Accounting for “Zero Curtain” Effect in GSHP Simulation


Article Preview

This paper contains the results of research, carried out with financial support from the Ministry of Education and Science of the Russian Federation (contract ID RFMEFI57914X0026). For the ground source heat pump (GSHP) used as a heating system in regions with cold climate the thermal effects of ground moisture freezing-melting processes can make an essential long-term impact on GSHP performance. However, widely known models of heat transfer inside and outside GSHP borehole do not take into account such effects. In this paper, we propose a method of engineering estimation of freezing-melting latent heat in the frame of modified cylindrical source model. The key feature of the method is the definition of effective thermal conductivity of ground to "convert" the latent heat of phase transition into equivalent heat flux from outer ground. The method is validated by laboratory measurements of ground thermal conductivity during the freezing-melting process.



Edited by:

He Rui, Puneet Tandon and Teresa T. Zhang




G.P. Vasilyev et al., "Accounting for “Zero Curtain” Effect in GSHP Simulation", Applied Mechanics and Materials, Vol. 664, pp. 243-249, 2014

Online since:

October 2014




* - Corresponding Author

[1] Omar A.M. Ground-source heat pumps systems and applications. Renewable and Sustainable Energy Reviews, 12 (2008) 344–371.

[2] Lund J.W., Freeston D.H., Boyd T.L. Direct utilization of geothermal energy 2010 worldwide review. Geothermics, 40 (2011) 159-180.


[3] Lohani S.P., Schmidt D. Comparison of energy and exergy analysis of fossil plant, ground and air source heat pump building heating system. Renewable Energy, 35 (2010) 1275-1282.


[4] Sarbu I., Sebarchievici C. General review of ground-source heat pump systems for heating and cooling of buildings. Energy and Buildings, 70 (2014) 441-454.


[5] Penrod E. B, Prasanna D.V. Design of flat-plate collector for solar earth heat pump. Solar Energy 6 (1962) 9–22.


[6] Ozgener O., Hepbasli A. Performance analysis of a solar assisted ground-source heat pump system for greenhouse heating: an experimental study, Building and Environment 40 (8) (2005) 1040-1050.


[7] Wu W., Wang B., You T., Shi W., Li X. A potential solution for thermal imbalance of ground source heat pump systems in cold regions: Ground source absorption heat pump. Renewable Energy, 59 (2013) 39-48.


[8] Florides G., Kalogirou S. Ground heat exchangers - A review of systems, models and applications. Renewable Energy, 32 (2007) 2461–2478.


[9] Yang H., Cui P., Fang Z. Vertical-borehole ground-coupled heat pumps: A review of models and systems, Applied Energy, 87 (2010) 16-27.


[10] Lamarche L., Kajl S., Beauchamp B. A review of methods to evaluate borehole thermal resistances in geothermal heat-pump systems. Geothermics, 39 (2010) 187-200.


[11] Yuan Y., Cao X., Sun L., Lei B., Yu N. Ground source heat pump system: A review of simulation in China. Renewable and Sustainable Energy Reviews, 16 (2012) 6814–6822.


[12] Vasiliev G.P. Geothermal heat pump heating systems and its operating efficiency in climate conditions of Russia (Geotermalnyie teplonasosnyie sistemy i effektivnost' ih primeneniya v klimaticheskih usloviyah Rossii). / AVOK - 2007. - n. 5. – pp.58-68.

Fetching data from Crossref.
This may take some time to load.