Indian Society for Heat and Mass Transfer
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COMPARATIVE ANALYSIS BETWEEN ORGANIC RANKINE CYCLE INTEGRATED CASCADED VAPOR COMPRESSION-ABSORPTION SYSTEMS

Parth Parmar
Dept. of Mechanical Engineering, School of Technology, Pandit Deendayal Petroleum University

Bhavesh Patel
Dept. of Mechanical Engineering, School of Technology, Pandit Deendayal Petroleum University, Raisan, Gandhinagar 382007, Gujarat, India

Nishith B. Desai
Dept. of Mechanical Engineering, School of Technology, Pandit Deendayal Petroleum University, Gandhinagar-382007, India

Surendra Singh Kachhwaha
Dept. of Mechanical Engineering, School of Technology, Pandit Deendayal Petroleum University, Raisan, Gandhinagar 382007, Gujarat, India

DOI: 10.1615/IHMTC-2017.380
pages 277-284

摘要

Hybrid systems reduce the carbon emissions and increase the energy utilization. Cascaded vapor compression-absorption refrigeration system combines the advantages of the vapor compression refrigeration system (VCRS), i.e., ability to achieve low temperature and vapor absorption refrigeration system (VARS), i.e., ability to use low-grade energy. The simultaneous energy (electricity and heat) need of the cascade system can be achieved through the integration of Organic Rankine cycle (ORC) as a cogeneration unit. In this study, waste heat ORC powered cascaded system with double-effect VARS and conventional VCRS is proposed and performance is compared with the waste heat ORC powered cascaded system with single-effect VARS and conventional VCRS. The proposed system with double-effect VARS requires higher condensation temperature of the ORC (about 160°C) compared to the system with single-effect VARS (about 110°C). The reduction in the VARS generator duty is 44.5% and ORC evaporator duty is 9.5%, with the use of double-effect VARS. As a result, the energetic efficiency of the proposed system is increased from 82% (using single-effect VARS) to 95.4% (using double-effect VARS).

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