This study investigates annual performance of the hybrid energy system with geothermal and solar heat sources for hot water, heating and cooling of a residential house in South Korea. A small-scale hybrid-renewable energy system (H-RES) consists of a geothermal heat pump for heating and cooling, solar collectors for hot water, a gas fired backup boiler, and incidental facilities. All pipelines are designed for heat flow between the modules such as storage tank, heat production units, and radiators. Also, all systems automatically operated by the integrated sensing and control system. The average coefficient of performance of geothermal module during cooling and heating seasons is evaluated as about 4.1 and 3.5, respectively. Solar fraction for hot water is calculated as over 54%. And annual energy consumption of the H-RES is estimated as much as about 40% of conventional energy systems.

Issue Section:
Research Papers
Keywords:
geothermal heat pump, COP, solar fraction, hybrid-renewable energy system
Topics:
Geothermal engineering, Heat pumps, Solar energy, Cooling, Hot water, Heat exchangers, Heating, Heating and cooling, Heat, Energy consumption, Solar heating

References

1.
Kavanaugh
,
S. P.
, and
Raffery
,
K.
,
1997
, “
Ground-Source Heat Pumps: Design of Geothermal Systems for Commercial and Institutional Buildings
,”
ASHRAE
,
Atlanta, GA
.
2.
Healy
,
P. F.
, and
Ugursal
,
V. I.
,
1997
, “
Performance and Economic Feasibility of Ground Source Heat Pumps in Cold Climate
,”
Int. J. Energy Res.
,
21
, pp.
857
–
870
.10.1002/(SICI)1099-114X(199708)21:10<857::AID-ER279>3.0.CO;2-1
Google Scholar
Crossref
Search ADS
 
3.
Ozgener
,
O.
, and
Hepbasli
,
A.
,
2005
, “
Experimental Investigation of the Performance of a Solar-Assisted Ground-Source Heat Pump System for Greenhouse Heating
,”
Int. J. Energy Res.
,
29
, pp.
217
–
231
.10.1002/er.1049
Google Scholar
Crossref
Search ADS
 
4.
Kuang
,
Y. H.
,
Wang
,
R. Z.
, and
Yu
,
L. Q.
,
2003
, “
Experimental Study on Solar Assisted Heat Pump System for Heating Supply
,”
Energy Convers. Manage.
,
44
, pp.
1089
–
1098
.10.1016/S0196-8904(02)00110-3
Google Scholar
Crossref
Search ADS
 
5.
Bi
,
Y.
,
Guo
,
T.
,
Zhang
,
L.
, and
Chen
,
L.
,
2004
, “
Solar and Ground Source Heat Pump System
,”
Appl. Energy
,
78
(
2
), pp.
231
–
245
.10.1016/j.apenergy.2003.08.004
Google Scholar
Crossref
Search ADS
 
6.
Kaygusuz
,
K.
,
1999
, “
Investigation of a Combined Solar-Heat Pump System for Residential Heating. Part 1: Experimental Results
,”
Int. J. Energy Res.
,
23
, pp.
1213
–
1223
.10.1002/(SICI)1099-114X(199911)23:14<1213::AID-ER546>3.0.CO;2-G
Google Scholar
Crossref
Search ADS
 
7.
Lee
,
Y. K.
, and
Hwang
,
I. J.
,
2003
, “
A Study on the Operating Performance of Solar Assisted Hot Water System for Apartment Houses
,”
Korean J. Air-Conditioning Refrigeration Eng.
,
15
(
11
), pp.
928
–
936
.
8.
Hollands
,
K. G. T.
, and
Lightstone
,
M. F.
,
1989
, “
A Review of Low-Flow, Stratified-Tank Solar Water Heating System
,”
Sol. Energy
,
43
(
2
), pp.
97
–
105
.10.1016/0038-092X(89)90151-5
Google Scholar
Crossref
Search ADS
 
9.
Sanner
,
B.
,
1995
, “
Earth Heat Pumps and Underground Thermal Energy Storage in Germany
,”
Proceedings of the World Geothermal Congress
, Vol. 3,
Florenca, Italy
, May 18–31, pp.
1167
–
1172
.
10.
Kim
,
J. H.
,
Shin
,
U. C.
,
Baek
,
N. C.
, and
Jang
,
M. S.
,
2004
, “
Thermal Performance of Solar Space Heating and Hot Water System in an Apartment
,”
Proceeding of the Korean Solar Energy Society, Spring Annual Conference
, pp.
98
–
102
.
Copyright © 2013 by ASME
You do not currently have access to this content.