分布式热泵调峰型热电联产烟气余热回收系统评价
|
摘要
为尽可能地提高燃气供热能力,分布式热泵调峰技术在热力站处二次网侧采用热泵进行供热调峰,同时利用热泵原理降低一次网回水温度,为热源处低温余热回收创造有利条件,进而提高系统供热效率.为了评价分布式热泵调峰技术在集中供热系统中的可行性和应用效果,以一套二拖一大型9F级燃气蒸汽联合循环背压供热机组为例,对分布式热泵调峰型燃气热电联产烟气余热回收供热系统和常规燃气锅炉调峰供热系统在设计工况及运行工况下进行比较.在系统输入燃气量不变的前提下,新系统较低的回水温度有利于回收更多的烟气余热,在提高系统供热能力、降低供热能耗方面具有优势.节能性和经济性分析表明,该系统供热能耗降低6%,动态增量投资回收期为3.1 a,可实现良好的节能、环保和经济效益.
To improve the natural gas heating supply capacity,distributed heat pump peak-shaving technology has great potential to be further studied and promoted. This technology is to use heat pump to adjust heat on the secondary network in substation,simultaneously,to reduce the return water temperature of primary network by using the principle of heat pump. Return water of primary network with low temperature creates favorable conditions to recover waste heat in heat source,and improve heating efficiency. This paper takes a set of two 9 F gas-steam combined cycle back pressure heating unit as an example and evaluates its feasibility and application effect. It is compared with a general gas boiler peak-shaving system on the design and operation condition. For comparison,fuel consumption of these two heating systems are almost the same. Heating energy consumption of new system is reduced by 6%. Dynamic investment-increment payback period is 3.1 years,meaning that the new system has good economy. The research shows that the system can improve network transmission and distribution capacity,increase heating capacity and reduce heating energy consumption. And it also can ensure the safety of heating.
To improve the natural gas heating supply capacity,distributed heat pump peak-shaving technology has great potential to be further studied and promoted. This technology is to use heat pump to adjust heat on the secondary network in substation,simultaneously,to reduce the return water temperature of primary network by using the principle of heat pump. Return water of primary network with low temperature creates favorable conditions to recover waste heat in heat source,and improve heating efficiency. This paper takes a set of two 9 F gas-steam combined cycle back pressure heating unit as an example and evaluates its feasibility and application effect. It is compared with a general gas boiler peak-shaving system on the design and operation condition. For comparison,fuel consumption of these two heating systems are almost the same. Heating energy consumption of new system is reduced by 6%. Dynamic investment-increment payback period is 3.1 years,meaning that the new system has good economy. The research shows that the system can improve network transmission and distribution capacity,increase heating capacity and reduce heating energy consumption. And it also can ensure the safety of heating.
引文
[1]WANG Haichao,LAHDELMA R,WANG Xin,et al.Analysis of the location for peak heating in CHP based combined district heating systems[J].Applied Thermal Engineering,2015,87:402-411.DOI:10.1016/j.applthermaleng.2015.05.017.
[2]WANG Haichao,JIAO Wenling,LAHDELMA R,et al.Technoeconomic analysis of a coal-fired CHP based combined heating system with gas-fired boilers for peak load compensation[J].Energy Policy,2011,39(12):7950-7962.DOI:10.1016/j.enpol.2011.09.050.
[3]陈春寅,付林,袁卫星,等.分布式燃气调峰供热方式热化系数研究[J].暖通空调,2013,43(1):91-94.CHEN Chunyin,FU Lin,YUAN Weixing,et al.Thermalization coefficient in distributed gas peak-load heating systems[J].Heating Ventilating and Air Conditioning,2013,43(1):91-94.
[4]朱晏琳.二级网调峰集中供热系统技术经济性研究[D].天津:天津大学,2007.ZHU Yanlin.The technique and economy study of the central heating system with secondary peak-shaving plants[D].Tianjin:Tianjin University,2007.
[5]由世俊,朱晏琳,郑雪晶,等.供热二级网侧设置燃气调峰锅炉的探讨及节能分析[J].暖通空调,2007,37(1):48-51,13.YOU Shijun,ZHU Yanlin,ZHENG Xuejing,et al.Discussion and energy efficiency analysis of installing peak-shaving gas boilers in secondary heat supply network side[J].Journal Heating Ventilating and Airconditioning,2007,37(1):48-51,13.
[6]付林,江亿,张世钢.基于Co-ah循环的热电联产集中供热方法[J].清华大学学报:自然科学版,2008,48(9):1377-1380.FU Lin,JIANG Yi,ZHANG Shigang.District heating system based on Co-ah cycles in combined heating and power systems[J].Qinghua Daxue Xuebao/Journal of Tsinghua University,2008,48(9):1377-1380.
[7]LI Yan,FU Lin,ZHANG Shigang,et al.A new type of district heating method with co-generation based on absorption heat exchange(co-ah cycle)[J].Energy Conversion&Management,2011,52(2):1200-1207.DOI:10.1016/j.enconman.2010.09.015.
[8]LI Yan,FU Lin,ZHANG Shigang,et al.A new type of district heating system based on distributed absorption heat pumps[J].Energy,2011,36(7):4570-4576.DOI:10.1115/es2009-90287.
[9]张世钢,付林,李永红,等.吸收式换热过程及设备[J].暖通空调,2015(9):85-90.ZHANG Shigang,FU Lin,LI Yonghong,et al.Process and equipment based on absorption heat exchange[J].Heating Ventilating&Air Conditioning,2015(9):85-90.
[10]孙健.基于吸收式换热的集中供热关键设备研究[D].北京:清华大学.2013.SU Jian.Application analysis of key devices in centralized heating system basing on absorption heat exchange[D].Beijing:Tsinghua University,2013.
[11]SUN Jian,FU Lin,ZHANG Shigang.Experimental study of heat exchanger basing on absorption cycle for CHP system[J].Applied Thermal Engineering,2016,102:1280-1286.DOI:10.1016/j.applthermaleng.2016.03.138.
[12]SUN Jian,FU Lin,SUN Fangtian,et al.Study on a heat recovery system for the thermal power plant utilizing air cooling island[J].Energy,2014,74(5):836-844.DOI:10.1016/j.energy.2014.07.056.
[13]李岩.基于吸收式换热的热电联产集中供热系统配置与运行研究[D].北京:清华大学,2012.LI Yan.Research on the configuration and operation strategy of district heating system with co-generation based on absorption heat exchange(co-ah)[D].Beijing:Tsinghua University,2012.
[14]刘华.天然气烟气余热深度利用的烟气-水直接接触式换热研究[D].北京:清华大学,2015.LIU Hua.Study of natural gas waste heat deep recovery system based on direct-contact flue-gas condensation exchanger[D].Beijing:Tsinghua University,2015.
[15]刘华,周贤,付林.接触式烟气-水冷凝换热器的热工计算方法[J].暖通空调,2015(2):111-114.LIU Hua,ZHOU Xian,FU Lin,et al.Thermal calculation method for direct-contact flue-gas-water condensation heat exchangers[J].Heating Ventilating&Air Conditioning,2015(2):111-114.
[16]郑忠海,付林,张世钢.分布式燃气调峰的热电联产供热系统[J].区域供热,2013(3):16-21.ZHENG Zhonghai,FU Lin,ZHANG Shigang.Combined heating and power systems with distributed gas peak-shaving[J].District Heating,2013(3):16-21.DOI:10.16651/j.cnki.cn11-3241/tk.2013.03.008.
[2]WANG Haichao,JIAO Wenling,LAHDELMA R,et al.Technoeconomic analysis of a coal-fired CHP based combined heating system with gas-fired boilers for peak load compensation[J].Energy Policy,2011,39(12):7950-7962.DOI:10.1016/j.enpol.2011.09.050.
[3]陈春寅,付林,袁卫星,等.分布式燃气调峰供热方式热化系数研究[J].暖通空调,2013,43(1):91-94.CHEN Chunyin,FU Lin,YUAN Weixing,et al.Thermalization coefficient in distributed gas peak-load heating systems[J].Heating Ventilating and Air Conditioning,2013,43(1):91-94.
[4]朱晏琳.二级网调峰集中供热系统技术经济性研究[D].天津:天津大学,2007.ZHU Yanlin.The technique and economy study of the central heating system with secondary peak-shaving plants[D].Tianjin:Tianjin University,2007.
[5]由世俊,朱晏琳,郑雪晶,等.供热二级网侧设置燃气调峰锅炉的探讨及节能分析[J].暖通空调,2007,37(1):48-51,13.YOU Shijun,ZHU Yanlin,ZHENG Xuejing,et al.Discussion and energy efficiency analysis of installing peak-shaving gas boilers in secondary heat supply network side[J].Journal Heating Ventilating and Airconditioning,2007,37(1):48-51,13.
[6]付林,江亿,张世钢.基于Co-ah循环的热电联产集中供热方法[J].清华大学学报:自然科学版,2008,48(9):1377-1380.FU Lin,JIANG Yi,ZHANG Shigang.District heating system based on Co-ah cycles in combined heating and power systems[J].Qinghua Daxue Xuebao/Journal of Tsinghua University,2008,48(9):1377-1380.
[7]LI Yan,FU Lin,ZHANG Shigang,et al.A new type of district heating method with co-generation based on absorption heat exchange(co-ah cycle)[J].Energy Conversion&Management,2011,52(2):1200-1207.DOI:10.1016/j.enconman.2010.09.015.
[8]LI Yan,FU Lin,ZHANG Shigang,et al.A new type of district heating system based on distributed absorption heat pumps[J].Energy,2011,36(7):4570-4576.DOI:10.1115/es2009-90287.
[9]张世钢,付林,李永红,等.吸收式换热过程及设备[J].暖通空调,2015(9):85-90.ZHANG Shigang,FU Lin,LI Yonghong,et al.Process and equipment based on absorption heat exchange[J].Heating Ventilating&Air Conditioning,2015(9):85-90.
[10]孙健.基于吸收式换热的集中供热关键设备研究[D].北京:清华大学.2013.SU Jian.Application analysis of key devices in centralized heating system basing on absorption heat exchange[D].Beijing:Tsinghua University,2013.
[11]SUN Jian,FU Lin,ZHANG Shigang.Experimental study of heat exchanger basing on absorption cycle for CHP system[J].Applied Thermal Engineering,2016,102:1280-1286.DOI:10.1016/j.applthermaleng.2016.03.138.
[12]SUN Jian,FU Lin,SUN Fangtian,et al.Study on a heat recovery system for the thermal power plant utilizing air cooling island[J].Energy,2014,74(5):836-844.DOI:10.1016/j.energy.2014.07.056.
[13]李岩.基于吸收式换热的热电联产集中供热系统配置与运行研究[D].北京:清华大学,2012.LI Yan.Research on the configuration and operation strategy of district heating system with co-generation based on absorption heat exchange(co-ah)[D].Beijing:Tsinghua University,2012.
[14]刘华.天然气烟气余热深度利用的烟气-水直接接触式换热研究[D].北京:清华大学,2015.LIU Hua.Study of natural gas waste heat deep recovery system based on direct-contact flue-gas condensation exchanger[D].Beijing:Tsinghua University,2015.
[15]刘华,周贤,付林.接触式烟气-水冷凝换热器的热工计算方法[J].暖通空调,2015(2):111-114.LIU Hua,ZHOU Xian,FU Lin,et al.Thermal calculation method for direct-contact flue-gas-water condensation heat exchangers[J].Heating Ventilating&Air Conditioning,2015(2):111-114.
[16]郑忠海,付林,张世钢.分布式燃气调峰的热电联产供热系统[J].区域供热,2013(3):16-21.ZHENG Zhonghai,FU Lin,ZHANG Shigang.Combined heating and power systems with distributed gas peak-shaving[J].District Heating,2013(3):16-21.DOI:10.16651/j.cnki.cn11-3241/tk.2013.03.008.