Abstract

Conventional Diesel Generator (DG) sets operation produces electric power as well as exhaust heat. These DG sets are comparatively inefficient in terms of fuel consumption and they generate a large amount of exhaust heat. About one-third of the input energy is in terms of exhaust gas and generally, this is not harnessed for any useful applications. Exhaust heat from DG set employed in high altitude areas can be an essential heat source for residential/commercial shelters for various applications like hot water for hygiene, sanitation, and laundry purpose. It can be used for radiant heating of residential/commercial spaces utilizing WHR system. This paper presents the design and parametric analysis of waste heat recovery system (WHR) based on the exhaust of DG set with specific application of residential/commercial space heating at high altitude. To evaluate the performance of the developed WHR, CFD-based analysis was carried out using ANSYS FLUENT. Two models of WHR were analyzed for performance evaluation. The first conventional segmental baffle-based WHR was evaluated followed by Helical baffled WHR. Parametric CFD analysis for baffle inclinations was carried out. The analysis shows that the effectiveness predicted by CFD simulation with 10° helical baffled WHR is 15% higher than segmental baffled WHR.

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