Performance Analysis and Comprehensive Evaluation of Solar Organic Rankine Cycle Combined with Transcritical CO2 Refrigeration Cycle

Author:

Zhang Na12,Xu Po1,Wang Yiming1,Tong Wencai3,Yang Zhao2

Affiliation:

1. Ginlong Technology Co., Ltd., Ningbo 315712, China

2. Mechanical Engineering, Tianjin University, Tianjin 300072, China

3. School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, China

Abstract

In order to achieve efficient utilization of solar energy resources, this study combines the trans-critical organic Rankine cycle (ORC) power cycle (TORC) with the trans-critical CO2 refrigeration cycle (TCO2). Additionally, a comprehensive three-level index decision evaluation system is developed based on system safety and environmental protection, thermodynamics, and techno-economic performance. The evaluation focuses on typical medium- and high-temperature solar energy applications and considers six organic working gases. The evaluation results demonstrate that the R600 + CO2 solution outperformed the others. This solution achieved a maximum net output power (Pnet) of 1531.31 kW and 2306.43 kW, a maximum coefficient of performance (COP) of 3.16, a predicted payback period of 2.651 years and 2.033 years, and a benefit–investment ratio of 4.533 and 5.773.

Publisher

MDPI AG

Subject

Energy (miscellaneous),Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment,Electrical and Electronic Engineering,Control and Optimization,Engineering (miscellaneous),Building and Construction

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2. National Development and Reform Commission (2022). Renewable Energy Development Plan for the 14th Five-Year Plan.

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