A desiccant coated heat exchanger can handle sensible load and latent load simultaneously; however

owing to the influence of adsorption heat

the heat load and moisture load treatment is not synchronous

and the ability to handle sensible load is insufficient. Based on this

another sensible heat exchanger is added in-series for the air secondary treatment. An experiment setup was built to test the dynamic performance of two heat exchangers connected in-series. In addition

the influence of the main operation parameters including the water temperature

air temperature

air humidity

and air velocity on the system performance are analyzed. The results show that a sensible heat exchanger can clearly improve the ability to handle sensible load

particularly during the beginning period

and the cooling capacity of the system is also significantly improved. Moreover

under the experiment conditions

the cooling and heating water temperatures can both improve the cooling capacity and COP

a higher air temperature and relative humidity ratio lead to a better performance

and a lower air velocity is helpful for increasing the average dehumidification capacity and the effective dehumidification time.