Quantitive estimation and availability analysis of waste heat from vehicle biogas plant

doi:10.11975/j.issn.1002-6819.2017.17.031

	Quantitive estimation and availability analysis of waste heat from vehicle biogas plant
	Zhang, Jia 1,2,3,4,5; Xing, Tao 3,4,5; Sun, Yongming 3,4,5; Kong, Xiaoying 3,4,5; Kang, Xihui 3,4,5; Lü, Pengmei 3,4,5; Wang, Chunlong1,2 ; Li, Jinping1,2
	2017-09-01
发表期刊	Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
ISSN	10026819
卷号	33 期号:17 页码:232-238
摘要	Vehicle biogas, the product deriving from the organic waste anaerobic digestion accompanying with the purification and compression process, has the advantages of higher energy efficiency, environmentally friendliness, sustainability, and so on. The vehicle biogas plant has aroused attention from all walks of life and owned a broad prospect, because it can not only dispose organic waste, but also produce clean vehicle biogas. However, there were still several problems in its operation process, such as high operating costs, high energy consumption and low utilization rate of waste heat. In order to solve these problems, this paper establishes a model of vehicle biogas plant which produces 10000 m3 biogas daily. We firstly introduce the general situation of this model and calculate the potential of waste heat. What's more, the availability of waste heat is evaluated. Finally, combined with the requirement of heat, the suggestion of the waste heat utilization is put forward. Results of analysis show that this plant needs a lot of thermal energy, approximately accounting for 30.01%-36.44% of biogas energy. Moreover, merely recycling a part of the CO2-poor MEA liquid waste heat after decarburization results in low utilization rate of waste heat. It also reveals that the main parts of the waste heat in the system are made up of 5 types, i.e. waste heat from stripper top gas for decarburization, CO2-poor MEA liquid waste heat after decarburization, waste heat of cooling water from compressor, waste heat in biogas slurry and waste heat of boiler exhaust gas. Besides, the low-grade waste heat has the characteristics of enormous quantity and stabilization. The main parts of heat required include the heat of the fermentation liquid, the heat of maintaining high-temperature anaerobic digestion and the heat of decarburization. The calculation of requirement of heat shows that the quantity of total heat required is 7.85×104 MJ/d in the coldest month, and 6.48×104 MJ/d in the hottest month. The calculation of waste heat indicates that the potential of total waste heat is respectively 5.87×104 MJ/d in the coldest month, and 4.79×104 MJ/d in the hottest month. The corresponding maximum energy-saving rate is 74.81% and 73.92%, respectively. The energy-saving potential of each part of waste heat in descending order of quantity is: waste heat of biogas slurry > waste heat of CO2-poor MEA liquid after decarburization > waste heat of stripper top gas for decarburization > waste heat of cooling water from compressor > waste heat of boiler exhaust gas. Additionally, the analysis of waste heat proves that waste heat from this project can be more effectively utilized and preferably collected. Based on the analysis above, we propose some suggestions about the utilization of waste heat: 1) It is recommended that the waste heat of stripper top gas is collected to drive heat pump rather than cycle in system. 2) Waste heat of CO2-poor MEA liquid can be used to warm the low-temperature CO2-rich MEA liquid via the heat exchanger. 3) We recommend the waste heat of compressor cooling water is adopted to produce hot water by the heat pump, which will be regarded as domestic hot water or heating hot water. 4) Waste heat of biogas slurry can be used to heat low-temperature fermentation liquid by heat exchanger. 5) Waste heat of boiler exhaust gas can produce stream by heat exchanger, which is applied into system itself. © 2017, Editorial Department of the Transactions of the Chinese Society of Agricultural Engineering. All right reserved.
关键词	Anaerobic digestion Biogas Biomass Boilers Carbon dioxide Compressors Cooling Cooling water Decarburization Energy efficiency Energy utilization Fermentation Gallium Gases Heat pump systems Liquids More electric aircraft Operating costs Temperature Thermal energy Waste heat Waste heat utilization Water Availability analysis Compression process Domestic hot water Energy saving potential Energy-saving rates High energy consumption Low-grade waste heat Quantitive estimation
DOI	10.11975/j.issn.1002-6819.2017.17.031
收录类别	EI
语种	中文
出版者	Chinese Society of Agricultural Engineering
EI入藏号	20174604388008
EI主题词	Solid wastes
EI分类号	522 Gas Fuels - 525 Energy Management and Conversion - 537.1 Heat Treatment Processes - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 614 Steam Power Plants - 616.1 Heat Exchange Equipment and Components - 618.1 Compressors - 641.1 Thermodynamics - 641.2 Heat Transfer - 804.2 Inorganic Compounds - 911.1 Cost Accounting
来源库	Compendex
分类代码	522 Gas Fuels - 525 Energy Management and Conversion - 537.1 Heat Treatment Processes - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 614 Steam Power Plants - 616.1 Heat Exchange Equipment and Components - 618.1 Compressors - 641.1 Thermodynamics - 641.2 Heat Transfer - 804.2 Inorganic Compounds - 911.1 Cost Accounting
引用统计	无
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/114894
专题	能源与动力工程学院
作者单位	1.Western Energy and Environment Research Center of China, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Key Laboratory of Complementary Energy System of Biomass and Solar Energy, Lanzhou; 730050, China; 3.Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou; 510640, China; 4.CAS Key Laboratory of Renewable Energy, Guangzhou; 510640, China; 5.Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou; 510640, China
第一作者单位	兰州理工大学
第一作者的第一单位	兰州理工大学
推荐引用方式 GB/T 7714	Zhang, Jia,Xing, Tao,Sun, Yongming,et al. Quantitive estimation and availability analysis of waste heat from vehicle biogas plant[J]. Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering,2017,33(17):232-238.
APA	Zhang, Jia.,Xing, Tao.,Sun, Yongming.,Kong, Xiaoying.,Kang, Xihui.,...&Li, Jinping.(2017).Quantitive estimation and availability analysis of waste heat from vehicle biogas plant.Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering,33(17),232-238.
MLA	Zhang, Jia,et al."Quantitive estimation and availability analysis of waste heat from vehicle biogas plant".Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering 33.17(2017):232-238.