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Optimization of systems with the combination of ground-source heat pump and solar collectors in dwellings

Kjellsson, Elisabeth LU ; Hellström, Göran LU and Perers, Bengt (2010) 7th International Conference on Sustainable Energy Technologies In Energy 35(6). p.2667-2673
Abstract
The use of ground-source heat pumps for heating and domestic hot water in dwellings is common in Sweden. The combination with solar collectors has been introduced to reduce the electricity demand in the system. In order to analyze different systems with combinations of solar collectors and ground-source heat pumps, computer simulations have been carried out with the simulation program TRNSYS. Large differences were found between the system alternatives. The optimal design is when solar heat produces domestic hot water during summertime and recharges the borehole during wintertime. The advantage is related to the rate of heat extraction from the borehole as well as the overall design of the system. The demand of electricity may increase... (More)
The use of ground-source heat pumps for heating and domestic hot water in dwellings is common in Sweden. The combination with solar collectors has been introduced to reduce the electricity demand in the system. In order to analyze different systems with combinations of solar collectors and ground-source heat pumps, computer simulations have been carried out with the simulation program TRNSYS. Large differences were found between the system alternatives. The optimal design is when solar heat produces domestic hot water during summertime and recharges the borehole during wintertime. The advantage is related to the rate of heat extraction from the borehole as well as the overall design of the system. The demand of electricity may increase with solar recharging, because of the increased operating time of the circulation pumps. Another advantage with solar heat in combination with heat pumps is when the boreholes or neighbouring installations are drilled so close that they thermally influence each other. This may lead to decreasing temperatures in the ground, which gives decreased performance of the heat pump and increased use of electricity. The net annual heat extraction from the ground is reduced by recharge from solar heat. (C) 2009 Elsevier Ltd. All rights reserved. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Energy efficiency in, Solar collectors, Ground-source heat pump, buildings
in
Energy
volume
35
issue
6
pages
2667 - 2673
publisher
Elsevier
conference name
7th International Conference on Sustainable Energy Technologies
external identifiers
  • wos:000278506400034
  • scopus:77953324430
ISSN
1873-6785
0360-5442
DOI
10.1016/j.energy.2009.04.011
language
English
LU publication?
yes
id
7353b2c8-029b-4b3e-a0fd-6dd05716708c (old id 1631406)
date added to LUP
2010-07-21 12:19:02
date last changed
2018-06-24 03:33:10
@inproceedings{7353b2c8-029b-4b3e-a0fd-6dd05716708c,
  abstract     = {The use of ground-source heat pumps for heating and domestic hot water in dwellings is common in Sweden. The combination with solar collectors has been introduced to reduce the electricity demand in the system. In order to analyze different systems with combinations of solar collectors and ground-source heat pumps, computer simulations have been carried out with the simulation program TRNSYS. Large differences were found between the system alternatives. The optimal design is when solar heat produces domestic hot water during summertime and recharges the borehole during wintertime. The advantage is related to the rate of heat extraction from the borehole as well as the overall design of the system. The demand of electricity may increase with solar recharging, because of the increased operating time of the circulation pumps. Another advantage with solar heat in combination with heat pumps is when the boreholes or neighbouring installations are drilled so close that they thermally influence each other. This may lead to decreasing temperatures in the ground, which gives decreased performance of the heat pump and increased use of electricity. The net annual heat extraction from the ground is reduced by recharge from solar heat. (C) 2009 Elsevier Ltd. All rights reserved.},
  author       = {Kjellsson, Elisabeth and Hellström, Göran and Perers, Bengt},
  booktitle    = {Energy},
  issn         = {1873-6785},
  keyword      = {Energy efficiency in,Solar collectors,Ground-source heat pump,buildings},
  language     = {eng},
  number       = {6},
  pages        = {2667--2673},
  publisher    = {Elsevier},
  title        = {Optimization of systems with the combination of ground-source heat pump and solar collectors in dwellings},
  url          = {http://dx.doi.org/10.1016/j.energy.2009.04.011},
  volume       = {35},
  year         = {2010},
}