace cleanroom is a specially designed and controlled environment for the research, development, production, assembly, and testing of aerospace products. Its construction and operational methods are aimed at minimizing the ingress, generation, and retention of particles within the room. Environmental factors such as temperature, humidity, cleanliness, vibration, pressure, airflow velocity, and static electricity that may affect production are controlled within a specific design range. This type of room ensures the safety, stability, and reliability of aerospace precision instruments and components during manufacturing.
2.Common Application Areas of Aerospace Clean Rooms
Aerospace cleanrooms are used in various production and processing fields for aerospace instruments and components, such as:
Production of Core Spacecraft Components: Assembly and testing of satellite solar panels, optical sensors, and onboard computer chips.
Rocket Engine Manufacturing: Precision machining and assembly of components like turbine blades and fuel injectors for liquid rocket engines.
Manned Space Equipment Development: Testing and debugging of astronauts' space suits and life support systems.
Key Aircraft Engine Components: Coating treatment and inspection of high-precision parts such as turbine discs and blades for aircraft engines.
3.Why Are Cleanrooms Critical for Aerospace Production?
Aerospace products are extremely valuable, operate in harsh orbital or flight environments, face extreme working conditions, and are difficult to repair. Therefore, they demand exceptionally high precision, reliability, and durability. Even the slightest contamination during production can cause failures. Cleanrooms provide the essential controlled environment for aerospace manufacturing, with their importance reflected in the following aspects:
Preventing High-Precision Component Failures: Aerospace core components require micron or even nanometer-level precision. Tiny dust particles adhering to or entering these parts can directly cause malfunctions. High-grade cleanrooms effectively control airborne particulate levels, avoiding contamination during production.
Ensuring Stability of Electronic Components: Electronic devices such as onboard computers, sensors, and guidance systems in spacecraft and rockets are highly sensitive to static electricity, dust, temperature, and humidity. Cleanrooms strictly regulate these parameters to ensure product stability and reliability.
Adaptability to Extreme Environments: Aerospace vehicles operate in extreme space conditions, such as sudden temperature changes and strong radiation, with almost no possibility of repair or replacement. Thus, production must fully control contamination and potential risks throughout the process. Cleanrooms offer a clean, safe, and stable production environment.
Safety and Quality Assurance: Cleanroom materials, such as anti-static and corrosion-resistant surfaces, prevent microbial contamination, chemical corrosion, and electrostatic adsorption. This protects experimental data accuracy, personnel safety, and extends facility lifespan.
4.What Cleanliness Levels, Classifications, and Standards Apply to Aerospace Manufacturing Cleanrooms?
The required cleanliness levels for aerospace manufacturing cleanrooms depend on the specific production processes. According to the ISO 14644-1 standard, aerospace cleanrooms typically range from ISO Class 5 to ISO Class 7, with some high-precision assembly or special environments requiring stricter standards.
Core Precision Component Assembly and Inspection: Processes such as assembly and calibration of satellite optical lenses, infrared detectors, laser rangefinders, gyroscopes for attitude control, and high-precision sensor assembly require ISO Class 5 or higher (e.g., ISO Class 4) cleanrooms.
Production of Key Electronic and Mechanical Components: Soldering and testing of onboard computer chips and printed circuit boards (PCBs), precision machining and assembly of rocket engine fuel injectors and turbine blades typically require ISO Class 5 or ISO Class 6 cleanrooms.
Non-Core Component Production and Auxiliary Workshops: Areas such as aircraft shell processing, metal part polishing, and cleanroom auxiliary rooms generally require ISO Class 7 cleanrooms.
5. What Factors Must Be Considered in Designing Aerospace Manufacturing Cleanrooms?
Due to the high precision, stability requirements, and extreme operating conditions of aerospace equipment, their production environments must meet exceptionally high standards. Key design considerations include:
1)Appropriate Cleanliness Levels and Airflow Organization: Determine cleanliness levels for each area based on process requirements. ISO Class 5 and higher areas should use unidirectional (laminar) airflow with a face velocity of 0.2–0.5 m/s. ISO Class 6–7 areas may use turbulent or mixed airflow with top-supply, bottom-return or side-return airflow patterns. Air change rates should comply with ISO 14644-1 requirements.
2)Temperature, Humidity, and Pressure Differential Control: Aerospace precision components are sensitive to temperature and humidity fluctuations. To avoid material performance impacts, temperature should be controlled within ±0.5°C (preferably not exceeding ±1°C), and humidity within ±3% RH (preferably not exceeding ±5% RH). Pressure differentials should be maintained at ≥10 Pa relative to the outside and ≥5 Pa between different cleanliness zones to prevent contamination.
3)Enclosure Structure and Material Selection: Cleanroom materials (walls, ceilings, floors) should be low-particulate, easy to clean, antimicrobial, corrosion-resistant, and anti-static. Doors and windows should be airtight, using materials like stainless steel or aluminum alloy, with double-pane vacuum glass to prevent dust ingress and temperature fluctuations.
4)Personnel and Material Flow Design: Separate pathways for personnel and materials should be planned to avoid cross-contamination. Personnel should pass through gowning rooms, air showers, and hand sanitation stations. Materials should enter via material airlocks or pass-throughs, separate from personnel pathways.
5)Static Electricity and Vibration Control: To protect sensitive components (e.g., onboard computers, sensors) from electrostatic discharge (ESD), cleanrooms should use anti-static flooring (grounding resistance ≤1 Ω), anti-static wall and ceiling panels, ionizers, and ESD-safe garments and footwear. Vibration-sensitive equipment (e.g., gyroscope calibration) may require vibration-isolated foundations or platforms.
6)Special Industry Requirements: Large components (e.g., rocket engines, satellite modules) may require wide-span cleanrooms with lifting equipment, demanding high structural strength and sealing. If handling fuels or volatile solvents, explosion-proof ventilation and electrical systems are necessary to maintain safe vapor concentrations.
6. How Can Long-Term Operational Costs of Cleanrooms Be Reduced Through Proper Planning?
Due to their high requirements and cleanliness levels, aerospace cleanrooms incur significant long-term operational costs. To reduce these costs and achieve energy efficiency, planning should focus on the following areas:
1)Rational Planning of Cleanliness Grades for Different Areas: Determine the cleanliness grades for each area based on the specific process requirements of aerospace equipment production. Minimize the area of high-cleanliness zones as much as possible while meeting process requirements (e.g., placing non-core components and auxiliary processes in lower-grade areas). This can significantly reduce initial investment and operational costs for the cleanroom. Additionally, adopting a modular design for the workshop and reserving partition interfaces allows for quick adjustment of the area for each cleanliness grade when production tasks change, avoiding idle waste caused by a fixed layout.
2)Implementing Refined Operation and Maintenance Management: A cleanroom's performance relies on three parts construction and seven parts maintenance. Scientific, reasonable, and refined operation and maintenance management can significantly lower operational costs. First, optimize personnel and material workflows within the cleanroom. Simplify material entry and exit paths (prioritize batch transfers), reduce the frequency of opening material airlocks/pass-throughs, and minimize energy consumption. Set reasonable air shower durations for personnel entry/exit and appropriate frequencies for cleaning cleanroom garments to avoid unnecessary cost increases. Second, implement scientific management of consumables like filters. A system with three-stage filtration, where pre-filters and intermediate filters are regularly cleaned and replaced, can effectively extend the service life of terminal HEPA/ULPA filters. Real-time monitoring of the pressure drop across terminal HEPA filters (and deciding replacement based on this data) ensures cleanroom requirements are met while preventing the premature replacement of still-usable filters, thereby saving on filter costs. Finally, regularly calibrate and maintain HVAC equipment, fans, sensors, etc., to avoid high energy consumption and operational costs caused by equipment malfunctions.
3)System and Equipment Selection: For aerospace cleanroom air conditioning and purification equipment, select high-efficiency, energy-saving units, variable-frequency fans, and devices with efficient heat recovery. Fans can adjust their speed in real-time based on indoor pressure differentials and cleanliness levels. Workshop exhaust air can be used to preheat fresh air via heat recovery, reducing the cooling/heating energy consumption of the air conditioning system, potentially saving 20%–30% of HVAC energy consumption. Implement zoned temperature and humidity control for different workshop areas according to process requirements. Temperature and humidity precision requirements can be appropriately relaxed in non-core areas (e.g., maintaining high precision of ±0.5/1°C, ±3/5% RH in core areas, while relaxing to ±2°C, ±10% RH in auxiliary areas). Automatically switch to an "energy-saving mode" during non-production periods (reducing supply air velocity while maintaining basic pressure and cleanliness requirements in the workshop), which can effectively reduce the energy consumption and operational costs of the HVAC system.
4)Process and Technological Innovation: To reduce the operational costs of aerospace cleanrooms, the production equipment and processes themselves must also continuously innovate. Prioritize the use of automated equipment to reduce labor costs and the energy consumption associated with frequent personnel movement in and out of the cleanroom. Simultaneously, deploy an Internet of Things (IoT) system within the cleanroom to monitor cleanliness, temperature, humidity, and energy consumption data in real-time for each area. Use big data analytics to optimize operational parameters, achieving "precision pollution control and on-demand energy consumption."
7. Air Filtration and Environmental Control Systems
The air filtration system and environmental control system are the core components that ensure the ultra-high cleanliness and stable environmental parameters of an aerospace cleanroom. They work in synergy to guarantee that the production environment meets the stringent manufacturing requirements for high-precision aerospace components. The specific designs and functions are as follows:
Air Filtration System:
Aerospace cleanrooms employ a "Pre-filter → Medium-filter → High-Efficiency/Ultra-Low Penetration Air (HEPA/ULPA)" three-stage filtration system. Each stage has a specific function. Pre-filters, typically panel-type, are installed at the fresh air intake and primarily filter large particulate matter ≥5μm, protecting the downstream medium and high-efficiency filters from clogging and extending their service life. Medium-filters, typically bag-type, are installed within the Air Handling Unit (AHU) and primarily filter medium particulate matter 1-5μm, further removing airborne suspended particles and reducing the load on the terminal filters. HEPA/ULPA filtration is the core filtering stage, positioned at the final point of air delivery into the cleanroom to filter 0.1-1μm ultrafine particles. ISO Class 5-7 areas may utilize HEPA filters, while areas cleaner than ISO Class 5 (e.g., ISO Class 4 and above) must use ULPA filters.
Environmental Control System:
Aerospace cleanrooms perform environmental control primarily in the following aspects to meet production process requirements:
Precise Temperature and Humidity Control: Based on the HVAC zoning and specific temperature/humidity requirements of the workshop, the AHU is equipped with various functional sections such as a cooling coil (for refrigeration), heaters, humidifiers, and filters. Using sensor feedback in real-time, the system automatically adjusts cooling, heating, humidification, and dehumidification outputs to maintain temperature and humidity within the designed range for each zone.
Airflow and Pressure Differential Control:
The cleanroom workshop selects appropriate airflow patterns based on cleanliness class (e.g., unidirectional/laminar airflow for ISO Class 5 and above, and non-unidirectional/turbulent or mixed airflow with top-supply, bottom-return or side-return for ISO Class 6-7). Simultaneously, the cleanroom as a whole must maintain a positive pressure relative to the outside environment (≥10 Pa). A pressure differential gradient must be established between areas of different cleanliness classes (higher class areas must maintain a pressure ≥5 Pa relative to adjacent lower class areas) to prevent infiltration of untreated external air and environmental contamination.
Static Electricity and Vibration Prevention and Control:
The cleanroom floor utilizes anti-static flooring with proper external grounding (grounding resistance ≤1 Ω). Walls and ceilings use anti-static color steel panels. Additionally, ionizing fans, static eliminators, etc., can be deployed within the workshop. Personnel wear anti-static coverall cleanroom garments and conductive shoes to prevent electrostatic effects on products. Furthermore, some precision instruments (e.g., for gyroscope calibration) have extremely high requirements for workshop vibration levels. To avoid adverse effects from external vibrations on equipment, the workshop must implement vibration isolation measures such as isolated foundations and vibration isolation platforms for precision equipment.
Intelligent Monitoring System:
An Internet of Things (IoT) system is deployed in the cleanroom to monitor cleanliness, temperature, humidity, and energy consumption data for all areas in real-time. The system triggers automatic alarms for abnormal data. An Uninterruptible Power Supply (UPS) can be configured to ensure the filtration and environmental control systems continue operating during a power outage, preventing loss of control over the cleanroom environment.
8. How to Reduce Cleanroom Energy Consumption?
To reduce the energy consumption of aerospace cleanrooms, the primary focus should be on the following areas:
（1)Optimize and Retrofit HVAC and Air Handling Systems: The constant-speed fans in air purification supply units can be replaced with variable-frequency drive (VFD) fans. Coupled with real-time online cleanroom particle monitoring and room differential pressure sensors, the workshop's air supply volume can be dynamically adjusted based on real-time cleanliness and pressure differential readings, saving fan energy. Heat recovery units can be added to workshop exhaust systems or process compressed air systems. The recovered heat can be used to preheat fresh air, for air conditioning reheat, etc., reducing the heating load on the HVAC units. This can decrease HVAC energy consumption by 15%–25%. Filters can also be replaced with low-resistance, high-efficiency models to reduce air resistance and lower the required fan operating power.
（2)Implement Zoned, Precise Control of Temperature, Humidity, and Pressure Differentials to Avoid Inefficient Energy Use: Establish different cleanliness, temperature, and humidity requirements for zones based on their specific process needs (e.g., core equipment areas, non-core component production areas, auxiliary process areas). Control these parameters independently for each zone. Appropriately relax the precision requirements for temperature and humidity in non-core areas (e.g., maintain high precision of ±0.5/1°C, ±3/5% RH in core areas, while relaxing to ±2°C, ±10% RH in auxiliary areas). Automatically switch to an "Energy Saving Mode" during non-production hours (reducing supply air velocity while maintaining basic room pressure and cleanliness requirements). This effectively reduces the energy consumption and operating costs of the HVAC system. The pressure differential between different cleanliness classes only needs to be maintained at ≥5 Pa; there is no need to increase it arbitrarily (fan energy consumption increases by approximately 8% for every 5 Pa increase in pressure differential). Use air volume control dampers to precisely manage the supply and return air ratios for each zone, preventing energy loss due to excessively high pressure differentials.
（3)Optimize Enclosing Structures and Personnel/Material Flows: Select color steel panels with high thermal insulation performance for cleanroom walls and ceilings, and use double-pane vacuum glass for windows. This reduces heat transfer between indoors and outdoors, lowering energy loss. Simplify the paths for materials entering and exiting the cleanroom (prioritize consolidated batch transfers), reduce the frequency of opening material airlocks/pass-throughs, and decrease cleanroom energy consumption.
（4)Introduce Intelligent Monitoring and Energy-Saving Technologies: Deploy an Internet of Things (IoT) system in the cleanroom. Use sensors to collect real-time data on cleanliness, temperature, humidity, pressure differentials, and energy consumption for all areas. Establish energy consumption models and utilize big data analytics to optimize operational parameters, achieving "precision pollution control and on-demand energy consumption."
9. How to Select Suitable Materials for Aerospace Cleanrooms? What Characteristics Do the Materials Need to Possess?
For aerospace cleanroom materials, the core principle is "low particulate generation, non-particle retaining, easy to clean, antimicrobial, anti-static, stable, and reliable". All materials must be suitable for ultra-high cleanliness, multi-parameter precise control environments, while also meeting the special requirements of aerospace component production.
The primary material characteristic requirements are:
Low Particulate Generation: The material itself must not generate particles, fibers, or volatile organic compounds (VOCs), preventing it from becoming a contamination source within the cleanroom.
Anti-static Properties: Materials must possess stable electrostatic discharge (ESD) protection capabilities, with a surface resistivity ideally controlled within the range of 106 to 109 Ω.
Ease of Cleaning and Corrosion Resistance: Surfaces should be smooth and even, able to withstand repeated wiping with water, alcohol, or neutral cleaning agents without leaving residues in hard-to-clean areas. They must resist corrosion from disinfectants (especially important in manned aerospace cleanrooms requiring regular disinfection) and not yellow or degrade with long-term use.
Stability: Materials must not shrink, deform, or release harmful substances under the constant temperature and humidity conditions of a cleanroom. They should also withstand physical stresses such as equipment vibration and personnel traffic, ensuring a long service life.
Materials mainly suitable for aerospace cleanrooms include:
Walls/Ceilings: Sandwich color steel panels (rock wool or glass magnesium board core), electro-galvanized steel panels. These are low-particulate generating, easy to clean, and provide sound insulation and thermal insulation.
Floors: Anti-static epoxy floors, PVC anti-static flooring, etc., with a surface resistivity of 106 to 109 Ω. They are wear-resistant, chemically resistant, easy to clean, and low-particulate generating.
Doors/Windows: Aluminum alloy/stainless steel door/window frames with double-glazed tempered vacuum glass, airtight cleanroom doors. These provide thermal insulation, prevent condensation, are low-particulate generating, corrosion-resistant, and are fitted with sealing strips at door gaps to ensure airtightness.
10. What are the Commonly Used Cleanroom Equipment in Aerospace Assembly?
The cleanroom equipment used in aerospace cleanrooms has the core functions of maintaining a stable cleanroom environment, eliminating pollutant interference, ensuring high-precision assembly operations, and meeting the "high precision, high reliability" assembly standards for aerospace components. Commonly used cleanroom equipment includes:
Air Showers / Material Air Showers / Pass-Through Air Showers: These are passages for personnel and materials entering/exiting the cleanroom. They use high-velocity clean airflow to blow away particles attached to the surfaces of personnel or materials, preventing contaminants from being introduced into the core clean area. A double-door interlock design prevents direct airflow exchange between the cleanroom and the external environment.
Clean Laminar Flow Hoods / Clean Benches: These create a localized vertical or horizontal unidirectional laminar airflow, providing an operating environment with a higher cleanliness classification than the general cleanroom area. This prevents particle settlement onto component surfaces during assembly.
High-Efficiency Particulate Air (HEPA) / Ultra-Low Penetration Air (ULPA) Filters (Supply Air Outlets): These are the core filtering components of the purification system. They intercept ultrafine particles in the air ≥0.1 µm in size, achieving the cleanliness grade required by the process.
Cleanroom Auxiliary Equipment: This includes ionizing fans for static elimination, clean garment storage cabinets, shoe sole cleaning machines, cleanroom cranes, etc.
11. Pollution Control Strategies for Aerospace Manufacturing Cleanrooms
To achieve effective pollution control, aerospace cleanrooms must implement control measures starting from the source of contamination and encompassing the entire process management, ensuring all production areas meet process requirements.
Source Control of Contamination:
The primary sources of contaminants are personnel, materials, equipment, and the processes themselves. Controlling these sources can fundamentally reduce contaminant generation.
Personnel Contamination Control:
Personnel entering the cleanroom must wear full-body cleanroom garments, anti-static shoe covers, masks, and gloves. Garment materials should be low-linting, such as polyester or polyamide, and require regular cleaning and sterilization. Wearing jewelry and cosmetics is prohibited. Entry follows a strict sequence: gowning, hand washing/disinfection, and air showering. Inside the cleanroom, personnel must adhere to behavioral protocols: no running, avoiding large/sudden movements (to reduce airflow disturbance and particle suspension), no eating or drinking, and no direct hand contact with precision components.
Material and Equipment Control:
Materials (parts, tools, packaging) entering the cleanroom must undergo procedures including unpacking, cleaning, disinfection, and air showering in a material airlock. Packaging materials used inside the cleanroom must be low-linting, anti-static laminated bags; paper or cotton packaging is prohibited. Equipment surfaces entering the cleanroom should be treated to be anti-static and smooth. Components prone to generating particles, such as motors and bearings, must be sealed to prevent lubricant leakage or particle release. Large equipment must pass through a material airlock for air showering before entry, and installation should avoid dust-generating operations like cutting or grinding.
Process Contamination Control:
Areas where processes generate dust should be equipped with local exhaust systems to promptly remove pollutants like smoke and aerosols. Adhesives and coatings used should be low-VOC, low-particle-generating types, and curing processes should be completed within independent clean enclosures.
In-Process Contamination Control:
Pollution control measures during cleanroom production primarily include the purification and filtration system, daily cleaning and maintenance, and process management and monitoring.
Purification and Filtration System:
The cleanroom strictly implements a three-stage filtration system: pre-filter, intermediate-filter, and HEPA/ULPA filter. Terminal filters are installed directly in the cleanroom ceiling or within laminar flow hoods to ensure supplied air meets the required cleanliness class.
Daily Cleaning and Maintenance:
Cleanroom partition walls, ceilings, and floors must be wiped daily using purified water and lint-free wipes. Surfaces of core precision components and equipment should be wiped with specialized lint-free wipes or lens tissue. Consistent daily cleaning and maintenance is essential.
Process Management and Monitoring:
Establish clear operating procedures for personnel and materials within the cleanroom. Regularly train and assess operators. Deploy equipment such as particle counters, temperature and humidity sensors, and differential pressure sensors throughout the facility for 24/7 online monitoring of key parameters. The system should trigger automatic alarms and actions (e.g., fan speed adjustment, filter replacement alerts) when particle concentration or pressure differentials exceed limits. Implement a contamination event traceability mechanism to analyze root causes and optimize control strategies. Regularly evaluate the effectiveness of pollution control measures to continuously reduce contamination risks.
12. Why Are Modular Cleanrooms More Suitable for Building Aerospace Laboratories?
Modular cleanrooms are more suitable for aerospace laboratories because they perfectly align with the aerospace sector's demands for "high precision, high reliability, rapid iteration, and flexible adaptation." Compared to traditional fixed-built cleanrooms, they offer significant advantages in technical adaptability, construction efficiency, cost control, and functional scalability.
Rapid Deployment and Flexible Reconfiguration:
All components of a modular cleanroom (modular wall panels, fan filter units, air showers, etc.) are prefabricated in a factory. On-site work involves only assembly, eliminating cutting, welding, and similar processing. This reduces the total construction timeline by approximately 45% compared to traditional builds, enabling a rapid response to urgent R&D needs of space missions. The structure uses connector-based joining with pre-planned expansion interfaces, allowing for quick disassembly, relocation, expansion, or upgrades. This suits the rapidly iterating process needs of aerospace labs, avoiding the resource waste associated with "demolish and rebuild" approaches of traditional cleanrooms.
High Precision and Reliability:
Aerospace labs have extremely high environmental requirements. Modular cleanroom wall panels, filter installations, and sealing are all completed in the factory's controlled environment. Standardized sealing techniques at joints avoid the dust contamination and potential sealing inconsistencies common in traditional on-site construction. Units can achieve their target cleanliness class upon delivery, significantly reducing on-site commissioning difficulty. Standardized factory production ensures lower risk from design through to operation and maintenance, meeting the aerospace industry's stringent reliability requirements for both equipment and environment.
Controllable Costs:
The factory-prefabrication model of modular cleanrooms reduces on-site labor, material, and time costs, leading to a 20%–30% lower initial investment compared to traditional cleanrooms. Furthermore, the modular design features highly interchangeable parts, resulting in lower replacement and maintenance costs. When needs change, disassembling and reconfiguring modules requires no additional civil engineering work, drastically reducing the cost of secondary renovations. This is particularly well-suited for the "multi-mission, small-batch" R&D model common in aerospace labs.
Strong Compliance:
The modular design allows for controlled parameters and traceable processes. All performance indicators (cleanliness, pressure differential, temperature, humidity, etc.) can be precisely quantified, facilitating strict adherence to industry standards (e.g., ISO 14644, aerospace clean environment specifications) and enabling faster third-party testing and certification.
13. How Do Modular Cleanrooms Reduce Project Timelines?
The core reason modular cleanrooms can significantly shorten the construction timeline for aerospace cleanroom projects, compared to traditional ones, lies in shifting from a traditional "on-site construction-focused" model to a "factory prefabrication + on-site rapid assembly" concurrent workflow. This compresses the entire project timeline through process front-loading, standardized assembly, and simplified commissioning.
Preparatory & Design Phase:
Based on the client's production process requirements, the floor plan is confirmed. Modular cleanrooms utilize standardized modules for components (e.g., wall panels, FFUs, cleanroom equipment), eliminating the need for project-specific structural calculations and detailed design from scratch. This greatly saves design time, potentially shortening the design cycle by around 50% compared to traditional cleanrooms.
Production Phase:
All components of the modular cleanroom undergo standardized, batch production and processing in the factory. Before leaving the factory, core performance tests (cleanliness, sealing, pressure stability) are completed, ensuring they meet specifications upon delivery. This avoids the rework often required in traditional projects due to on-site construction defects.
On-site Construction Phase:
On-site, the modular cleanroom requires only the rapid assembly of standardized connectors according to assembly drawings. This avoids the on-site cutting, welding, and the sequential workflow of traditional construction ("civil work -> structure -> MEP installation -> electrical wiring -> filter installation -> sealing"), dramatically shortening the on-site construction period. The combined factory production and on-site assembly model can reduce the total construction timeline by over 45% compared to traditional methods.
Commissioning & Acceptance Phase:
As modular cleanroom components are pre-commissioned at the factory, on-site work involves only system integration tests (e.g., zonal pressure balance, coordinated temperature/humidity control) rather than full parameter re-commissioning. This slashes the commissioning period from the traditional 2–4 weeks down to 3–5 days, significantly saving total project time.
14. Modular Aerospace Cleanroom: HardWall vs. Color Steel Panel Walls
In the context of modular aerospace cleanrooms, "HardWall" primarily refers to modular profile frameworks (aluminum alloy/stainless steel) paired with rigid wall panels (sandwich panels, tempered glass, etc.). Compared side-by-side with traditional color steel panel walls, they show significant differences in suitability, performance, and cost, with the main distinctions as follows:
| Comparison Item | Modular HardWall | Color Steel Panel |
| Material Characteristics | Factory-prefabricated,low particulate generation,excellent sealing, resistant to micro-vibrations, suitable for ultra-high-cleanliness area requirements | Smooth surface, easy to clean; sealing of panel joints relies on on-site application, suitable for general cleanliness area requirements. |
| Structural Strength | The modular profile framework offers high rigidity, impact/deformation resistance, suitable for environments requiring micro-vibration resistance and high positive pressure. | Core material determines strength (rock wool/glass magnesium cores offer good strength), but overall impact resistance is weak, prone to denting and deformation. |
| Thermal Insulation & Sealing | Sealing performance is durable, thermal conductivity coefficient is stable, suitable for precision constant temperature and humidity environments. | Good thermal insulation, but improperly applied on-site sealing can age quickly, leading to a shorter effective seal life. |
| Anti-Static / Corrosion Resistance | Profile anti-static performance is stable, resistant to corrosion from aerospace chemicals. | Anti-static coating has a limited lifespan; if damaged, it becomes prone to dust accumulation and corrosion. Stainless steel surface material is a better choice. |
| Construction Cost | Higher initial investment than color steel panels (approximately 1.5 times the cost of color steel panels), but offers a long service life and lower maintenance costs. | Lower initial investment (approximately 2/3 the cost of Modular HardWall), but has a shorter service life, is more susceptible to damage, and requires replacement. |
| Flexibility & Reconfigurability | Modular design allows for disassembly and reuse, facilitating relocation, expansion, upgrades, and modifications. | On-site fabricated and installed; essentially non-reusable after removal. |
In summary, Modular HardWall cleanrooms are better suited for ultra-high cleanliness, high-reliability, and long-lifespan scenarios, aligning with aerospace needs and making them ideal for core mission areas. Color steel panels offer greater advantages in cost-sensitive or temporary mission scenarios. The two can be flexibly combined to balance performance and cost.
