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Second Thermal and Fluids Engineering  Conference

ISSN: 2379-1748
ISBN: 978-1-56700-430-4

RENEWABLE THERMAL ENERGY ASSISTED NOVEL TRIGENERATION SYSTEM FOR INDUSTRIAL COOLING APPLICATIONS

Bhavesh Patel
Pandit Deendayal Petroleum University, Raisan, Gandhinagar 382007, Gujarat, India

Nishith B. Desai
Pandit Deendayal Petroleum University, Gandhinagar-382007, India

Surendra Singh Kachhwaha
Pandit Deendayal Petroleum University, Raisan, Gandhinagar 382007, Gujarat, India

Abstract

The rising trends of fuel prices and global warming urge the researchers to design energy efficient, environmental friendly, and commercially viable systems. In this regard, role of integrated technologies based on cogeneration, trigeneration, and poly-generation is pivotal. The thrust towards the clean energy demand directs the researchers towards utilization of the renewable energy sources for heating, cooling, and power demands. In this paper, a novel renewable energy powered (solar and biomass) integrated system with organic Rankine cycle (ORC) and vapor compression-absorption cascaded refrigeration system (VCACRS) is proposed. The VCACRS system, which thermodynamically outperformed the conventional stand-alone vapor compression and absorption refrigeration systems, able to achieve -20°C. Comparative analysis of the proposed system using different organic working fluids and concentrating solar collectors have also been presented in this paper. Based on the thermodynamic analysis, organic Rankine cycle with n-Pentane is the most preferred option. Organic Rankine cycle based system with HFE7100 and R245fa require about 18% and 8% higher ORC evaporator heat duty compared to n-pentane. Based on the assumed performance parameters, the overall system efficiency (with n-pentane as ORC fluid) is 54% for PTC-based system, 50.1% for LFR-based system, and 47.1% for paraboloid dish-based system. However, due to lower cosine and other losses paraboloid dish-based system achieves higher solar fraction (0.26) compared to PTC-based system (0.23) and LFR-based system (0.18). Therefore, finalization of the overall configuration requires thermo-economic analysis of the system.

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