Operation Mode of Solar and Untreated Sewage Source Heat Pump System for Heating Biogas Digesters
-
摘要: 针对现有热泵沼液增温系统投资高、运行困难的缺陷，设计了一套太阳能-污水热泵沼液增温系统（solar and untreated sewage source heat pump system，SUSSHPS）.该系统设定3种系统运行模式，分别为全年中温增温模式、全年高温增温模式和夏季高温增温、冬季中温增温模式，并从系统运行能耗、环保性、经济性与产气量最大化角度对各增温模式进行理论计算，同时，构建太阳能-污水热泵沼液增温系统运行模式综合评价体系，运用改进熵值法对评价指标进行综合赋权．研究结果表明，全年中温增温模式、全年高温增温模式和夏季高温增温-冬季中温增温模式的综合评价值分别为0.293 0、0.327 5和0.379 5，夏季高温增温-冬季中温增温模式是三者中最优的运行模式.Abstract: A solar and untreated sewage source heat pump system (SUSSHPS) for heating biogas digesters was designed because of the high investment and difficult operation of current heating systems. To determine the optimal operation mode, three operation modes were designed: annual middle-temperature fermentation mode (mode 1), annual high-temperature fermentation mode (mode 2), and summer high-temperature fermentation and winter middle-temperature fermentation mode (mode 3). The three modes were evaluated from four perspectives: energy consumption, environmental protection, economy, and gas production. Finally, a comprehensive evaluation system of SUSSHPS operation mode was built based on comprehensiveness and independence. The evaluation index was a comprehensive weight calculated via an improved entropic coefficient method. The results indicate that model 3 (0.379 5) > model 2 (0.327 5) > model 1 (0.293 0), thus model 3 is the optimal operation mode.
-
Key words:
- untreated sewage /
- solar energy /
- heating system /
- heat pump /
- biogas /
- operation mode
-
图 1 太阳能-污水热泵沼液增温系统流程简图
Figure 1. Structure diagram of solar and untreated sewage source heat pump system
图 2 成都地区生活污水月平均温度及室外月平均温度对比
Figure 2. Comparison of domestic sewage and outdoor monthly mean temperatures in Chengdu
图 3 太阳能-污水热泵沼液增温系统运行模式综合评价体系结构
Figure 3. Structure diagram of index system for SUSSHPS operation mode
表 1 不同模式下系统年产气量
Table 1. Biogas production in different modes
参数 模式1 模式2 模式3 Ri/（m3•a–1） 2 141.1 2 635.2 2 388.2 
下载: 导出CSV
表 2 不同模式下系统运行能耗
Table 2. Energy consumption of different modes
参数 模式1 模式2 模式3 Wre 0.55 1.25 0.89 Qzq 0.53 1.08 0.80 Qsx 0.05 0.11 0.08 Plx 0.19 0.19 0.16 Pqx 0.21 0.21 0.18 Pzx 0.38 0.38 0.38 Qi 1.34 2.03 1.61 Ei 1.66 2.46 2.21
下载: 导出CSV
表 3 不同模式下系统运行能量收益
Table 3. Energy income of different modes
参数 模式1 模式2 模式3 ${Q'_i}$ 10 570.66 16 056.70 12 753.69 ${Q_0}$ 52 671.06 59 819.04 56 246.28 ${Q''_i}$ 42 100.40 43 762.34 43 492.59
下载: 导出CSV
表 4 不同模式下系统运行费用
Table 4. System consumption of different modes
参数 模式1 模式2 模式3 Pc 8 132.14 8 548.51 7 934.84 C 1 556.24 2 363.90 1 877.63 S 162.64 170.97 158.70 Ac 2 674.08 3 538.98 2 968.35
下载: 导出CSV
表 5 不同模式下系统运行环保效益
Table 5. System environmental protection benefits of different modes
参数 模式1 模式2 模式3 Hi/（MJ•a–1） 34 252.28 49 408.21 40 281.67 ηi/% 30.67 0 18.47 By/（t•a–1） 5.63 5.63 5.63 Py/（t•a–1） 2.65 4.32 3.37 Ey/（t•a–1） 3.12 1.04 2.24
下载: 导出CSV
表 6 不同模式下评价指标熵权值计算结果
Table 6. Entropy and weight of each index under various modes
指标 Ej θj wj γj Ri/（m3•a–1） 0.965 6 0.120 7 0.143 3 0.138 5 Qi/kW 0.966 0 0.119 6 0.084 1 0.080 5 Ei 0.965 5 0.121 0 0.186 4 0.180 6 ${Q''_i}$/（MJ•a–1） 0.963 7 0.127 5 0.165 2 0.168 7 Pc/元 0.965 8 0.120 3 0.102 3 0.098 5 Ac/元 0.957 1 0.150 6 0.109 7 0.132 2 T/a 0.965 6 0.120 7 0.104 5 0.101 0 Ey/（t•a–1） 0.966 0 0.119 6 0.104 5 0.100 0
下载: 导出CSV
表 7 不同模式综合评价值
Table 7. Comprehensive evaluation value of different modes
模式1 模式2 模式3 0.293 0 0.327 5 0.379 5
下载: 导出CSV
-
寇巍,郑磊,曲静霞,等. 太阳能与发电余热复合沼气增温系统设计[J]. 农业工程学报,2013,29(24): 211-217KOU Wei, ZHENG Lei, QU Jingxia, et al. Engineering design of solar and power waste energy heating system for biogas project[J]. Transactions of the Chinese Society of Agricultural Engineering, 2013, 29(24): 211-217 裴晓梅,张迪,石惠娴,等. 太阳能地源热泵沼气池加热系统集热面积优化[J]. 农业机械学报,2011,42(1): 122-128PEI Xiaomei, ZHANG Di, SHI Huixian, et al. Collector area optimization of integrated solar and ground source heat pump system for heating biogas digester[J]. Transactions of Agricultural Mechanics, 2011, 42(1): 122-128 寇巍,张欢,孙玉辉,等. 寒冷地区沼气工程增温保温能量效益分析[J]. 太阳能学报,2015,36(3): 708-713KOU Wei, ZHANG Huan, SUN Yuhui, et al. Energy efficiency analysis of insulation and warming for biogas engineering in cold area[J]. Acta Energiae Solaris Sinica, 2015, 36(3): 708-713 KITAMURRA Y, PAQUIN D, GAUTZ L, et al. A rotational hot gas heating system for bioreactors[J]. Biosystems Engineering, 2007, 98(2): 215-223 FORGACS G, ALINEZHAD S, MIRABDOLLAH A, et al. Biological treatment of chicken feather waste for improved biogas production[J]. Journal of Environmental Sciences, 2011, 23(10): 1747-1753 KRAKAT N, WESTPHAL A, SCHMIDT S, et al. Governs methanogen population dynamics biomass: thermophilic temperature anaerobic digestion of renewable[J]. Applied and Environmental Microbiology, 2010, 76(6): 1842-1850 田磊,史琳,吴静,等. 再生水源热泵应用于污泥厌氧处理的能流分析[J]. 华北电力大学学报,2009,36(4): 47-50TIAN Lei, SHI Lin, WU Jing, et al. Analysis on energy flow of sludge anaerobic digestion system equipped with reclaimed water source heat pump[J]. Journal of North China Electric Power University, 2009, 36(4): 47-50 吴荣华,岳利茜. 原生污水源热泵对污水生化处理的影响[J]. 哈尔滨工业大学学报,2011,43(6): 132-135WU Ronghua, YUE Liqian. Effect of untreated sewage source heat pump on biochemical sewage treatment[J]. Journal of Harbin Institute of Technology, 2011, 43(6): 132-135 李瑞容,陈永生,曲浩丽,等. 沼气工程中保温技术研究及经济分析[J]. 中国沼气,2015,33(1): 79-83LI Ruirong, CHEN Yongsheng, QU Haoli, et al. Research on insulation technology and economic analysis for the biogas project[J]. China Biogas, 2015, 33(1): 79-83 西南交通大学. 一种城镇原生污水冷热量的回收利用装置: 中国, CN103836841[P]. 2016-02-24 YIANNOPOULOS A C, MANARIOTIS I D, CHRYSIKOPOULOS C V, et al. Design and analysis of a solar reactor for anaerobic wastewater treatment[J]. Bioresource Technology, 2008, 99(16): 7742-7749 徐峰. 城市生活污水冷热资源利用集成系统研究[D]. 重庆: 重庆大学, 2010 王晓东,赵力,李育红. 污水源热泵制热工况的实际运行特性分析[J]. 暖通空调,2008,38(1): 99-102WANG Xiaodong, ZHAO Li, LI Yuhong. Operating Performance analysis on heating conditions of sewage source heat pumps[J]. Heating Ventilating and Air-Conditioning, 2008, 38(1): 99-102 宋伟. 大连市某污水源热泵-太阳能热水供应系统运行特性分析[D]. 大连: 大连理工大学, 2014 庄兆意. 污水源热泵系统的工况研究与优化设计[D]. 哈尔滨: 哈尔滨工业大学, 2007 李玉娥,董红敏,万运帆,等. 规模化养鸡场CDM项目减排及经济效益估算[J]. 农业工程学报,2009,25(1): 194-198LI Yu’e, DONG Hongmin, WAN Yunfan, et al. Emission reduction from Clean Development Mechanism projects on intensive livestock farms and its economic benefits[J]. Transactions of the CSAE, 2009, 25(1): 194-198 裴晓梅,石惠娴,朱洪光,等. 太阳能-沼液余热式热泵高温厌氧发酵加温系统[J]. 同济大学学报,2012,40(2): 292-296PEI Xiaomei, SHI Huixian, ZHU Hongguang, et al. Heating system of temperature biogas digester by solar energy and methane liquid heat recovery heat pump[J]. Journal of TongJi University, 2012, 40(2): 292-296 韩伟,李素芬,代兰花. 太阳能-土壤源热泵联合供暖系统的运行模式研究[J]. 节能,2011,30(4): 64-68HAN Wei, LI Sufen, DAI Lanhua. Study on operation mode of solar energy-ground source heat pump system[J]. Energy Conservation, 2011, 30(4): 64-68 郭沛,余南阳,谭玲. 基于改进熵值模型的生物质能源化利用区域选择研究[J]. 可再生能源,2017,35(9): 1272-1278GUO Pei, YU Nanyang, TAN Ling. Study on the region selection of the biomass utilization for energy based on improved entropic coefficient model[J]. Renewable Energy Resources, 2017, 35(9): 1272-1278 陈豫,杨改河,冯永忠,等. " 三位一体”沼气生态模式区域适宜性评价指标体系[J]. 农业工程学报,2009,25(3): 174-178CHEN Yu, YANG Gaihe, FENG Yongzhong, et al. Index system for regional suitability evaluation of trinity biogas ecosystem[J]. Transactions of the CSAE, 2009, 25(3): 174-178 -
下载:
点击查看大图
计量
- 文章访问数: 326
- HTML全文浏览量: 124
- PDF下载量: 31
- 被引次数: 0