Performance characterization of gas engine generator integrated with a liquid desiccant dehumidification system |
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| Authors: | Sandeep M Nayak Yunho Hwang Reinhard Radermacher |
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| Affiliation: | 1. EMCOR Energy Services 505 Sansome Street, Suite 1600, San Fransisco, CA 94111, USA;2. Center for Environmental Energy Engineering, Department of Mechanical Engineering, 3163 Glenn Martin Hall Bldg., University of Maryland, College Park, MD 20742, USA;1. Air Conditioning and Refrigeration Laboratory, School of Energy and Environment, Southeast University (SEU), 2 Spailou Street, Xuanwu District, Nanjing 210096, China;2. QingDao Tengyuan Design Institute Co., Ltd, Qingdao 266071, China;1. Air Conditioning and Refrigeration Laboratory, School of Energy and Environment, Southeast University, 2 Sipailou Street, Xuanwu District, Nanjing 210096, China;2. Anhui Transport Consulting& Design Institute, 180 Camphor Avenue, High-tech District, Hefei, Anhui Province 230088, China;1. School of Energy and Safety Engineering, Tianjin Chengjian University, Tianjin 300384, China;2. Qingdao Economic and Technology Development Zone Haier Water-Heater Co. Ltd., Qingdao 266101, China |
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| Abstract: | Combined heat and power (CHP) involves on-site or near-site generation of electricity along with utilization of thermal energy available from the power generation process. CHP has the potential of providing a 30% improvement over conventional power plant efficiency and a CO2 emissions reduction of 45% or more as compared to the US national average. In addition, an overall total system efficiency of 80% can be achieved because of the utilization of thermal energy that would be wasted if only the electric power were utilized, and because of the reduction of transmission, distribution, and energy conversion losses. The current research is being carried out in a four-story educational office building. This research focuses on the design, installation, and analysis of a modular CHP system consisting of a natural gas fired reciprocating engine generator with a liquid desiccant dehumidification system. The engine generator provides 75 kW of electric power to the building load bus while the combined waste heat from the exhaust gases and jacket water are used to regenerate the liquid desiccant. The liquid desiccant unit dehumidifies and cools the ventilation air to the building and supplies it to the mixed air section of the roof top unit. This paper discusses the various aspects involved in the design and installation of the system such as the heat recovery loop design and the electrical interconnection with the building load bus. Test results are also presented and the performance is compared to a traditional power plant with a conventional heating, ventilating, and air-conditioning system. |
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