Experimental Investigation on Refrigeration Dehumidification System with Membrane-base Total Heat Recovery

摘要

An independent air dehumidification system is benefit to improve IAQ and decreased energy consumption by HVAC. Refrigeration dehumidification system with membrane-based total heat recover is the key equipments to realize this goal. The system comprise of two subsystems: membrane total heat recover and refrigeration dehumidifier. The total heat exchanger has a membrane core where the incoming fresh air exchanges moisture and temperature simultaneously with the exhaust air. In this manner, the total heat or enthalpy from the exhaust air is recovered. Then the fresh air flows through a cooling coil where it is dehumidified below the dew point. Finally, the code and dry air are supplied to indoor. A prototype is built in laboratory. Experiments are conducted under variable operating conditions in the enthalpy laboratory. The effects of varying operating conditions like temperature, and air humidity on the air dehumidification rates and thermal coefficient of performance are evaluated with indoor air dry bulb 27 °C and wet bulb 19 °C。Comparison with conventional mechanical dehumidification systems, the COP and air dehumidification rates of the proposed system increase 2.3 times, 3 times, respectively. The performance of the proposed dehumidification system is rather robust to under hot and humid environment.