新型两级开式吸收式热泵系统性能

doi:10.3969/j.issn.0438-1157.2014.z2.037

化工学报 ›› 2014, Vol. 65 ›› Issue (z2): 248-255.DOI: 10.3969/j.issn.0438-1157.2014.z2.037

新型两级开式吸收式热泵系统性能

叶碧翠¹, 陈光明², 刘骏¹, 郑皎²

1. 浙江大学制冷与低温研究所, 清洁能源利用国家重点实验室, 浙江杭州 310027;
2. 浙江大学宁波理工学院, 浙江宁波 315100

收稿日期:2014-08-20 修回日期:2014-08-29 出版日期:2014-12-30 发布日期:2014-12-30
通讯作者: 陈光明
基金资助:
国家自然科学基金项目(50890184);宁波科技攻关创新项目 (2013B10029)。

A novel double-stage open absorption heat pump system

YE Bicui¹, CHEN Guangming², LIU Jun¹, ZHENG Jiao²

1. Institute of Refrigeration and Cryogenics, State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, Zhejiang, China;
2. Ningbo Institute of Technology, Ningbo 315100, Zhejiang, China

Received:2014-08-20 Revised:2014-08-29 Online:2014-12-30 Published:2014-12-30
Supported by:
supported by the National Natural Science Foundation of China (50890184) and the Major Program of the Industrial Technology Innovation Program of Ningbo (2013B10029).

摘要/Abstract

摘要：

烘干过程广泛应用于造纸、木材、食品加工、化工等行业,并排放大量湿空气,造成能量极大浪费、能源利用效率极低等问题。提出了一种新型两级开式吸收热泵系统,用于回收烘干排气的潜热,并输出高温蒸汽;高温蒸汽直接回用于烘干过程,大大节约了能源并提高了能源利用效率。新系统也可用于回收其他来源的湿空气的潜热。结合造纸烘干过程,对新系统建立了热力学模型以分析其性能,并与传统闭式吸收式热泵系统性能进行了比较。结果表明新系统可产生满足烘干需求的高温蒸汽,回收烘干排气约50%的废热,降低造纸烘干过程能耗达60%以上。在给定工况下新系统的COP根据发生热源温度的不同可达1.204~1.995,而闭式热泵系统的COP最高仅可达1.409。

关键词: 两级, 开式吸收, 热泵, 废热回收, 数学模拟

Abstract:

Considerable amount of energy provided for drying processes is rejected to the environment with the moisture in the discharged moist gas, which results in a significant energy inefficiency of the drying processes. In this paper, a new double-stage open absorption heat pump system has been proposed to recover the latent heat of the moist gas and produce high-temperature output, especially in the forms of steam, which is more practical for industrial application and more easier to store. A mathematical model was constructed to analyze the performance of the system. It was demonstrated that the secondary generator pressure p_g2 had to be optimized to get a high energy-saving rate (RES), but heat recovery rate (η) of moist gas decreased with the increase of p_g2. The optimized p_g2 was 81.78 kPa when pressure of driven steam supplied to generators (p_dsg) supplied to generators was above 750 kPa. The η increased with the increase of p_dsg, and the highest η could achieve 49.5%. It was also found that the RES achieved from 16.47% to 60.3% when p_dsg was from 550 to 850 kPa, which means that when 1 kg paper product was produced 60% of energy consumption could be saved.

Key words: double-stage, open absorption, heat pump, waste heat recovery, mathematical modeling

中图分类号:

TK513.5

叶碧翠, 陈光明, 刘骏, 郑皎. 新型两级开式吸收式热泵系统性能[J]. 化工学报, 2014, 65(z2): 248-255.

YE Bicui, CHEN Guangming, LIU Jun, ZHENG Jiao. A novel double-stage open absorption heat pump system[J]. CIESC Journal, 2014, 65(z2): 248-255.

参考文献 15

[1]	Goh L J, Othman M Y, Mat S, Ruslan H, Sopian K. Review of heat pump systems for drying application[J]. Renewable and Sustainable Energy Reviews, 2011,15: 4788-4796
[2]	Mujumdar A S. Handbook of Industrial Drying[M]. New York: Marcel Dekker Inc., 2005: 1241-1272
[3]	Chua K J, Mujumdar A S, Hawlader M N S. Batch drying of banana pieces-effect of stepwise change in drying air temperature on drying kinetics and product color[J]. Food Research International, 2012, 34: 721-731
[4]	Johansson L, Westerlund L. Description of pilot plant used for timber and bio-fuel drying[J]. Energy, 2000, 25: 1067-1079
[5]	Johansson L, Westerlund L. Improved energy efficiency in sawmill drying system[J]. Applied Energy, 2014, 113: 891-901
[6]	Johansson L, Westerlund L. Energy efficient bio-fuel drying with an open absorption system[J]. Applied Energy, 2000, 67: 231-244
[7]	Westerlund L, Dahl J. Use of an open absorption heat-pump for energy conservation in a public swimming-pool[J]. Applied Energy, 1994, 49: 275-300
[8]	Westerlund L, Hermansson R, Fagerstrom J. Flue gas purification and heat recovery: a biomass fired boiler supplied with an open absorption system[J]. Applied Energy, 2012,96: 444-450
[9]	Wei F, Xiao Y H, Zhang S J. Design and performance analysis of heat cycle systems with absorption heat pumps[J]. Journal of Engineering Thermophysics, 2007, 28: 17-20
[10]	Wei F, Xiao Y H, Zhang S J. The off-design performance of open cycle absorption heat transformer[J]. Journal of Engineering Thermophysics, 2009, 30: 1081-1085
[11]	Lostec B L, Galanis N, Baribeault J, Millette J. Wood chip drying with an absorption heat pump[J]. Energy, 2008, 33: 500-512
[12]	Jeong S, Kang B H, Karng S W. Dynamic simulation of an absorption heat pump for recovering low grade waste heat[J]. Appl. Therm. Eng., 1998, 18: 1-12
[13]	Lin J H. Development of control system of drying process in paper making based on PLC[D].Hangzhou: Zhejiang University, 2006
[14]	Hyland R W, Wexler A. Formulations for the thermodynamic properties of the saturated phases of H2O from 173.15 to 473.15 K[J]. ASHRAE Trans., 1983, 89: 500-519
[15]	Patek J, Klomfar J. A computationally effective formulation of the thermodynamic properties of LiBr-H2O solutions from 273 to 500 K over full composition range[J]. Int. J. Refrig., 2006, 29: 566-578

新型两级开式吸收式热泵系统性能

A novel double-stage open absorption heat pump system

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