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Title: Thermodynamic analysis of a novel space heating system featuring Hot Gas Water (HGW) technology
Authors: Reykers, Robbe ×
Keersmaekers, Raf #
Ozalp, Nesrin #
Collaert, Johan #
Issue Date: Mar-2016
Publisher: American Society of Mechanical Engineers
Series Title: Journal of Energy Resources Technology vol:138 issue:May pages:0320051-03200511
Abstract: Low operating cost, comfort, sustainability, and environmental footprint are the key elements
of robust space heating (SH) system. In quest for higher efficiencies, it is not
always possible to meet all of these demands where environmental footprint often gets
secondary attention. This paper presents a novel SH system which is capable of meeting
all of the aforementioned elements while simultaneously proving SH and domestic hot
water (DHW). The system comprises a geothermal sourced heat pump (HP) featuring
“hot gas water” (HGW) technology which delivers higher efficiency. This paper gives a
thorough thermodynamic assessment of the system covering component based first
and second law analysis and provides test results based on two case studies at a house
(W10/W35) and a renovated building (W10/W45). The results show that a theoretical efficiency
gain by 11.02% is achievable where the source temperature is 10 C and the water
temperature for floor heating is 35 C. For the same system, with the same source temperature
but with a supply temperature of 45 C for SH, an efficiency gain of 17.91% is
achievable. From experimental testing of the system using the test stand at GeoTherma,
4.73% efficiency gain with water temperature of 35 C and 3.59% efficiency gain with
water temperature of 45 C were obtained. Economic analysis results showed that savings
of up to 10% on an annual basis is possible with HGW technology installed in an
average family house, whereas it gets 4.36% for a small hotel with a payback time period
of about 9 yrs. [DOI: 10.1115/1.4032770]
ISSN: 0195-0738
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Mechanical Engineering Technology TC, Technology Campus De Nayer Sint-Katelijne-Waver
Technologiecluster Werktuigkundige Industriële Ingenieurstechnieken
× corresponding author
# (joint) last author

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