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Acceptance of Third Year Mechanical Engineering student research paper

1. Title of the paper: Thermal Modelling of PVT-CPC Integrated Vapour Absorption Refrigeration System

Abstract:

In this paper, the single effect vapour absorption refrigeration (VAR) system is integrated with fully covered semi-transparent photovoltaic thermal-compound parabolic concentrator (PVT-CPC) collector. The thermal model of this integrated system has been obtained under constant mass flow rate mode of the collector. The thermal model is based on the basic energy balance of each component of the integrated system in terms of design and climatic parameters. Also, solar coefficient of performance (SCOP), refrigeration coefficient of performance (RCOP) and exergy coefficient of performance (ECOP) have been evaluated for the proposed integrated system. The numerical simulation have been performed for the climatic conditions of capital city of INDIA (i.e. New Delhi) with the help of MATLAB R2015a. From the results and discussion, it is found that PVT-CPC integrated with VAR system is most suitable for the self-sustained operation up to five hours for a typical day of summer month of New Delhi.

Paper published in Materials Today: Proceedings, Elsevier

Link paper 1: https://doi.org/10.1016/j.matpr.2020.07.547

 

2 Title of the paper: Second Law Analysis of Indirect and Direct Fired Single Effect Absorption Systems

Abstract:

In the present communication, indirect and direct fired single effect vapour absorption refrigeration systems are simulated using lithium bromide-water as the working fluids. First and second Law analyses have been carried out for different operating conditions. The evaporator temperature varies from 5 to 15oC, while the condenser temperature from 25 to 35oC in step of 5oC. Both coefficient of performance (COP) and exergy COP are presented for different operating conditions. Peculiar results of exergy analysis have been found for the indirect and direct fired single effect vapour absorption refrigeration systems. Exergy COP of indirect fired system is around 90% higher, while the optimum generator temperature is 19% lower than the direct fired system. Additionally, effect of preheater is also analysed on the performance of the systems.

Paper published in Materials Today: Proceedings, Elsevier

Link paper 2: https://doi.org/10.1016/j.matpr.2020.07.508

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