Abstract
In this paper, a heat driven cooling system that essentially integrated an organic Rankine cycle power plant with a vapour compression cycle refrigerator was investigated, aiming to provide an alternative to absorption refrigeration systems. The organic Rankine cycle (ORC) subsystem recovered energy from the exhaust gases of internal combustion engines to produce mechanical power. Through a transmission unit, the produced mechanical power was directly used to drive the compressor of the vapour compression cycle system to produce a refrigeration effect. Unlike the bulky vapour absorption cooling system, both the ORC power plant and vapour compression refrigerator could be scaled down to a few kilowatts, opening the possibility for developing a small-scale waste heat-driven cooling system that can be widely applied for waste heat recovery from large internal combustion engines of refrigerated ships, lorries, and trains. In this paper, a model was firstly established to simulate the proposed concept, on the basis of which it was optimized to identify the optimum operation condition. The results showed that the proposed concept is very promising for the development of heat-driven cooling systems for recovering waste heat from internal combustion engines’ exhaust gas.
Highlights
Internal combustion (IC) engines have been the primary power source for automobiles, long-haul trucks, locomotives, and ships over the past century [1]
The waste heat was originally used for direct heating services, including space heating in winter [4], heavy fuel oil (HFO) heating [5], ballast water heating [6], and hot water supply
Singh [12] conducted a review of different waste heat recovery systems for power generation, including Rankine cycle, Kalina cycle, exhaust gas turbine system, thermoelectric generation system, and the combination of these technologies, focusing on the utilisation of WHR for the supply of mechanical/electrical power to the ship
Summary
Internal combustion (IC) engines have been the primary power source for automobiles, long-haul trucks, locomotives, and ships over the past century [1]. Singh [12] conducted a review of different waste heat recovery systems for power generation, including Rankine cycle, Kalina cycle, exhaust gas turbine system, thermoelectric generation system, and the combination of these technologies, focusing on the utilisation of WHR for the supply of mechanical/electrical power to the ship. Despite numerous studies on individual WHR technologies for marine diesel engines, the effect of transmission ratio on the performance of the thermodynamic WHR has not been tackled far In this marine engine waste heat recovery and cooling system with combined ORC and3VCC. A marine engine waste heat recovery and cooling system with combined ORC and VCC of transmission ratio on the performance of the thermodynamic WHR has not been tackled far. A comprehensive energy and exergy analysis was carried out and the potential of the
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