首页|Energy,exergy,economic,and environmental compromising performance of dual-stage evaporation-ammonia hybrid compression-absorption refrigeration system for the cooling supply of keto-benzene dewaxing process
Energy,exergy,economic,and environmental compromising performance of dual-stage evaporation-ammonia hybrid compression-absorption refrigeration system for the cooling supply of keto-benzene dewaxing process
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Energy,exergy,economic,and environmental compromising performance of dual-stage evaporation-ammonia hybrid compression-absorption refrigeration system for the cooling supply of keto-benzene dewaxing process
Absorption refrigeration systems driven by low-temperature waste heat is one way to achieve"carbon neutrality."Meanwhile,the keto-benzene dewaxing equipment needs a cooling capacity of 5 MW,with refrigeration temperature of-10 ℃ and-25 ℃.This paper researches the feasibility of dual-stage evaporation-ammonia hybrid compression-absorption refrigeration system(DSE-AHCARS)replacing the vapor compression refrigeration system for keto-benzene dewaxing process based on energy,exergy,economic,and environmental(4E)analysis.At the primary-and secondary-stage evaporation temper-ature of 0 and-23 ℃,respectively,the coefficient of performance(COP)reaches the maximum value of 0.85;however,COP-electricity reaches the minimum value of 8.1.When the secondary-stage refrigera-tion temperature is-23 ℃,CO2 emission increases from 1150 t·a-1 to 3600 t·a-1,and life cycle climate performance increases from 3.29 × 104 to 7.7 × 104 t,with the primary-stage refrigeration temperature being-15-0 ℃,as well as matching three parameters to ensure the 4E compromising performance by the multi-objective optimization.To guarantee that the life cycle climate performance is less than 5.5 × 104 t,the payback period is＜2 a,and COP is＞0.6 at the optimal operation ranges,such that the refrigeration temperature difference between primary stage and secondary stage is within 20 ℃.The power of DSE-AHCARS was reduced by 77％compared with the vapor-compression refrigeration system.Therefore,the DSE-AHCARS can reduce CO2 emissions by about 6250 t·a-1 and save 1.2 × 105 t of CO2 in the life cycle climate performance term.This result shows that the DSE-AHCARS can completely replace the vapor-compression refrigeration system.
Shuaishuai Zhang、Yuanbo Liu、Tong Zheng、Da Ruan、Zhong Lan、Tingting Hao、Xuehu Ma
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State Key Laboratory of Fine Chemicals,Liaoning Key Laboratory Clean Utilization of Chemical Resources,Institute of Chemical Engineering,Dalian University of Technology,Dalian 116024,China
Evaporation Optimal design Thermodynamic process Multi-objective optimization Ammonia hybrid refrigeration
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