Effect of inlet air relative humidity on heat transfer in air conditioning system

Teerachai Howongsakun, Purimpat Sujumnongtokul, Somnuk Theerakulpisut, Pattayagorn Palasan

Abstract


To understand the behavior of heat transfer of cooling coil or the evaporator of air conditioning system is very essential. This research is aiming to study on the effect of inlet air relative humidity on the sensible heat transfer rate. The tested coil of the air conditioning system is fined tube type. The experimental rig was set up followed the international ASHRAE standards. The cooling coil was tested under the inlet air conditions with dry-bulb temperature from 27 ̊C to 40 ̊C, relative humidity from 50% to 100%, and frontal air velocity from 1 m/s to 3m/s; in conclusion, it was found that the sensible heat transfer was decreased when the relative humidity of the inlet air increased. The results show in graphs from can be used to the air-condition design.

Keywords


heat transfer, relative humidity, air conditioning system

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