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http://dx.doi.org/10.5916/jkosme.2014.38.4.502

Basic performance analysis of ocean thermal energy conversion using the refrigerant mixture R32/R152a  

Cha, Sang Won (Seawater Utilization Plant Research Center, Korea Research Institute of Ships & Ocean Engineering)
Lee, Ho Saeng (Seawater Utilization Plant Research Center, Korea Research Institute of Ships & Ocean Engineering)
Moon, Deok Soo (Seawater Utilization Plant Research Center, Korea Research Institute of Ships & Ocean Engineering)
Kim, Hyeon Ju (Seawater Utilization Plant Research Center, Korea Research Institute of Ships & Ocean Engineering)
Abstract
In this paper, performance characteristics of cycles were studied when mixed working fluid was used for ocean thermal energy conversion (OTEC). Among the various mixed refrigerants for industrial heat-pump, R32/R152a used in ocean thermal energy conversion system. For simulations, R32/R152a were used in existing closed cycle and Kalina cycle which is used only ammonia and water as mixed refrigerant. Temperature of the warm heat source was 26 and 29 celsius degree, temperature of the cold heat source was 5 celsius degree. In results of simulation, Gross power of the closed cycle on R32 was 22kW, and efficiency of the cycle was 2.02%. When the mixed refrigerant of R32/R152a, in the ratio of 90 to 10, gross power of the closed cycle was 29.93kW, and efficiency of the cycle was 2.78%. Gross power and cycle efficiency of R32/R152a increased by 36% and 37% than those of existing single refrigerant. Additionally, the same simulations were conducted in Kalina cycle with the same various composition ratio of mixed refrigerant.
Keywords
Kalina cycle; Mixed working fluids; Ocean Thermal Energy Conversion;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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