An independent air dehumidification system is helpful for improving the indoor air quality.Refrigeration dehumidification system with membrane-based total heat recover is the key equipment to realize this goal.The system comprises 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 air flow rates

temperature

and air relative humidity on the air dehumidification rates

cooling capacities

electric power of compressor and COP are investigated under indoor temperature 27℃ and bulk wet-bulb temperature 19℃.The experimental results show that the prototype has a high air dehumidification rates and COP under hot and humid environment.