Is it permissible to combine the air compressor room and the chiller room?

Basic Principles for the Combined Use of the Air Compressor Room and the Chiller Room

In industrial plant and HVAC design, whether the air compressor room and the chiller room can be combined is a common question. From the perspectives of engineering practice and safety codes,In principle, it is not recommended to co‑locate the two in the same physical space.These two types of equipment differ significantly in their operating environment requirements, heat generation, and potential safety risks. If space constraints necessitate their shared use, a rigorous safety assessment must be conducted, and special isolation measures must be implemented.

The main conflicts and risks associated with joint use

• Heat and ventilation conflict:During operation, air compressors generate substantial heat and require an adequate ventilation and cooling environment; similarly, refrigeration rooms also need effective heat dissipation and have specific requirements for ambient temperature. Combining these two systems can lead to a cumulative thermal load within the room, placing additional strain on the ventilation and cooling infrastructure.
• Safety and explosion-proof requirements differ:Some refrigeration systems are toxic and flammable/explosive, requiring strict explosion-proof and pressure-relief measures in their control rooms; meanwhile, air compressors may pose a risk of oil‑gas leakage. The combination of these two can increase the potential for fire or explosion.
• Superposition of Noise and Vibration:Both air compressors and refrigeration compressors are high-noise, high-vibration equipment. Co‑locating them can not only cause noise levels in the machine room to exceed regulatory limits, shortening equipment life, but may also transmit vibrations through the building structure, affecting surrounding areas.

Restrictions imposed by relevant design codes

When designing equipment rooms, it is imperative to strictly adhere to the relevant national engineering design codes. The design code for compressed air stations sets forth clear requirements for ventilation, fire protection, and sound insulation in compressor rooms, while the codes governing refrigeration rooms impose stringent stipulations regarding the independent placement of such rooms, emergency exhaust systems, and electrical explosion‑proofing. In general, these codes mandate that equipment rooms with differing fire hazards or environmental requirements be located separately or fully segregated by firewalls.

If concomitant use is necessary, the corresponding measures are as follows:

If constrained by the building’s spatial limitations and it is necessary to locate both types of equipment rooms within the same structure, the following stringent engineering measures shall be implemented:

• Physical isolation:Use firewalls with a fire-resistance rating that complies with relevant codes to completely separate the two areas, creating two independent rooms; sharing the same space is strictly prohibited.
• Independent ventilation system:Independent supply and exhaust ventilation systems are designed for the air compressor room and the chiller room, respectively, to prevent airflow cross-contamination and ensure the efficient removal of heat and waste gases from each space.
• Electrical and Safety Monitoring:Based on the properties of the refrigerant, equip the refrigeration room with explosion-proof electrical equipment of the appropriate classification, and install gas leak detection alarms and an emergency ventilation interlock system.

Summary and Recommendations

Combining the air compressor room and the chiller room presents numerous technical challenges and may easily violate relevant safety design codes. During the early stages of project planning, it is advisable to locate these two spaces separately and independently whenever possible. If they must be co‑located within the same building, it is essential to consult with qualified HVAC and fire‑protection engineers to ensure that the design complies with applicable regulations and safeguards operational safety.