Performance analysis of water vapor quasi-saturated compression high temperature heat pump system

doi:10.11949/0438-1157.20221619

Abstract

Abstract:

The water vapor high temperature heat pump (HTHP) combines the environmental protection of natural working medium water and the energy saving of heat pump, and gives full play to the performance advantages of water working medium in the field of HTHP. The water-injection cooling effectively ensures the long-term safety, stability and efficient operation of the unit. In this paper, the possibility and the main problem of constructing reverse Carnot cycle in the heat pump system are analyzed. It is proved theoretically that continuous injection of low enthalpy water working medium into the working chamber during the process of water vapor compression can not only effectively reduce the exhaust superheat at the end of compression, but also improve the overall performance of the system. The influence of suction superheat and water-injection cooling times on system performance was theoretically analyzed, and it was concluded that the existence of suction superheat was not conducive to the improvement of system performance, while the increase of water-injection times was beneficial to system performance. However, when the water-injection times exceeded 5 times, the improvement of system performance was very slow. When the suction superheat was 20℃, COP decreased by 1.45%—1.54% compared with non-suction superheat. When the water-injection cooling times reached 30, COP increased by 3.10%—3.73% compared with one water-injection.

Key words: water working medium, quasi-saturation compression, water-injection cooling

摘要：

水蒸气高温热泵将自然工质水的环保性和热泵的节能性相结合，充分地发挥了水工质在高温热泵领域的性能优势，喷水降温更是有效地保证了机组的长期安全稳定与高效运行。分析了在热泵系统中构建逆卡诺循环的可能性，以及面临的主要问题，从理论上证实了在水蒸气压缩的过程中往工作腔内连续喷入低焓值的水工质来实现水蒸气的准饱和压缩，不仅能够有效地降低压缩终了的排气过热度，还有利于提高系统整体性能。针对吸气过热度和喷液冷却次数对系统性能的影响进行了理论分析，得出吸气过热度的存在不利于系统性能的提升，而喷液次数的增加则对于系统性能有利，但当喷液次数超过5次以后，系统性能的提升就十分缓慢了。当吸气过热度为20℃时，和无吸气过热度相比，COP降低了1.45%~1.54%；当喷水次数达到30次，和1次喷水相比，COP提升了3.10%~3.73%。

关键词: 水工质, 准饱和压缩, 喷水降温

CLC Number:

TK 123

Di WU, Bin HU, Ruzhu WANG, Junyu LIANG. Performance analysis of water vapor quasi-saturated compression high temperature heat pump system[J]. CIESC Journal, 2023, 74(S1): 45-52.

吴迪, 胡斌, 王如竹, 梁俊宇. 水蒸气准饱和压缩高温热泵循环性能分析[J]. 化工学报, 2023, 74(S1): 45-52.

Figures/Tables 7

Fig.1 Classification of heat pumps based on heating temperature[2]

Fig.2 The p-v and T-s diagram of heat pump system

Fig.3 The p-v and T-s diagram of heat pump system with inter-cooling

Fig.4 The T-s diagram of quasi-saturation compression of water vapor heat pump system

Fig.5 The schematic diagram of water vapor heat pump system with one time water-injection

Fig.6 Impact of suction superheat on system performance

Fig.7 Impact of water-injection times on system performance

References 28

1	Arpagaus C, Bless F, Uhlmann M, et al. High temperature heat pumps: market overview, state of the art, research status, refrigerants, and application potentials[J]. Energy, 2018, 152: 985-1010.
2	Wu D, Hu B. Wang R Z. Vapor compression heat pumps with pure low-GWP refrigerants[J]. Renewable and Sustainable Energy Reviews, 2021, 138: 110571.
3	Wilk V, Hartl M, Fleckl T, et al. Hochtemperatur-wärmepumpe für industrieanwendungen: prüfstandsmessungen und systemsimulation[C]. Dkv-Tagung, 2016.
4	Huang M, Liang X, Zhuang R. Experimental investigate on the performance of high temperature heat pump using scroll compressor[C]// 12th IEA Heat Pump Conference. Rotterdam, 2017.
5	Moisi H, Rieberer R. Refrigerant selection and cycle development for a high temperature vapor compression heat pump[C]//12th IEA Heat Pump Conference. Rotterdam, 2017.
6	Wemmers A K, Haasteren A W M B v, Kremers P K J. Test results R600 pilot heat pump[C]// 12th IEA Heat Pump Conference. Rotterdam, 2017.
7	Bamigbetan O, Eikevik T M, Nekså P, et al. Theoretical analysis of suitable fluids for high temperature heat pumps up to 125 ℃ heat delivery[J]. International Journal of Refrigeration, 2018, 92: 185-195.
8	Hu B, Wu D, Wang L W, et al. Exergy analysis of R1234ze(Z) as high temperature heat pump working fluid with multi-stage compression[J]. Frontiers in Energy, 2017, 11(4): 493-502.
9	Sho F, Chieko K, Nobuo T, et al. Low GWP refrigerants R1234ze(E) and R1234ze(Z) for high temperature heat pumps[J]. International Journal of Refrigeration, 2014, 40: 161-173.
10	Kondou C. Thermodynamic assessment of high-temperature heat pumps using low-GWP HFO refrigerants for heat recovery[J]. International Journal of Refrigeration, 2015, 53: 126-141.
11	Hassan A H, Corberan J M, Payá J, et al. Performance analysis of a high temperature heat pump for compressed heat energy storage system using R-1233zd(E) as working fluid[C]// Conference on High Temperature Heat Pumps. 2019.
12	杨兴林, 李自强, 赵海波, 等. 基于适定工质的准二级压缩循环在高温工况下的特性研究[J]. 流体机械, 2019, 47(9): 40-46, 11.
	Yang X L, Li Z Q, Zhao H B, et al. Study on characteristics of quasi-secondary compression cycle based on suitable working fluid under high temperature conditions[J]. Fluid Machinery, 2019, 47(9): 40-46, 11.
13	Alhamid M I, Aisyah N, Nasruddin N, et al. Thermodynamic and environmental analysis of a high-temperature heat pump using HCFO-1224yd(Z) and HCFO-1233zd(E)[J]. International Journal of Technology, 2019, 10(8): 1585-1592.
14	Chamoun M, Rulliere R, Haberschill P, et al. Water vapour as refrigerant for a new high temperature heat pump[J]. Japanese Journal of Radiological Technology, 2011, 49(6): 1879-1887.
15	Madsboell H, Weel M, Kolstrup A. Development of a water vapor compressor for high temperature heat pump applications[C]// 11th IIR Gustav Lorentzen Conference on Natural Refrigerants. 2014: 891-899.
16	Wu D, Hu B, Wang R Z. Theoretical and experimental investigation on a very high temperature heat pump with water refrigerant[C]// The proceedings of the 25th IIR International Congress of Refrigeration. 2019.
17	Chamoun M, Rulliere R, Haberschill P, et al. Experimental and numerical investigations of a new high temperature heat pump for industrial heat recovery using water as refrigerant[J]. International Journal of Refrigeration, 2014, 44: 177-188.
18	Chamoun M, Rulliere R, Haberschill P, et al. Dynamic model of an industrial heat pump using water as refrigerant[J]. International Journal of Refrigeration, 2012, 35(4): 1080-1091.
19	沈九兵, 何志龙, 邢子文. 采用喷水螺杆式水蒸气压缩机的高温热泵设计及性能分析[J]. 制冷与空调, 2014, 14(2): 95-98.
	Shen J B, He Z L, Xing Z W. Design and performance analysis of high temperature heat pump using water-jet screw type steam compressor[J]. Refrigeration and Air-Conditioning, 2014, 14(2): 95-98.
20	Wu D, Hu B, Wang R Z, et al. The performance comparison of high temperature heat pump among R718 and other refrigerants[J]. Renewable Energy, 2020, 154: 715-722.
21	Wu D, Hu B, Yan H, et al. Modeling and simulation on a water vapor high temperature heat pump system[J]. Energy, 2019, 168: 1063-1072.
22	吴迪, 胡斌, 王如竹, 等. 采用自然工质水的高温热泵系统性能分析[J]. 化工学报, 2018, 69(S2): 95-100.
	Wu D, Hu B, Wang R Z, et al. Preliminary study on high temperature heat pump system with water refrigerant[J]. CIESC Journal, 2018, 69(S2): 95-100.
23	童钧耕. 工程热力学[M]. 4版. 北京: 高等教育出版社, 2007.
	Tong J G. Engineering Thermodynamics[M]. 4th ed. Beijing: Higher Education Press, 2007.
24	边煜竣, 申江. CO₂两级压缩不同循环模式热力学对比分析[J]. 低温与超导, 2017, 45(5): 65-69.
	Bian Y J, Shen J. Thermal dynamic comparison and analysis of different cycles of CO₂ two-stage compression[J]. Cryogenics ＆ Superconductivity, 2017, 45(5): 65-69.
25	刘思煦, 黄跃武, 陈鹏. 两级压缩空气源热泵系统的多目标优化分析[J]. 建筑热能通风空调, 2015, 34(1): 58-61.
	Liu S X, Huang Y W, Chen P. Multi-objective optimization of a two-stage air-source heat pump[J]. Building Energy ＆ Environment, 2015, 34(1): 58-61.
26	杨清强. 螺杆空压机两级压缩节能技术分析[J]. 深冷技术, 2009(5): 14-16.
	Yang Q Q. Analysis on the energy saving technique of two-stage compression in screw air compressor[J]. Cryogenic Technology, 2009(5): 14-16.
27	黄忠, 丁勇, 孙纯武. 螺杆式压缩机容积效率计算方法的探讨[J]. 重庆大学学报(自然科学版), 2002, 25(8): 118-119.
	Huang Z, Ding Y, Sun C W. A method of calculating the volumetric flow rate for screw refrigerating compressor[J]. Journal of Chongqing University (Natural Science Edition), 2002, 25(8): 118-119.
28	Tian Y F, Shen J B, Wang C, et al. Modeling and performance study of a water-injected twin-screw water vapor compressor[J]. International Journal of Refrigeration, 2017, 83: 75-87.

[1]	Di WANG, Yinghan CUI, Lingfang SUN, Yunlong ZHOU. Thermodynamic analysis of supercritical carbon dioxide mixed working fluid energy storage system [J]. CIESC Journal, 2024, 75(10): 3414-3423.
[2]	Jiaqi DING, Haitao LIU, Pu ZHAO, Xiangning ZHU, Xiaofang WANG, Rong XIE. Study on intelligent rolling prediction of the multiphase flows in coal-supercritical water fluidized bed reactor for hydrogen production [J]. CIESC Journal, 2024, 75(8): 2886-2896.
[3]	Xinzi ZHOU, Zenghui LI, Xianyang MENG, Jiangtao WU. Experimental study on viscosity of high purity air at low temperatures [J]. CIESC Journal, 2024, 75(3): 782-788.
[4]	Lin WANG, Rongding JIANG, Chunxiao ZHANG, Xiuzhen LI, Yingying TAN. Evaluation and predictive study of the mixing rules for vapor-liquid equilibrium of R1234yf mixtures [J]. CIESC Journal, 2024, 75(2): 475-483.
[5]	Rui SUN, Hua TIAN, Zirui WU, Xiaocun SUN, Gequn SHU. Study on the critical properties calculation models of CO₂-based binary mixture working fluid [J]. CIESC Journal, 2024, 75(2): 439-449.
[6]	Peiwei YAN, Manzheng ZHANG, Meng XIAO, Zheng MIAO. Study on the control strategy of a geothermal organic Rankine cycle system [J]. CIESC Journal, 2023, 74(12): 4810-4819.
[7]	Zhewen CHEN, Junjie WEI, Yuming ZHANG, Wei ZHANG, Jiazhou LI. Thermodynamic analysis of CO₂ near-zero-emission power system with integrated solar energy, supercritical water gasification of coal and SOFC [J]. CIESC Journal, 2023, 74(11): 4688-4701.
[8]	Junrui DENG, Zeyu LI, Jiayan CHEN. Pseudo-passive heat removal system for thermal safety of power battery [J]. CIESC Journal, 2023, 74(11): 4679-4687.
[9]	Zhuang CHEN, Guangdi LI, Hongxuan ZENG, Hongxia ZHAO. Flow simulation and performance analysis of adjustable ejector for trans-critical CO₂ two-phase flow [J]. CIESC Journal, 2023, 74(11): 4515-4526.
[10]	Zhewen CHEN, Junjie WEI, Yuming ZHANG. System integration and energy conversion mechanism of the power technology with integrated supercritical water gasification of coal and SOFC [J]. CIESC Journal, 2023, 74(9): 3888-3902.
[11]	Manzheng ZHANG, Meng XIAO, Peiwei YAN, Zheng MIAO, Jinliang XU, Xianbing JI. Working fluid screening and thermodynamic optimization of hazardous waste incineration coupled organic Rankine cycle system [J]. CIESC Journal, 2023, 74(8): 3502-3512.
[12]	Minghui CHANG, Lin WANG, Jiajia YUAN, Yifei CAO. Study on the cycle performance of salt solution-storage-based heat pump [J]. CIESC Journal, 2023, 74(S1): 329-337.
[13]	Zhen LONG, Jinhang WANG, Junjie REN, Yong HE, Xuebing ZHOU, Deqing LIANG. Experimental study on inhibition effect of natural gas hydrate formation by mixing ionic liquid with PVCap [J]. CIESC Journal, 2023, 74(6): 2639-2646.
[14]	Xiaoyu YAO, Jun SHEN, Jian LI, Zhenxing LI, Huifang KANG, Bo TANG, Xueqiang DONG, Maoqiong GONG. Research progress in measurement methods in vapor-liquid critical properties of mixtures [J]. CIESC Journal, 2023, 74(5): 1847-1861.
[15]	Hao ZHANG, Huibin XU, Jian GAO, Dihong LIU, Zehua ZHOU. Geldart-D wet particle tilt-fall behavior and its reinforcement [J]. CIESC Journal, 2023, 74(4): 1519-1527.