Experimental research on plate heat exchanger in OTEC system

Jingping Peng; Fengyun Chen; Lei Liu; Yunzheng Ge; Haoyu Wu; Weimin Liu

doi:10.6180/jase.202003_23(1).0003

Experimental research on plate heat exchanger in OTEC system

Jingping Peng, Fengyun Chen, Lei Liu, Yunzheng Ge, Haoyu Wu, Weimin Liu This email address is being protected from spambots. You need JavaScript enabled to view it.

First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China

Received: May 27, 2019
Accepted: November 22, 2019
Download Citation: ||https://doi.org/10.6180/jase.202003_23(1).0003

ABSTRACT

A plate heat exchanger suitable for ocean thermal energy conversion (OTEC) system was designed and developed to carry out the theoretical analysis and experimental research. An experimental OTEC plant was constructed to test the performance of the heat exchanger. The heat transfer characteristics of plate heat exchangers with different heat fluxes were studied. At the same time, the transient operating characteristics of the plate heat exchanger and the effect of working fluid flow on the pressure drop were obtained. Combined with the experimental data, dimensionless parameter empirical correlation between heat transfer characteristics and heat flux and the correlation between friction coefficient, Reynolds number and reduced pressure were obtained. The errors were within 20%. The results show that the heat exchanger effectiveness increases with the rise of heat flux under the experimental operating conditions. When the heat flux is greater than 3 kW/m², the increasing extent of heat exchanger effectiveness becames slow. The pressure drop of heat exchanger increases with the growth of working fluid flow rate. When working fluid flow rate is more than 6m³/h, the increasing range of pressure drop in heat exchanger is larger.

Keywords: OTEC; plate heat exchanger; heat exchanger characteristic; pressure drop

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