A novel double-stage open absorption heat pump system

YE Bicui; CHEN Guangming; LIU Jun; ZHENG Jiao

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

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A novel double-stage open absorption heat pump system

更新时间：2025-12-10

- A novel double-stage open absorption heat pump system
- CIESC Journal Issue z2, Pages: 248-255(2014)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2014.z2.037
  CLC： K513.5
- Online First：30 December 2014，
  
  Published：30 December 2014
- 稿件说明：
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YE Bicui, CHEN Guangming, LIU Jun, et al. A novel double-stage open absorption heat pump system[J]. CIESC Journal, 2014, (z2): 248-255.
DOI：

YE Bicui, CHEN Guangming, LIU Jun, et al. A novel double-stage open absorption heat pump system[J]. CIESC Journal, 2014, (z2): 248-255. DOI： 10.3969/j.issn.0438-1157.2014.z2.037.

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。

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 pg2 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 pg2. The optimized pg2 was 81.78 kPa when pressure of driven steam supplied to generators (pdsg) supplied to generators was above 750 kPa. The η increased with the increase of pdsg

and the highest η could achieve 49.5%. It was also found that the RES achieved from 16.47% to 60.3% when pdsg was from 550 to 850 kPa

which means that when 1 kg paper product was produced 60% of energy consumption could be saved.

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