Net energy analysis of a solar combi system with Seasonal Thermal Energy Store

Shane Colclough, Teresa McGrath

Research output: Contribution to journalArticlepeer-review

49 Citations (Scopus)


EU targets require nearly zero energy buildings (NZEB) by 2020. However few monitored examples exist of how NZEB has been achieved in practise in individual residential buildings. This paper provides an example of how a low-energy building (built in 2006), has achieved nearly zero energy heating through the addition of a solar domestic hot water and space heating system (“combi system”) with a Seasonal Thermal Energy Store (STES). The paper also presents a cumulative life cycle energy and cumulative life cycle carbon analysis for the installation based on the recorded DHW and space heating demand in addition to energy payback periods and net energy ratios. In addition, the carbon and energy analysis is carried out for four other heating system scenarios including hybrid solar thermal/PV systems in order to obtain the optimal system from a carbon efficiency perspective.
Original languageEnglish
Pages (from-to)611-616
Number of pages6
JournalApplied Energy
Publication statusPublished (in print/issue) - 25 Mar 2015


  • Seasonal Thermal Energy Storage (STES)
  • Passive House
  • Life cycle analysis
  • Net energy ratio


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