RESEARCH ON LIQUID DESICCANT AIR CONDITIONING SYSTEM WITH COMBINED UTILIZATION OF SOLAR AND GEOTHERMAL ENERGY

Peng Donggen; Li Yindi; Zhang Zhentao

doi:10.19912/j.0254-0096.tynxb.2021-1270

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (3) : 360-367. DOI: 10.19912/j.0254-0096.tynxb.2021-1270

RESEARCH ON LIQUID DESICCANT AIR CONDITIONING SYSTEM WITH COMBINED UTILIZATION OF SOLAR AND GEOTHERMAL ENERGY

Peng Donggen¹, Li Yindi¹, Zhang Zhentao^2,3

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Abstract

Aiming at the problems of poor comfort and high energy consumption caused by the combined treatment of temperature and humidity in the traditional air conditioning system, a liquid desiccant dehumidification air conditioning system driven by the combined utilization of solar energy and geothermal energy is established with its mathematical model by using TRNSYS simulation software, taking a building in Nanchang as the research object, and the effects of collector area and buried pipe number on the system are analyzed. On this basis, appropriate parameters are selected to simulate the annual operating conditions of the system. At the same time, aiming at the problem of great fluctuation in moisture content of outdoor fresh air in summer, a solution of shunting fresh air is put forward. The results show that the average indoor temperature is about 26.1 ℃ and the relative humidity is between 50%-65%; Under the condition of heating, the indoor average temperature is about 19.2 ℃ with the relative humidity of mostly between 40%-60%, which shows the indoor hot and humid environment are well controlled. The energy efficiency ratio in heating season and in refrigeration season are 6.2 and 4.5, respectively and the annual performance coefficient is 4.7, which are significantly higher than the traditional air conditioning system.

Key words

liquid desiccant dehumidification / solar energy / ground source heat pump / energy efficiency ratio / TRNSYS

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Peng Donggen, Li Yindi, Zhang Zhentao. RESEARCH ON LIQUID DESICCANT AIR CONDITIONING SYSTEM WITH COMBINED UTILIZATION OF SOLAR AND GEOTHERMAL ENERGY[J]. Acta Energiae Solaris Sinica. 2023, 44(3): 360-367 https://doi.org/10.19912/j.0254-0096.tynxb.2021-1270

References

[1] 刘晓华, 江亿, 张涛. 温湿度独立控制空调系统[M]. 北京: 中国建筑工业出版社, 2013: 2-11.
LIU X H, JIANG Y, ZHANG T.Temperature and humidity independent control air conditioning system[M]. Beijing: China Construction Industry Press, 2013: 2-11.
[2] 邢孔祖. 考虑室内空气品质的新风独立除湿系统优化运行控制研究[D]. 广州: 华南理工大学, 2016.
XING K Z.The research on optimized operation control of dedicated outdoor air dehumidification system considering indoor air quality[D]. Guangzhou: South China University of Technology, 2016.
[3] 蔡伟光.中国建筑能耗研究报告(2020)[EB/OL]. https://cabee.org/site/content/24021.html.
CAI W G.China building energy consumption research report(2020)[EB/OL]. https://cabee.org/site/content/24021.html.
[4] 汤海波, 翁文兵, 李霞, 等. 温湿度独立控制空调系统夏季性能分析[J]. 建筑节能, 2020, 48(9): 47-50, 110.
TANG H B, WENG W B, LI X, et al.Performance analysis of air Aonditioning System with independent control of temperature and humidity in summer[J]. Building energy efficiency, 2020, 48(9): 47-50, 110.
[5] LI X D.Analysis on the utilization of temperature and humidity independent control air-conditioning system with different fresh-air handling methods[J]. Procedia engineering, 2017, 205: 71-78.
[6] LAZZARIN R M, CASTELLOTTI F.A new heat pump desiccant dehumidifier for supermarket application[J]. Energy and buildings, 2007, 39(1): 59-65.
[7] 李刚, 佘灿明, 池兰, 等. 太阳能溶液除湿空调系统的室内热舒适性模拟[J]. 太阳能学报, 2019, 40(8): 2279-2288.
LI G, YU C M, CHI L, et al.Indoor thermal comfort simulation of solar energy liquid descient air conditioning sustem[J]. Acta energiae solaris sinica, 2019, 40(8): 2279-2288.
[8] KIM T, KATO S, MURAKAMI S, et al.Study on indoor thermal environment of office space controlled by cooling panel system using field measurement and the numerical simulation[J]. Building and environment, 2005, 40(3): 301-310.
[9] 常晓敏, 刘晓华, 江亿. 内冷型溶液除湿器的热质交换分析及流型比较研究[J]. 太阳能学报, 2009, 30(2): 170-176.
CHANG X M, LIU X H, JIANG Y.Research on the heat and mass transfer performance and flow-pattern comparison of the internally-cooled liquid desiccant dehumidifiers[J]. Acta energiae solaris sinica, 2009, 30(2): 170-176.
[10] KESSLING W, LAEVEMANN E, KAPFHAMMER C.Energy storage for desiccant cooling systems component development[J]. Solar energy, 1998, 64(4-6): 209-221.
[11] ZHANG T, LIU X H, JIANG J J, et al.Experimental analysis of an internally-cooled liquid desiccant dehumidifier[J]. Building and environment, 2013, 63: 1-10.
[12] 杨世铭, 陶文铨. 传热学[M]. 北京: 高等教育出版社, 2006: 486-488.
YANG S M, TAO W Q.Heat Tranfer[M]. Beijing: Higher Education Press, 2006: 486-488.
[13] 祝彩霞, 孙婷婷, 刘艳峰, 等. 太阳能与空气源热泵联合供暖系统容量匹配及运行优化[J]. 太阳能学报, 2021, 42(8): 215-222.
ZHU C X, SUN T T, LIU Y F, et al.Capacity matching and operation optimization of solar energy and air source heat pump combined heating system[J]. Acta energiae solaris sinica, 2021, 42(8): 215-222.
[14] FUJIWARA M.Exergy analysis for the performance of solar collectors[J]. Journal of solar energy engineering, 1983, 105(2): 163-167.
[15] ESKILSON P.Thermal analysis of heat extraction boreholes[D]. Sweden: Lund University, 1987: 58-69.
[16] 彭冬根, 李寅蒂. 基于TRNSYS的增加辅助冷却设备的地源热泵系统优化[J]. 南昌大学学报(工科版), 2021, 43(2): 128-136.
PENG D G, LI Y D.Optimization of ground source heat pump system with additional auxiliary cooling equipment based on TRNSYS[J]. Journal of Nanchang University(engineering & technology), 2021, 43(2): 128-136.
[17] 刘耀国. 南昌某土壤源热泵系统工程应用及分析[D]. 南昌: 南昌大学, 2010: 33-35.
LIU Y G.Engineering applications and analysis of ground source heat pump system in Nanchang[D]. Nanchang:Nanchang University, 2010, 33-35.
[18] HAN Z W, JU X M, MA X, et al.Simulation of the performance of a hybrid ground-coupled heat pump system on the basis of wet bulb temperature control[J]. Applied thermal engineering, 2016, 108: 980-988.
[19] 黄祖胜. 重庆地区办公建筑数码涡旋多联机空调系统与传统空调系统能耗分析研究[D]. 重庆: 重庆大学, 2014.
HUANG Z S.Office buildings’ energy consumption analysis of digital scroll multi-connected unit air conditioning systems and conventional air conditioning systems in the chongqing region[D]. Chongqing: Chongqing University, 2014.