THERMAL SCIENCE

International Scientific Journal

Zhao Hou

,

Yuqiu Hu

,

Xiaojie Liu

,

Jianhua Wang

,

Mei Yang

,

Jun Fan

NUMERICAL INVESTIGATION ON FREE COOLING PERFORMANCE OF GROUND-SOURCE HEAT PUMP IN A SOLAR GREENHOUSE

ABSTRACT
This paper presents the numerical study of a ground source heat pump with borehole free cooling in a solar greenhouse. The system is mainly composed of a solar greenhouse with a water-water heat pump, a ground heat exchanger, and several pipes for free cooling. Thermal performances of ground source heat pump with and without borehole free cooling are investigated. The cooling time of the solar greenhouse is divided into transitional seasons (May and September) and summer seasons (from June to August). The mixed mode, including the free cooling mode and the ground source heat pump cooling mode, runs in summer seasons. During the entire transition seasons, the free cooling mode consumes 33.6% of the electricity in the ground source heat pump cooling mode and the soil thermal storage in free cooling mode is 76.3% of that in ground source heat pump cooling mode. Throughout the summer seasons, the power consumption of the mixed mode is 4.3% lower than that of the ground source heat pump cooling mode, and mixed mode soil thermal storage is 19.5% lower than that of ground source heat pump cooling mode. The results indicate that borehole free cooling system has better energy-saving performance during whole cooling period. In addition, a borehole free cooling system can also reduce the thermal imbalance in the soil.
KEYWORDS
Ground Source Heat Pump (GSHP), Borehole Free Cooling, Solar Greenhouse, energy plus
PAPER SUBMITTED: 2022-12-03
PAPER REVISED: 2023-07-10
PAPER ACCEPTED: 2023-07-13
PUBLISHED ONLINE: 2023-08-05
DOI REFERENCE: https://doi.org/10.2298/TSCI221203161H
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2023, VOLUME 27, ISSUE Issue 6, PAGES [4719 - 4732]
REFERENCES
  1. Zhang, M., et al., Energy-saving Design and Control strategy Towards Modern Sustainable Greenhouse: A Review, Renewable and Sustainable Energy Reviews, 164 (2022), 112602
  2. Saeidi, R., et al., Numerical Simulation of a Novel Spiral Type Ground Heat Exchanger for Enhancing Heat Transfer Performance of Geothermal Heat Pump, Energy Conversion and Management, 168 (2018), July, pp. 296-307
  3. Wu, W., Skye, H. M., Progress in Ground-Source Heat Pumps Using Natural Refrigerants, International Journal of Refrigeration, 92 (2018), Aug., pp. 70-85
  4. Ruoping, Y., et al., Performance Study of Split Type Ground Source Heat Pump Systems Combining with Solar Photovoltaic-Thermal Modules for Rural Households In North China, Energy and Buildings, 249 (2021), 111190
  5. Wang, X., et al., Simulation-Based Analysis of a Ground Source Heat Pump System Using Super-Long Flexible Heat Pipes Coupled Borehole Heat Exchanger During Heating Season, Energy Conversion and Management, 164 (2018), May, pp. 132-143
  6. Yousefi, H., et al., Assessment and Deployment of Ground Source Heat Pump for Air Pollution Reduction in Tehran, Iran, Environmental Energy and Economic Research, 1. (2017), 3, pp. 269-278
  7. Wang, X., et al., China's CO2 Regional Synergistic Emission Reduction: Killing Two Birds with One Stone?, Energy Policy, 168 (2022), 113149
  8. Lund, J. W., Toth, A. N., Direct Utilization of Geothermal Energy 2020 Worldwide Review, Geothermics, 90 (2021), 101915
  9. Boughanmi, H., et al., A Performance of a Heat Pump System Connected a New Conic Helicoidal Geothermal Heat Exchanger for a Greenhouse Heating in the North of Tunisia, Solar Energy, 171 (2018), Sept., pp. 343-353
  10. Chiriboga, G., et al., Harnessing of Geothermal Energy for a Greenhouse in Ecuador Employing a Heat Pump: Design, Construction, and feasibility Assessment, Heliyon, 7 (2021), 12, e08608
  11. Zuquim, M.de P. S., Zarrouk, S. J., Nursery Greenhouses Heated with Geothermal Energy - A Case Study from Rotorua New Zealand, Geothermics, 95 (2021), 102123
  12. Qiao, Z., et al., Performance Assessment of Ground-Source Heat Pumps (GSHPs) in the Southwestern and Northwestern China: In Situ Measurement, Renewable Energy, 153 (2020), June, pp. 214-227
  13. Seo, Y., U.-J. Seo, U.-J., Ground Source Heat Pump (GSHP) Systems for Horticulture Greenhouses Adjacent to Highway Interchanges: A Case Study in South Korea, Renewable and Sustainable Energy Reviews, 135 (2021), 110194
  14. Awani, S., et al., Performance of the Coupling of the Flat Plate Collector and a Heat Pump System Associated with a Vertical Heat Exchanger for Heating of the Two Types of Greenhouses System, Energy Conversion and Management, 103 (2015), Oct., pp. 266-275
  15. Yousefi, H., et al., Feasibility Study and Economical Evaluations of Geothermal Heat Pumps in Iran, Geothermics, 72 (2018), Mar., pp. 64-73
  16. Spitler, J. D., Gehlin, S., Measured Performance of a Mixed-Use Commercial-Building Ground Source Heat Pump System in Sweden, Energies, 12 (2019), 10, 2020
  17. Wu, W., et al., Evaluation of Ground Source Absorption Heat Pumps Combined with Borehole Free Cooling, Energy Conversion and Management, 79 (2014), Mar., pp. 334-343
  18. Zhou, Z., et al., The Energy-Saving Effects of Ground-Coupled Heat Pump System Integrated with Borehole Free Cooling: A Study in China, Applied Energy, 182 (2016), Nov., pp. 9-19
  19. Yuan, T., et al., Thermodynamic and Economic Analysis for Ground-Source Heat Pump System Coupled with Borehole Free Cooling, Energy and Buildings, 155 (2017), Nov., pp. 185-197
  20. Wang, X., et al., Experimental Study of a Solar-Assisted Ground-Coupled Heat Pump System with Solar Seasonal Thermal Storage in Severe Cold Areas, Energy and Buildings, 42 (2010), 11, pp. 2104-2110
  21. Xu, L., et al., Structure Optimization Design of Ground Heat Exchanger by Topology Method to Mitigate the Geothermal Imbalance, Applied Thermal Engineering, 170 (2020), 115023
  22. Pu, L., et al., Structure Optimization for Horizontal Ground Heat Exchanger, Applied Thermal Engineering, 136 (2018), May, pp. 131-140
  23. Xu, L., et al., Hybrid Ground Source Heat Pump System for Overcoming Soil Thermal Imbalance: A Review, Sustainable Energy Technologies and Assessments, 44 (2021), 101098
  24. Anifantis, A. S., et al., Thermal Energy Assessment of a Small Scale Photovoltaic, Hydrogen and Geothermal Stand-Alone System for Greenhouse Heating, Renewable Energy, 103 (2017), Apr., pp. 115-127
  25. Pu, L., et al., A Novel Tree-Shaped Ground Heat Exchanger for GSHPs in Severely Cold Regions, Applied Thermal Engineering, 146 (2019), Jan., pp. 278-287
  26. Lee, M., et al., Performance Improvement of Solar-Assisted Ground-Source Heat Pumps with Parallelly Connected Heat Sources in Heating-Dominated Areas, Energy, 240 (2022), 122807
  27. Puttige, A. R., et al., Modeling and Optimization of Hybrid Ground Source Heat Pump with District Heating and Cooling, Energy and Buildings, 264 (2022), 112065
  28. Wan, H., et al., Development of a Wet-bulb Temperature-based Heat Balance Control Method for a Hybrid Ground Source Heat Pump System, Procedia Engineering, 205 (2017), Dec., pp. 3251-3258
  29. Zhou, K., et al., Thermal and Economic Performance of Horizontal Ground Source Heat Pump Systems with Different Flowrate Control Methods, Journal of Building Engineering, 53 (2022), 104554
  30. Banakar, A., et al., Energy Analysis and Assessing Heating and Cooling Demands of Closed Greenhouse in Iran, Thermal Science and Engineering Progress, 25 (2021), 101042
  31. Ahamed, M. S., et al., Modeling Heating Demands in a Chinese-style solar Greenhouse Using the Transient Building Energy Simulation Model TRNSYS, Journal of Building Engineering, 29 (2020), 101114
  32. Asa'd, O., et al., Investigation of the Energetic Performance of an Attached Solar Greenhouse Through Monitoring and Simulation, Energy for Sustainable Development, 53 (2019), Dec., pp. 15-29
  33. Pakari, A., Ghani, S., Regression Equation for Estimating the Maximum Cooling Load of a Greenhouse, Solar Energy, 237 (2022), May, pp. 231-238
  34. Ouazzani Chahidi, L., et al., Greenhouse Cultivation in Mediterranean Climate: Dynamic Energy Analysis and Experimental Validation, Thermal Science and Engineering Progress, 26 (2021), 101102
PDF VERSION [DOWNLOAD]
Numerical investigation on free cooling performance of ground-source heat pump in a solar greenhouse

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence