Performance analysis of micro combined heat and power system based on building load

doi:10.11949/j.issn.0438-1157.20150709

Abstract

Abstract:

Micro combined heat and power(MCHP)is an effective way of energy conservation.This article mainly aims at establishing a thermodynamic model and analyzing the energy efficiency of micro congeneration system by setting the reference object.Analyze the impact of user's heat to power ratio and purchasing electricity quantity from public grid on CHP energy saving potential under integrating the building load.In this paper,analysis was carried out by importing the MCHP into an office building based on the measured heating and power load characteristics.Calculation was found that the average daily energy saving ratio can reach up to 22.76%-23.16%,the unit exergy efficiency can reach 48.06% in congeneration system during the heating season.

Key words: MCHP, natural gas, heat to power ratio, energy saving ratio, building load, thermodynamics, exergy

摘要：

微型热电联产是节能减排的有效途径。主要针对微型热电联产系统,通过设定参照对象建立热力学模型分析用能效果,并在微型热电联产机组匹配用户负荷条件下分析用户热电比及电网购电比例对联产系统节能潜力的影响。同时结合实测某办公楼供热季度的热电负荷特征确定微型热电联产系统方案,计算发现供热季联供方式日均节能率可达22.76%~23.16%,联供系统中原动机的效率可达48.06%。

关键词: 微型热电联产, 天然气, 热电比, 节能率, 建筑负荷, 热力学, (火用)

CLC Number:

TK01⁺9

LI Yanxue, RUAN Yingjun, LIU Qingrong. Performance analysis of micro combined heat and power system based on building load[J]. CIESC Journal, 2015, 66(S2): 364-370.

李岩学, 阮应君, 刘青荣. 基于建筑负荷的微型热电联产系统性能分析[J]. 化工学报, 2015, 66(S2): 364-370.

References 13

[1]	Jin Hongguang(金红光),Zheng Danxing(郑丹星),Xu Jianzhong(徐建中).Device and Application of Distributed CCHP System(分布式冷热电联产系统装置及应用)[M].Beijing:China Power Press,2008:108-115.
[2]	Chen Qiang(陈强),Han Wei(韩巍),Zhang Na(张娜),Jin Hongguang(金红光).Thermodynamic analysis on a novel CCHP system consisting of a micro gas turbine,a Rankine cycle,and a LiBr-H2O absorption chiller[J].Journal of Engineering Thermophysics(工程热物理学报),2014,35(7):1253-1259.
[3]	Ehyaei M A,Mozafari A. Energy,economic and envir-onmental(3E)analysis of a micro gas turbine employed for on-site combined heat and power production[J].Energy and Buildings, 2010, 42:259-264.
[4]	Bianchi M,De Pascale A,Melino F,Peretto A. Performance prediction of micro-CHP systems using simple virtual operating cycle[J]. Applied Thermal Engineering, 2014,71:771-779.
[5]	Mago P J,Fumo N,Chamra L. Performance analysis of CCHP and CHP systems operating following the thermal and electric load[J]. International Journal of Energy Research,2009,33:852-864.
[6]	Mago P J,Chamra L M,Ramsay J. Micro-combined cooling,heating and power systems hybrid electric-thermal load following operation[J]. Applied Thermal Engin-eering, 2010,30:800-806.
[7]	Jiang Runhua(蒋润花),Yang Xiaoxi(杨晓西),Yang Minlin(杨敏林),Qin Guanfeng(秦贯丰),Yang Xiaoping(杨小平).The optimal analysis of CCHP operatng modes' performance[J]. Journal of Engineering Thermophysics(工程热物理学报),2013,34(10):1818-1822.
[8]	Yin Ping(殷平).Research of combined cooling heating and power system(2):Is it needed to determine power by heating load in the system?[J].HV&AC(暖通空调),2013,43(5):82-87.
[9]	Liu Qingrong(刘青荣),Ruan Yingjun(阮应君),Ren Jianxing(任建兴).Theory analysis of energy saving and emission reduction effect in CCHP system[J]. East China Electric Power(华东电力),2010,38(2):267-270.
[10]	Li Peifeng(李沛峰),Yang Yongping(杨勇平),Chen Yuyong(陈玉勇).Energy Conservation analysis and improvement on combined heat and power heating system[J].Journal of Engineering Thermophysics(工程热物理学报),2013,34(8):1411-1415.
[11]	Lucas K.On the thermodynamics of cogeneration[J]. International Journal of Thermal Science,2000,39(9-11):1039-1046.
[12]	Elmar Pohl, David Diarra. Assessment of primary energy savings by means of CHP systems in domestic energy supply[J].Applied Thermal Engineering,2014,71(2):830-837.
[13]	Lian Leming(廉乐明),Tan Yufei(谭羽非),Wu Jiazheng(吴家正),Zhu Tong(朱彤).Engineering Thermodynamics(工程热力学)[M]. 5th ed.Beijing:China Building Industry Press,2007:97-102.

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