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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

OPTIMAL GAS-LIQUID RATIO FOR MAXIMUM HEAT TRANSFER THROUGH HEAT-SOURCE-TOWER

Get access (open in a dialog) DOI: 10.1615/IHTC16.nee.023338
pages 7651-7657

Sinopsis

Structured packing is applied to enlarge the contact area for gas and liquid in the heat-source-tower, which aims to absorb sensible and latent heat from air and to provide a low potential heat for heat pump. As a controllable parameter in the operation of heat-source tower, gas-liquid ratio needed to be paid attention. It is possible to adjust the gas-liquid ratio to obtain enough heat transfer capacity, while it has the limited value for fear of the appearance of flooding point. This paper derived the limiting temperature of the absorptive process in theory, by taking advantage of the enthalpy-temperature diagram. In order to obtain the practical optimal value of gas-liquid ratio, the experiments were conducted on the heat transfer between air and ethylene glycol. The results indicates that the total heat transfer capacity increases with the increase of gas-liquid ratio in shape of a parabola. The optimal value of gas-liquid ratio appears when the product of the heat transfer capacity and its increment rate achieves the maximum value. Furthermore, the optimal gas-liquid ratio is 1.50~1.64 when the ambient temperature is -3~3°C and the corresponding total heat transfer capacity is 120.9~177.7kW. This work can provide a theoretical foundation of performance evaluation and practical operation for heat-source tower heat pump.