RESEARCH ON SEASONAL THERMAL STORAGE CHARACTERISTICS OF SOLAR-GROUND SOURCE HEAT PUMP SYSTEM IN SUNLIGHT GREENHOUSES

Wang Jianqiang; Yang Peilin; Bao Lingling

doi:10.19912/j.0254-0096.tynxb.2024-0841

PDF(1958 KB)

Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (9) : 254-262. DOI: 10.19912/j.0254-0096.tynxb.2024-0841

RESEARCH ON SEASONAL THERMAL STORAGE CHARACTERISTICS OF SOLAR-GROUND SOURCE HEAT PUMP SYSTEM IN SUNLIGHT GREENHOUSES

Wang Jianqiang¹, Yang Peilin², Bao Lingling^1,2

Author information +

History +

Abstract

To effectively address the issues of soil temperature decreasing annually in ground source heat pump （GSHP） systems and excessive soil temperature in summer caused by solar-assisted ground source heat pump （SAGSHP） systems in solar greenhouses, this paper proposes a cross-seasonal partitioned thermal storage mode for SAGSHP systems. The buried pipes are divided into four zones, and TRNSYS-18 simulation is used to model different seasonal operation modes, leading to the optimal partitioned thermal storage strategy. Results show that the optimal mode involves connecting half of the solar thermal storage during the spring transition and cooling seasons, and the entire area during the autumn transition and heating seasons. Additionally, during the autumn transition season, half of the zone provide heating or cooling, while the entire area is used for heating or cooling during other periods. In this optimal mode, soil temperature remains stable over ten years, the Coefficient of Performance（C_OP） decrease in summer is minimized, and the system's operational stability is higher than traditional SAGSHP systems. Over ten years, the System Coefficient of Performance （S_COP） is on average 57% higher than GSHP systems and 5.4% higher than that of traditional SAGSHP systems. In the tenth year, the S_COP is 70.6% higher than GSHP systems and 10.4% higher than that of traditional SAGSHP systems. This study provides a reliable strategy for the efficient and stable operation of greenhouse GSHP systems.

Key words

solar energy / greenhouse / heat storage / ground source heat pumps / ground buried pipe zoning / system design

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

Wang Jianqiang, Yang Peilin, Bao Lingling. RESEARCH ON SEASONAL THERMAL STORAGE CHARACTERISTICS OF SOLAR-GROUND SOURCE HEAT PUMP SYSTEM IN SUNLIGHT GREENHOUSES[J]. Acta Energiae Solaris Sinica. 2025, 46(9): 254-262 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0841

References

[1] REES S J.An introduction to ground-source heat pump technology[M]. Advances in Ground-Source Heat Pump Systems, woodhead publishing, 2016: 1-25.
[2] 王强, 杨禹尧, 夏礼如, 等. 热泵技术在温室中的应用[J]. 中国农学通报, 2020, 36(29): 139-144.
WANG Q, YANG Y Y, XIA L R, et al.Application of heat pump technology in greenhouse[J]. Chinese agricultural science bulletin, 2020, 36(29): 139-144.
[3] NOURI G, NOOROLLAHI Y, YOUSEFI H.Solar assisted ground source heat pump systems—a review[J]. Applied thermal engineering, 2019, 163: 114351.
[4] FINE J P, NGUYEN H V, FRIEDMAN J, et al.A simplified ground thermal response model for analyzing solar-assisted ground source heat pump systems[J]. Energy conversion and management, 2018, 165: 276-290.
[5] SEO Y, SEO U J.Ground source heat pump(GSHP) systems for horticulture greenhouses adjacent to highway interchanges: a case study in South Korea[J]. Renewable and sustainable energy reviews, 2021, 135: 110194.
[6] MEHRPOOYA M, HEMMATABADY H, AHMADI M H.Optimization of performance of combined solar collector-geothermal heat pump systems to supply thermal load needed for heating greenhouses[J]. Energy conversion and management, 2015, 97: 382-392.
[7] 李新国, 胡晓辰, 王健. 太阳能、蓄热与地源热泵组合系统能量分析与实验[J]. 太阳能学报, 2012, 33(4): 640-646.
LI X G, HU X C, WANG J.Energy analyses and experiment on solar-ground coupled heat pump with seasonal storage system[J]. Acta energiae solaris sinica, 2012, 33(4): 640-646.
[8] 刘仙萍, 田东, 雷豫豪, 等. 光伏/光热-地源热泵联合供热系统运行性能研究[J]. 太阳能学报, 2022, 43(9): 88-97.
LIU X P, TIAN D, LEI Y H, et al.Performance analysis for solar photovoltaic/thermal-ground source heat pump hybrid heating system[J]. Acta energiae solaris sinica, 2022, 43(9): 88-97.
[9] 沈海笑, 王恩宇, 沈云祥, 等. 双地埋管群太阳能-地源热泵系统耦合方式研究[J]. 太阳能学报, 2020, 41(10): 361-368.
SHEN H X, WANG E Y, SHEN Y X, et al.Study on coupling methods of solar-ground source heat pump system with double buried pipe groups[J]. Acta energiae solaris sinica, 2020, 41(10): 361-368.
[10] 刘艳峰, 宋梦瑶, 周勇, 等. 分区串并联式太阳能-地源热泵跨季节蓄热组合系统性能研究[J]. 太阳能学报, 2021, 42(12): 71-79.
LIU Y F, SONG M Y, ZHOU Y, et al.Research on performance of subarea series-parallel solar assisted ground source heat pump system[J]. Acta energiae solaris sinica, 2021, 42(12): 71-79.
[11] 刘冲. 盆栽花卉四季养护管理技术[J]. 现代园艺, 2017(22): 35.
LIU C.Four-season maintenance and management technology of potted flowers[J]. Xiandai horticulture, 2017(22): 35.
[12] YUAN W Q, JI J, MODJINOU M, et al.Numerical simulation and experimental validation of the solar photovoltaic/thermal system with phase change material[J]. Applied energy, 2018, 232: 715-727.
[13] 张慧智, 史学正, 于东升, 等. 中国土壤温度的季节性变化及其区域分异研究[J]. 土壤学报, 2009, 46(2): 227-234.
ZHANG H Z, SHI X Z, YU D S, et al.Seasonal and regional variations of soil temperature in China[J]. Acta pedologica sinica, 2009, 46(2): 227-234.
[14] GB 50364—2005, 民用建筑太阳能热水系统应用技术规范[S].
GB 50364—2005, Technical code for solar water heating system of civil building[S].