槽式太阳能辅助生物质热电联产系统热力学性能分析

doi:10.12096/j.2096-4528.pgt.21044

发电技术 ›› 2021, Vol. 42 ›› Issue (6): 653-664.DOI: 10.12096/j.2096-4528.pgt.21044

槽式太阳能辅助生物质热电联产系统热力学性能分析

薛凯(), 王义函(), 陈衡(), 徐钢(), 雷兢()

热电生产过程污染物监测与控制北京市重点实验室(华北电力大学), 北京市昌平区 102206

收稿日期:2021-04-27 出版日期:2021-12-31 发布日期:2021-12-23
通讯作者: 徐钢
作者简介:薛凯(1996), 男, 硕士研究生, 研究方向为多能互补系统集成, xkncepu@163.com
王义函(1995), 男, 硕士研究生, 研究方向为多能互补系统集成, wangyhpost@163.com
徐钢(1978), 男, 博士, 教授, 研究方向为能源系统大数据分析与人工智能优化、热电联产机组深度节能、燃煤机组CO₂减排等, xg2008@ncepu.edu.cn
雷兢(1978), 男, 博士, 副教授, 研究方向为能源利用与转化过程正/反数学物理问题的解法、最优化方法与机器学习等, leijing2002@126.com
基金资助:
国家自然科学基金项目(51806062);中央高校基本科研业务费(2020MS006)

Thermodynamic Performance Analysis of a Parabolic Trough Solar-assisted Biomass-fired Cogeneration System

Kai XUE(), Yihan WANG(), Heng CHEN(), Gang XU(), Jing LEI()

Beijing Key Laboratory of Emission Surveillance and Control for Thermal Power Generation(North China Electric Power University), Changping District, Beijing 102206, China

Received:2021-04-27 Published:2021-12-31 Online:2021-12-23
Contact: Gang XU
Supported by:
National Natural Science Foundation of China(51806062);Fundamental Research Funds for the Central Universities(2020MS006)

摘要/Abstract

摘要：

可再生能源互补热电联产系统在区域综合能源利用领域具有广阔的应用前景。提出了一种槽式太阳能辅助生物质热电联产系统，利用中低温槽式太阳能加热导热油，驱动吸收式热泵给热网水预加热，在生物质燃料与供热量保持恒定的条件下节省采暖抽汽、增加功率输出。采用EBSILON Professional软件对案例机组和集成系统进行建模仿真，在此基础上分析了系统能流与?损等热力学特性。结果表明：设计工况下可产生1.78 MW·h的太阳能发电量，光电效率为20.06%，光电转换?效率可达到21.60%。选取5个典型日探讨不同辐照条件下的系统性能，结果发现3月21日的太阳辐射与系统性能均为最优。对整个供热季进行逐时仿真分析，可知供热期5个月产生太阳能发电量共计1 124.30 MW·h，平均光电效率为16.49%。

关键词: 槽式太阳能, 生物质热电联产, 吸收式热泵, 系统集成, 热力学分析

Abstract:

The integration of renewable energy combined heat and power system has broad application prospects in the field of regional comprehensive energy utilization. This paper proposed a parabolic trough solar-assisted biomass-fired cogeneration system. The system uses medium and low temperature trough solar energy to heat the thermal oil that drives the absorption heat pump to preheat the supply-water, while the biomass fuel and heat output keep constant. The extraction steam for heating is decreased while power generation is increased. The EBSILON professional software was used to model and simulate the case plant and integrated system, and on this basis, the thermodynamic characteristics of energy flow and exergy loss of the system were analyzed. The results show that, under the design conditions, 1.78 MW·h of solar power can be generated, the solar-to-electricity efficiency is 20.06%, and the solar-to-electricity exergy efficiency can reach 21.60%. Five typical days were selected to explore the performance under different radiation conditions. We found that the solar radiation and system performance on March 21st are both the best. A time-by-hour simulation analysis was conducted for the entire heating season. A total of 1 124.30 MW·h of solar power is produced in the five-month heating period with an average solar-to-electricity efficiency of 16.49%.

Key words: trough solar energy, biomass-fired cogeneration, absorption heat pump, system integration, thermodynamic analysis

中图分类号:

TK519

薛凯, 王义函, 陈衡, 徐钢, 雷兢. 槽式太阳能辅助生物质热电联产系统热力学性能分析[J]. 发电技术, 2021, 42(6): 653-664.

Kai XUE, Yihan WANG, Heng CHEN, Gang XU, Jing LEI. Thermodynamic Performance Analysis of a Parabolic Trough Solar-assisted Biomass-fired Cogeneration System[J]. Power Generation Technology, 2021, 42(6): 653-664.

图/表 24

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参数	数值
主蒸汽压力/MPa	9.40
主蒸汽温度/℃	535.0
主蒸汽流量/(kg/s)	38.89
排汽压力/kPa	4.90
排汽温度/℃	32.5
排汽流量/(kg/s)	22.20
锅炉效率/%	89.0

参数	数值
主蒸汽压力/MPa	9.40
主蒸汽温度/℃	535.0
主蒸汽流量/(kg/s)	38.89
排汽压力/kPa	4.90
排汽温度/℃	32.5
排汽流量/(kg/s)	22.20
锅炉效率/%	89.0

参数	RH1	RH2	RH3	RH4	RH5	RH6
抽汽温度/℃	391.4	312.9	288.1	182.8	120.8	85.4
抽汽压力/MPa	2.85	1.44	1.13	0.37	0.18	0.06
抽汽流量/(kg/s)	2.28	1.37	7.02	1.43	1.73	2.44
疏水温度/℃	193.4	165.7	-	115.0	84.7	32.5
疏水流量/(kg/s)	2.28	4.07	-	1.43	3.15	5.60
出口给水温度/℃	219.3	187.8	160.1	133.0	109.4	79.1
出口给水流量/(kg/s)	38.89	38.89	38.89	33.35	33.35	33.35

参数	RH1	RH2	RH3	RH4	RH5	RH6
抽汽温度/℃	391.4	312.9	288.1	182.8	120.8	85.4
抽汽压力/MPa	2.85	1.44	1.13	0.37	0.18	0.06
抽汽流量/(kg/s)	2.28	1.37	7.02	1.43	1.73	2.44
疏水温度/℃	193.4	165.7	-	115.0	84.7	32.5
疏水流量/(kg/s)	2.28	4.07	-	1.43	3.15	5.60
出口给水温度/℃	219.3	187.8	160.1	133.0	109.4	79.1
出口给水流量/(kg/s)	38.89	38.89	38.89	33.35	33.35	33.35

参数	数值
集热器组件长(宽)度/m	150.00(5.76)
集热器组件有效光学面积/m²	817.43
玻璃外壳的外(内)径/m	0.120(0.115)
吸收管外(内)径/m	0.070(0.065)
最大光学效率/%	75.00
集热器数量/个	12
镜场总有效光学面积/m²	9 809.16

槽式太阳能辅助生物质热电联产系统热力学性能分析

Thermodynamic Performance Analysis of a Parabolic Trough Solar-assisted Biomass-fired Cogeneration System

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摘要/Abstract

引用本文

图/表 24

参考文献 38

相关文章 10

编辑推荐

Metrics

参数	数值
DNI/(W/m²)	908.67
导热油进(出)口温度/℃	123.0(153.0)
导热油流量/(kg/s)	82.37
太阳能输入量/(MW·h)	8.88
镜场效率/%	52.18
有效能/(MW·h)	4.64

参数	案例机组	集成系统	差值
热网供水进口温度/℃	50.0	76.3	26.3
热网供水出口温度/℃	99.0	99.0	0
热网供水流量/(kg/s)	74.91	74.91	0
供热抽汽压力/MPa	1.13	1.13	0
供热抽汽温度/℃	288.1	288.1	0
供热抽汽流量/(kg/s)	5.56	2.69	−2.87
供热疏水温度/℃	60.0	86.3	26.3
供热疏水流量/(kg/s)	5.56	2.69	−2.87
热网加热器热负荷/(MW·h)	15.39	7.16	−8.23

参数	数值
集热器单位成本/(元/m²)	1 400.00
吸收式热泵初始投资/万元	455.63
给水加热器初始投资/万元	29.79
土地单位成本/集热器单位成本	0.012
上网电价/[元/(kW·h)]	1.20
年运行与维护成本/总初始投资	0.01
折现率/%	8.00

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[8]	张燕平, 张宇超, 刘易飞. 基于概率可靠度的槽式太阳能电站优化设计[J]. 发电技术, 2020, 41(6): 590-598.
[9]	张俊博,金旭,刘忠彦,车德勇,隋军. 吸收式热泵余热回收先进技术综述[J]. 发电技术, 2020, 41(3): 269-280.
[10]	周宇昊, 张海珍, 宋胜男. 多能互补分布式能源实验平台系统关键技术研究[J]. 发电技术, 2017, 38(6): 5-9,37.

参数	数值
导热油进(出)口温度/℃	153.0(123.0)
导热油流量/(kg/s)	82.37
冷却水进(出)口温度/℃	27.5(25.5)
冷却水流量/(kg/s)	416.67
热网水进(出)口温度/℃	50.0(76.3)
热网水流量/(kg/s)	74.91
供热量/(MW·h)	8.23
COP	1.776

参数	数值
导热油进(出)口温度/℃	153.0(123.0)
导热油流量/(kg/s)	82.37
冷却水进(出)口温度/℃	27.5(25.5)
冷却水流量/(kg/s)	416.67
热网水进(出)口温度/℃	50.0(76.3)
热网水流量/(kg/s)	74.91
供热量/(MW·h)	8.23
COP	1.776

参数	案例机组	集成系统	差值
生物质燃料量/(kg/s)	11.82	11.82	0
DNI/(W/m²)	-	908.67	-
太阳能输入量/(MW·h)	-	8.88	-
总输入能量/(MW·h)	111.54	120.42	8.88
供热量/(MW·h)	15.39	15.39	0
净发电量/(MW·h)	29.98	31.76	1.78
净太阳能发电量/(MW·h)	-	1.78	-
总能量转换效率/%	40.67	39.15	−1.52
光电效率/%	-	20.06	-

参数	案例机组	集成系统	差值
生物质燃料量/(kg/s)	11.82	11.82	0
DNI/(W/m²)	-	908.67	-
太阳能输入量/(MW·h)	-	8.88	-
总输入能量/(MW·h)	111.54	120.42	8.88
供热量/(MW·h)	15.39	15.39	0
净发电量/(MW·h)	29.98	31.76	1.78
净太阳能发电量/(MW·h)	-	1.78	-
总能量转换效率/%	40.67	39.15	−1.52
光电效率/%	-	20.06	-