EXPERIMENTAL STUDY ON PERFORMANCE OF EARTH-AIR HEAT EXCHANGER SYSTEM IN COLD REGION OF NORTHWEST CHINA

Zhang Dong; Liu Chunyang; Zhao Kexin; An Zhoujian; Peng Jianming; Zhao Zhouyang

doi:10.19912/j.0254-0096.tynxb.2022-0717

PDF(2275 KB)

Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (9) : 317-325. DOI: 10.19912/j.0254-0096.tynxb.2022-0717

EXPERIMENTAL STUDY ON PERFORMANCE OF EARTH-AIR HEAT EXCHANGER SYSTEM IN COLD REGION OF NORTHWEST CHINA

Zhang Dong^1,2, Liu Chunyang^1,2, Zhao Kexin^1-3, An Zhoujian¹, Peng Jianming⁴, Zhao Zhouyang⁴

Author information +

History +

Abstract

In order to explore the application potential of earth-air heat exchanger technology in the severe cold regions of Northwest China, this paper takes a earth-air heat exchanger system in Lanzhou as the research object, conducts actual measurement of its typical working conditions and analyzes the heat transfer performance and energy-saving effects under different working conditions. The results show that the average temperature of 2.0 m shallow soil in Lanzhou is 17.7 ℃ from June to September in summer. The average temperature from December to march in winter is 4.5 ℃. June, July, December and January have strong heat exchange potential. In Lanzhou, condensed water is not easy to occur in the earth-air heat exchanger system in summer. The outlet fresh air temperature is within the indoor comfortable temperature range, so there is no need for secondary cooling. The change of outlet air temperature and humidity curve of earth-air heat exchanger in winter is more gentle. In December and January, using the earth-air heat exchanger for preheating, the heat pump COP can be increased by 28.1%-30.3%, and the energy consumption can be reduced by 22.0%-23.3%. The simulation results show that the heat transfer efficiency of earth-air heat exchanger system is less affected by regional and seasonal variation.

Key words

earth-air heat exchanger / heat transfer performance / cold region / energy consumption

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

Zhang Dong, Liu Chunyang, Zhao Kexin, An Zhoujian, Peng Jianming, Zhao Zhouyang. EXPERIMENTAL STUDY ON PERFORMANCE OF EARTH-AIR HEAT EXCHANGER SYSTEM IN COLD REGION OF NORTHWEST CHINA[J]. Acta Energiae Solaris Sinica. 2023, 44(9): 317-325 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0717

References

[1] LEKHAL M C, BELARBI R, MOKHTARI A M, et al.Thermal performance of a residential house equipped with a combined system: a direct solar floor and an earth-air heat exchanger[J]. Sustainable cities and society, 2018, 40: 534-545.
[2] BENHAMZA M E, BRIMA A, HOUDA S, et al.Contribution to the study of the reduction of energy consumption through the exchanger coupled conventional air-ground-air conditioner. application to the building[J]. Heat transfer-Asian research, 2017, 46(8): 1104-1118.
[3] VAZ J, SATTLER M A, DAS BRUM R, et al.An experimental study on the use of earth-air heat exchangers (EAHE)[J]. Energy and buildings, 2014, 72: 122-131.
[4] REY-HERNÁNDEZ J, VELASCO-GÓMEZ E, SAN JOSÉ-ALONSO J, et al. Monitoring data study of the performance of renewable energy systems in a near zero energy building in Spain: a case study[J]. Energies, 2018, 11(11): 2979.
[5] CAO S H, LI F, LI X, et al.Feasibility analysis of earth-air heat exchanger (EAHE) in a sports and culture center in Tianjin, China[J]. Case studies in thermal engineering, 2021, 26: 101054.
[6] ZHAO Y J, LI R Y, JI C F, et al.Parametric study and design of an earth-air heat exchanger using model experiment for memorial heating and cooling[J]. Applied thermal engineering, 2019, 148: 838-845.
[7] YUSOF T M, IBRAHIM H, AZMI W H, et al.Thermal analysis of earth-to-air heat exchanger using laboratory simulator[J]. Applied thermal engineering, 2018, 134: 130-140.
[8] NIU F X, YU Y B, YU D H, et al.Heat and mass transfer performance analysis and cooling capacity prediction of earth to air heat exchanger[J]. Applied energy, 2015, 137: 211-221.
[9] SINGH B, KUMAR R, ASATI A K.Influence of parameters on performance of earth air heat exchanger in hot-dry climate[J]. Journal of mechanical science and technology, 2018, 32(11): 5457-5463.
[10] AGRAWAL K K, MISRA R, DAS AGRAWAL G.To study the effect of different parameters on the thermal performance of ground-air heat exchanger system: in situ measurement[J]. Renewable energy, 2020, 146: 2070-2083.
[11] SAKHRI N, MENNI Y, AMEUR H.Effect of the pipe material and burying depth on the thermal efficiency of earth-to-air heat exchangers[J]. Case studies in chemical and environmental engineering, 2020, 2: 100013.
[12] QI D, LI A G, LI S X, et al.Comparative analysis of earth to air heat exchanger configurations based on uniformity and thermal performance[J]. Applied thermal engineering, 2021, 183: 116152.
[13] CUNY M, LIN J, SIROUX M, et al.Influence of an improved surrounding soil on the energy performance and the design length of earth-air heat exchanger[J]. Applied thermal engineering, 2019, 162: 114320.
[14] TASDELEN F, DAGTEKIN I.A numerical investigation of thermal performance of earth-air heat exchanger[J]. Arabian journal for science and engineering, 2019, 44(2): 1151-1163.
[15] DASILVA BRUM R, VAZ J, OLIVEIRA ROCHA L A D, et al. A new computational modeling to predict the behavior of earth-air heat exchangers[J]. Energy and buildings, 2013, 64: 395-402.
[16] BANSAL V, MISRA R, DAS AGRAWAL G D, et al. Performance analysis of earth-pipe-air heat exchanger for summer cooling[J]. Energy and buildings, 2010, 42(5): 645-648.
[17] BENHAMMOU M, DRAOUI B.Parametric study on thermal performance of earth-to-air heat exchanger used for cooling of buildings[J]. Renewable and sustainable energy reviews, 2015, 44: 348-355.
[18] AHMED S F, AMANULLAH M T D, KHAN M M K, et al. Parametric study on thermal performance of horizontal earth pipe cooling system in summer[J]. Energy conversion and management, 2016, 114: 324-337.
[19] CHIESA G, ZAJCH A.Geo-climatic applicability of earth-to-air heat exchangers in North America[J]. Energy and buildings, 2019, 202: 109332.
[20] ZAJCH A, GOUGH W A.Seasonal sensitivity to atmospheric and ground surface temperature changes of an open earth-air heat exchanger in canadian climates[J]. Geothermics, 2021, 89: 101914.
[21] AHMED S F, KHAN M M K, AMANULLAH M T O, et al. A parametric analysis of the cooling performance of vertical earth-air heat exchanger in a subtropical climate[J]. Renewable energy, 2021, 172(4): 350-367.
[22] 王启山. 常见温度下饱和水蒸汽分压力的计算[J]. 天津理工学院学报, 1986, 2(2): 40-43.
WANG Q S.Calculation of partial pressure of saturated water vapor at common temperature[J]. Journal of Tianjin University of Technology, 1986, 2(2): 40-43.
[23] GB 19577—2015, 冷水机组能效限定值及能效等级[S].
GB 19577—2015, Minimum allowable values of energy efficiency and energy efficiency grades for water chillers[S].
[24] 张东, 李金平, 刘伟, 等. 喷气增焓空气源热泵热性能评价及预测[J]. 化工学报, 2014, 65(12): 5004-5009.
ZHANG D, LI J P, LIU W, et al.Thermal performance evaluation and prediction of enhanced vapor injection air source heat pump[J]. CIESC journal, 2014, 65(12): 5004-5009.
[25] 赵霄强, 刘智勇, 闫丹丽, 等. 兰州地区土壤热物性参数计算及垂直U型管非稳态温度场模拟[J]. 兰州交通大学学报, 2015, 34(1): 146-150.
ZHAO X Q, LIU Z Y, YAN D L, et al.Thermophysical property calculation of soil and numeric simulation of unsteady temperature field of U-vertical buried pipe in Lanzhou Area[J]. Journal of Lanzhou Jiaotong University, 2015, 34(1): 146-150.
[26] 官燕玲, 张小刚, 梁草茹, 等. 西安地区土壤源热泵地埋管换热的岩土影响因素区域分布[J]. 西北大学学报(自然科学版), 2016, 46(4): 565-572.
GUAN Y L, ZHA G X G, LIANG C R, et al. Regional distribution of rock-soil influences for ground heat exchange of ground-source heat pump in Xi’an Area[J]. Journal of Northwest University (natural science edition), 2016, 46(4): 565-572.
[27] 杨超. 银川地区浅层地温能资源综合评价研究[D]. 西安: 长安大学, 2017.
YANG C.Research on the comprehensive evaluation of shallow geothermal energy resource in Yinchuan[D]. Xi’an: Chang’an University, 2017.