Exergy Analysis of a Compressor Assisted Triple-Effect Absorption Refrigerating Cycle

Abstract

Adding a compressor to basic in-counter-series triple-effect lithium bromide absorption refrigerating cycle is an effective solution to reduce the temperature of high pressure generator and slow down the corrosion situation. Exergy analysis based on thermodynamic analysis shows that the compressor placed between the low pressure generator and the condenser is the best, which help the system get the highest energy efficiency.

Performance analysis of a triple-effect absorption cooling cycle using aqueous (lithium, potassium, sodium) nitrate solution as a working pair

“…Heat transfer characteristics (UA), kW C À1 Absorbers: ABS(2) and ABS(12) 6.11 Generators: GEN(3), GEN(4) and GEN (13) 17.88 Condensers: CND(5), CND(6) and CND (14) 8.48 Evaporators: EVP(1) and EVP (11) 11.90 Heat exchangers: HEX(7), HEX (8) …”

“…The coupling between these three components CND(5), GEN(3) and EVP (11) is achieved with a heat exchange circuit (coupling loop 2), in which the cooling water leaving the condenser is split into two streams that later flow through the external circuits of the generator and the evaporator. In the coupling loop 1 the heat rejected in the condenser CND (14) and the absorber ABS(12) of the Alkitrate single-effect cycle is used to drive the generator GEN(4) in the double-effect cycle. The cooling-water streams leaving the external circuits of the condenser and the absorber of the high temperature single-effect cycle are mixed and then sent to the external circuit of the high temperature generator of the double-effect cycle.…”

“…Geng and Liu [14] performed an exergy analysis of a compressor assisted triple-effect absorption refrigeration cycle. The authors reported that the addition of a compressor between the low pressure generator and the condenser was an effective solution to reduce the heat source temperature required and to mitigate the corrosion problem in counter-series triple-effect H 2 O/LiBr absorption refrigeration cycles.…”

Thermodynamic analysis of triple effect ammonia–water absorption compression (hybrid) cycle

“…Triple effect H 2 O-LiBr absorption-compression cycle was investigated by Kim et al 17 They observed that the incorporation of a compressor to the triple effect cycle eliminated the corrosion problem associated with the working fluid. Geng and Liu 18 analyzed the triple-effect absorption compression cycle from the viewpoint of exergy. The incorporation of a compressor between the low-pressure generator and the condenser reduces the temperature of heat source and also it eliminated the corrosion issues associated with the working fluid.…”

“…It is inferred from the review of literature that only very few works pertaining to triple-effect absorption compression cycle have been reported in the literature and also those reported have employed water-lithium bromide as working fluid. [16][17][18][19][20] No literature has yet reported triple effect absorption compression cycle utilizing ammonia-water as working fluid. The proposed cycle results in higher COP than the COP of conventional triple effect cycles.…”