Step-by-step retrofit of heat exchanger network with heat pump installation and multi-objective optimization strategies

doi:10.3969/j.issn.0438-1157.2014.10.031

Abstract

Abstract: In order to investigate the comprehensive effects of heat pump installation on energy saving and CO₂ emission reduction in heat exchanger network (HEN) retrofit, a step-by-step multi-objective optimization model with combination of multiple strategies was proposed for HEN retrofit, in which the objective was to minimize the annual HEN retrofit cost and newly increased CO₂ emissions. A HEN retrofit problem of a benzol-ketone dewaxing unit was taken to illustrate the effectiveness of the proposed method. The Pareto fronts that represented the trade-offs between economy and CO₂ emission were presented. The location of heat pump installation in HEN was discussed. For the three retrofit strategies, the effects of economy, CO₂ emission and energy saving were compared and analyzed. The proposed method would provide theoretical fundamentals for formulating schemes of energy conservation and CO₂ emission control in process industries.

Key words: heat exchanger network, model, optimization, carbon dioxide, heat pump, fuel switching

摘要： 为了研究热泵设置对换热网络系统节能和CO₂减排的综合影响，建立了以换热网络年度化的改造费用和新增CO₂排放量最小为目标的多策略分步改造的多目标优化模型。以酮苯脱蜡装置的换热网络改造为例，阐明了本文所提方法的有效性，并获得了经济性和CO₂排放量目标权衡的Pareto曲线。本文还对热泵在换热网络中的设置位置进行了讨论，对比和分析了换热网络优化、热泵设置和燃料替换3种改造策略的经济性、减排效果以及节能效果。该方法可为过程工业系统的节能和CO₂排放控制策略的制定提供理论依据。

关键词: 换热网络, 模型, 优化, 二氧化碳, 热泵, 燃料替换

CLC Number:

TQ021.8

KANG Lixia, LIU Yongzhong. Step-by-step retrofit of heat exchanger network with heat pump installation and multi-objective optimization strategies[J]. CIESC Journal, 2014, 65(10): 3976-3983.

康丽霞, 刘永忠. 考虑热泵设置的换热网络分步改造及其多目标优化策略[J]. 化工学报, 2014, 65(10): 3976-3983.

References 22

[1]	Hipólito-Valencia B J, Lira-Barragán L F, Ponce-Ortega J M, Serna-González M, El-Halwagi M M. Multiobjective design of interplant trigeneration systems [J]. AIChE Journal, 2014, 60(1): 213-236
[2]	Hua Ben(华贲). Resources and energy trends of petrochemical industry in low carbon era [J]. CIESC Journal(化工学报), 2013, 64(1): 76-83
[3]	Yuan Z, Chen B. Process synthesis for addressing the sustainable energy systems and environmental issues [J]. AIChE Journal, 2012, 58(11): 3370-3389
[4]	Klemeš J J, Varbanov P S, Kravanja Z. Recent developments in process integration [J]. Chemical Engineering Research and Design, 2013, 91(10): 2037-2053
[5]	Klemeš J J, Varbanov P S. Heat integration including heat exchangers, combined heat and power, heat pumps, separation processes and process control [J]. Applied Thermal Engineering, 2012, 43: 1-6
[6]	Rezaei H, Zarei M, Fazlollahi F, Sarkari M, Shahraki F, Baxter L L. Energy saving in a crude distillation unit by a retrofit design of heat exchanger networks [J]. Indian Journal of Chemical Technology, 2013, 20(4): 290-293
[7]	Qian Yu(钱宇), Yang Siyu(杨思宇), Jia Xiaoping(贾小平), Li Xiuxi(李秀喜), Li Hengchong(李恒冲). Life cycle assessment and sustainability of energy and chemical process [J]. CIESC Journal(化工学报), 2013, 64(1): 133-147
[8]	Bagajewicz M, Valtinson G. On the minimum number of units in heat exchanger networks [J]. Industrial & Engineering Chemistry Research, 2014
[9]	Mahmoud A, Shuhaimi M, Abdel Samed M. A combined process integration and fuel switching strategy for emissions reduction in chemical process plants [J]. Energy, 2009, 34(2): 190-195
[10]	Tiew B J, Shuhaimi M, Hashim H. Carbon emission reduction targeting through process integration and fuel switching with mathematical modeling [J]. Applied Energy, 2012, 92：686-693
[11]	Zhang Bosheng(张卜升), Liu Yongzhong(刘永忠), Liang Xiaoqiang(梁肖强), Yan Zhe(闫哲). Multi-objective optimization and retrofit of energy utilization system in a refinery based on CO2 emission control [J]. Journal of East China University of Science and Technology: Natural Science Edition(华东理工大学学报：自然科学版), 2012, 38(6): 702-706
[12]	Shen Renjie(沈人杰), Chen Hui(陈慧), Liu Xiaofei(刘晓飞). Integration of energy saving and emission reduction of an acetone-benzol dewaxing device [J]. Chemical Industry and Engineering Process(化工进展), 2013, 32(3): 702-706
[13]	Waheed M A, Oni A O, Adejuyigbe S B, Adewumi B A, Fadare D A. Performance enhancement of vapor recompression heat pump [J]. Applied Energy, 2014, 114: 69-79
[14]	Wu S, Li H, Cheng J, Tian C. Current situations and technical development of energy-savings in China refrigeration industries [J]. Applied Thermal Engineering, 2013, 53(2): 271-277
[15]	Wang R Z, Yu X, Ge T S, Li T X. The present and future of residential refrigeration, power generation and energy storage [J]. Applied Thermal Engineering, 2013, 53(2): 256-270
[16]	Linnhoff B, Hindmarsh E. The pinch design method for heat exchanger networks [J]. Chemical Engineering Science, 1983, 38(5): 745-763
[17]	Farhanieh B, Sunden B. Analysis of an existing heat exchanger network and effects of heat pump installations [J]. Heat Recovery Systems and CHP, 1990, 10(3): 285-296
[18]	Nilsson K, Sund N B. Optimizing a refinery using the pinch technology and the mind method [J]. Heat Recovery Systems and CHP, 1994, 14(2): 211-220
[19]	Yang M, Feng X, Chu K H. Graphical analysis of the integration of heat pumps in chemical process systems [J]. Industrial & Engineering Chemistry Research, 2013, 52: 8305-8310
[20]	Kapustenko P O, Ulyev L M, Boldyryev S A, Garev A O. Integration of a heat pump into the heat supply system of a cheese production plant [J]. Energy, 2008, 33(6): 882-889
[21]	Becher H, Vuillermoz A, Mar Chal F. Heat pump integration in a cheese factory [J]. Applied Thermal Engineering, 2012, 43: 118-127
[22]	Price L, Sinton J, Worrell E, Phylipsen D, Xiulian H, Ji L. Energy use and carbon dioxide emissions from steel production in China [J]. Energy, 2002, 27(5): 429-446