Generator Room Ventilation Design — Practical HVAC Engineering Guide Generator room ventilation is essential for reliable diesel generator operation. The ventilation system must remove heat from the engine, alternator, exhaust piping, radiator, and other heat-producing components while providing the air needed for engine combustion and maintaining an acceptable room temperature. For hospitals and other critical facilities, inadequate ventilation can cause generator overheating, reduced output, nuisance shutdowns, alternator overheating, and unreliable emergency power during a utility failure. The key principle: Generator-room ventilation airflow, engine combustion air, and radiator cooling airflow are related but distinct requirements. They must be coordinated without double-counting airflow or exceeding the generator manufacturer's allowable inlet restrictions. 1. What are the main ventilation requirements? 10 1. Heat-removal ventilation Removes heat released into the room by th...
5 Common Causes of High HVAC Energy Consumption — Detailed Engineering Guide High HVAC energy consumption does not always mean the chiller, AHU, or other equipment is inefficient. Often, the real causes are poor heat transfer, incorrect control settings, inadequate water flow, air-distribution problems, and ineffective preventive maintenance. For Facility Management professionals, the objective is to identify the root cause, restore system performance, and reduce energy consumption without compromising indoor comfort, humidity control, or critical hospital operations. 1. Dirty air filters and cooling coils 6 Why energy consumption increases Dirty filters restrict airflow through the AHU. Dirty cooling coils reduce heat transfer between the air and chilled water or refrigerant. This can lead to: Increased fan pressure requirements and potentially higher fan power. Reduced cooling capacity and insufficient airflow. Longer equipment operating hours to maintain set points. Poor humidi...