Recovery and effective utilization of waste heat from the exhaust of internal combustion engines for cooling applications using ANSYS

Author:

Gohar Ghulam Abbas12ORCID,Khan Muhammad Zia Ullah2ORCID,Raza Hassan1ORCID,Ahmad Arslan2,Raza Yasir2,Manzoor Tareq3,Arshad Zeeshan2,Aslam Faraz2,Ullah Muhammad Safi2,Arif Musa2

Affiliation:

1. Department of Mechanical Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong

2. Department of Mechanical Engineering, COMSATS University Islamabad, Sahiwal Campus, Sahiwal, Pakistan

3. Energy Research Centre, COMSATS University Islamabad, Lahore Campus, Lahore, Pakistan

Abstract

The exhaust gases from an internal combustion (IC) engine carry away about 75% of the heat energy which means only 25% of heat energy is operated for power production. A recovery unit at the exhaust outlet port can ensure heat exchange between different temperature fluids through conjugate heat transfer phenomena. This study represents heat recovery from exhaust gases that are emitted from IC engines which can be utilized in various applications such as vapor absorption refrigeration systems. In the present work, a new type of perforated fin heat exchanger for waste heat recovery of exhaust gases is designed using SolidWorks, and the flow field design of the heat recovery system is optimized using ANSYS software. Various parameters (velocity, pressure, temperature, and heat conduction) of hot and cold fluid have been analyzed. Inlet velocity of cold fluids including refrigerant (LiBr solution), water, and graphene oxide (GO) nanofluid have been adopted at 0.03 m/s, 0.165 m/s, and 0.3 m/s, respectively. Inlet velocity of hot fluid is taken as 2 m/s, 4 m/s, and 6 m/s, respectively, to develop a test matrix. The results showed that maximum temperature reduction by the exhaust is achieved at 104.8°C using graphene oxide nanofluids with an inlet velocity of 0.3 m/s and exit velocity of 2 m/s in the heat recovery unit. Similarly, temperature reduction by exhaust gases is acquired at 102 °C using water and 96.34 °C by using a refrigerant (LiBr solution) with the same exit velocity (2 m/ s). Furthermore, maximum effectiveness of 0.489 is also obtained for GO nanofluid when compared with water and the refrigerant. On the other hand, the refrigerant has the maximum log mean temperature difference from all fluids with a value of 224.4 followed by water and GO.

Publisher

SAGE Publications

Subject

Mechanical Engineering

Cited by 3 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Investigating the Heat Transfer Characteristics of Fin-prolonged Heat Exchanger for Waste Heat Recovery;2023 14th International Conference on Mechanical and Intelligent Manufacturing Technologies (ICMIMT);2023-05-26

2. Effective waste heat recovery from engine exhaust using fin prolonged heat exchanger with graphene oxide nanoparticles;Journal of the Indian Chemical Society;2023-02

3. An Efficient Method for Heat Recovery Process and燭emperature燨ptimization;Computers, Materials & Continua;2023

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