工业制冷系统组合式热回收节能方案研究
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摘要
为改善氨工业制冷系统的运行能效和经济性,对螺杆式制冷机组系统,提出一种回收压缩机氨蒸气显热部分冷凝热和油冷却器润滑油余热的组合式热回收方案。该方案在压缩机排气管上增设氨热回收器,在油分离器和油冷却器之间增设油热回收器。理论计算表明,热回收系统所回收的总热负荷相较于压缩机输入功率的百分比R_(t,p)可达84. 2%～99. 6%,而组合式热回收系统的综合性能系数COP_c比无热回收制冷系统的COP高29. 0%～62. 5%。系统改造实例表明,本组合式热回收方案节能效益显著,系统改造投资的静态回收期较短。
To improve system operating energy and economic efficiencies,a combined heat recovery option that could reclaim the excessive oil heat from oil cooler and the sensible part of condensing heat of ammonia vapor from compressor was presented for ammonia industrial refrigeration system using screw compressor. This option needed an ammonia heat recovering heat exchanger to be added in the discharge line of compressor,and a oil heat recovering heat exchanger to be added between oil separator and oil cooler. Theoretical calculation indicates that R_(t,p),which is the percentage of total heat recovered compared with compressor input power,can be 84. 2% ～ 99. 6%,and the comprehensive coefficient of performance COP_c of the combined heat recovery system can be 29. 0% ～ 62. 5% higher than the COP of the system without such a heat recovery system. Renovated practical example system shows that this combined heat recovery option can have significant energy-saving and economic effect,and the static payback period for renovation investment is short.
To improve system operating energy and economic efficiencies,a combined heat recovery option that could reclaim the excessive oil heat from oil cooler and the sensible part of condensing heat of ammonia vapor from compressor was presented for ammonia industrial refrigeration system using screw compressor. This option needed an ammonia heat recovering heat exchanger to be added in the discharge line of compressor,and a oil heat recovering heat exchanger to be added between oil separator and oil cooler. Theoretical calculation indicates that R_(t,p),which is the percentage of total heat recovered compared with compressor input power,can be 84. 2% ～ 99. 6%,and the comprehensive coefficient of performance COP_c of the combined heat recovery system can be 29. 0% ～ 62. 5% higher than the COP of the system without such a heat recovery system. Renovated practical example system shows that this combined heat recovery option can have significant energy-saving and economic effect,and the static payback period for renovation investment is short.
引文
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[13]魏洪生,朱世龙,孙铁军.小型屠宰工厂冷凝热回收及高温热泵热水系统的应用[J].肉类工业,2014(7):40-42.
[14]吴邦喜,夏坤,黄劲松.制冷系统排气热回收器的应用[J].冷藏技术,2012(4):42-45.
[15]刘昌丰,于志强.热回收技术在工业制冷系统中的应用[J].制冷与空调,2013,13(9):13-17.
[16]刘群生,徐卫星,张冰,等.工业螺杆制冷系统的全热回收[J].低温与超导,2017,46(6):82-86.
[17]刘群生,杜娟丽,马彦军.螺杆双机配组制冷机组的设计[J].低温与超导,2015,43(9):76-80.
[18]Zhang Jianyi,Eckhard A Groll.Survey of the design of refrigeration plants for public refrigerated warehouses[J].ASHRAE Transactions,2005,111(2):327-332.
[19]李宪光.工业制冷集成新技术与应用[M].北京:机械工业出版社,2017.
[2]中国物流与采购联合会冷链物流专业委员会,中国物流技术协会,国家农产品现代物流工程技术研究中心.中国冷链物流发展报告(2015)[M].北京:中国财富出版社,2015.
[3]国际制冷学会.国际制冷学会关于制冷领域应优先研究的问题列表[J].制冷学报,2006,27(3):59-62.
[4]周光辉,余娜,张震.空调冷凝热热回收技术研究现状及发展趋势[J].低温与超导,2008,36(10):65-68+81.
[5]Vasile Minea.Improved supermarket refrigeration and heat recovery system[J].ASHRAE Transactions,2006,112(2):592-596.
[6]Vasile Minea.Supermarket refrigeration system with completely secondary loops[J].ASHRAE Journal,2007,49(9):40-56.
[7]Richard Royal.Heat recovery in retail refrigeration[J].ASHRAE Journal,2010,52(2):14-22.
[8]江辉民,王洋,马最良.家用空调冷凝热回收热水供应系统的实验分析[J].流体机械,2006,34(2):64-67.
[9]李聪,彭朝晔,曾振威.冷水机组热回收应用探讨[J].暖通空调,2006,36(增):189-192.
[10]林晓丽.全热回收型冷水机组的应用[J].暖通空调,2011,41(5):67-71.
[11]唐毅,杨仕超,林昌元.3种空气源热泵热回收机组的比较[J].暖通空调,2014,44(5):92-96.
[12]郑大宇,刘卫党,韩祥民.对现有大型制冷系统的冷凝热回收的研究[J].哈尔滨商业大学学报(自然科学版),2010,26(5):592-594.
[13]魏洪生,朱世龙,孙铁军.小型屠宰工厂冷凝热回收及高温热泵热水系统的应用[J].肉类工业,2014(7):40-42.
[14]吴邦喜,夏坤,黄劲松.制冷系统排气热回收器的应用[J].冷藏技术,2012(4):42-45.
[15]刘昌丰,于志强.热回收技术在工业制冷系统中的应用[J].制冷与空调,2013,13(9):13-17.
[16]刘群生,徐卫星,张冰,等.工业螺杆制冷系统的全热回收[J].低温与超导,2017,46(6):82-86.
[17]刘群生,杜娟丽,马彦军.螺杆双机配组制冷机组的设计[J].低温与超导,2015,43(9):76-80.
[18]Zhang Jianyi,Eckhard A Groll.Survey of the design of refrigeration plants for public refrigerated warehouses[J].ASHRAE Transactions,2005,111(2):327-332.
[19]李宪光.工业制冷集成新技术与应用[M].北京:机械工业出版社,2017.