Experimental optimization of an absorption-compression heat pump with wet compression for large temperature glide industrial applications

被引：1

作者：

Hamid, Khalid ^{[1
]}

Ren, Shuai ^{[1
]}

Tolstorebrov, Ignat ^{[1
]}

Hafner, Armin ^{[1
]}

Sajjad, Uzair ^{[2
]}

Arpagaus, Cordin ^{[3
]}

Moen, Ole Marius ^{[4
]}

Eikevik, Trygve M. ^{[1
]}

机构：

[1] Norwegian Univ Sci & Technol, Dept Energy & Proc Engn, N-7491 Trondheim, Norway

[2] King Fahd Univ Petr & Minerals, Interdisciplinary Res Ctr Ind Nucl Energy IRC SES, Dhahran 31261, Saudi Arabia

[3] OST Eastern Univ Appl Sci, Inst Energy Syst, CH-9471 Buchs, Switzerland

[4] SINTEF Energy Res, N-7034 Trondheim, Norway

来源：

RENEWABLE ENERGY | 2025年 / 243卷

关键词：

High temperature heat pump; Absorption-compression; Oil free twin-screw compressor; NH 3 /H 2 O mixture; Osenbr & uuml; ck cycle; Large Temperature Glide; WORKING DOMAINS; FALLING FILM; WATER; AMMONIA/WATER; REFRIGERANTS; PERFORMANCE; MIXTURES; RECOVERY; DESIGN; CYCLE;

D O I：

10.1016/j.renene.2025.122531

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The present work demonstrates the experimental optimization of a single-stage compression-absorption heat pump system for an application with a large temperature glide on the heat sink side using wet compression. The primary focus is weak solution injection to optimize the compressor discharge temperature and absorber heat sink temperature glide optimizations and their effect. With constant heat sink and source inlet temperatures at 60 degrees C and a mass flow rate of 0.25 kg/s, preliminary results show that the system delivers 50 kW of heating load and 26 kW of cooling load, respectively. Increasing the heat sink temperature glide between 28 degrees C and 48 degrees C reduces Lorenz COP and improves system efficiency. A weak solution mass flow rate of 0.015-0.25 kg/s with a minimum absorber pressure of 15 bar is recommended to achieve a higher heat sink temperature glide. Increasing the weak solution injection flow rate from 0 to 0.03 kg/s decreases the compressor discharge temperature from 139 degrees C to 122 degrees C, with a constant 0.0015 kg/s injection directed to the bearing and shaft seal. The results also highlight differences in the overall heat transfer coefficients and heat flux between absorbers 1 and 2. Absorber 1, operating in bubble mode, performs better with a maximum heat transfer coefficient of 1.39 kW/m2K compared to absorber 2, which operates in falling film mode. The system's performance and behavior are comprehensively evaluated, providing a foundation for future improvements and advancements in oil-free absorption-compression heat pump technology.

引用

页数：16

共 43 条

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