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Title:
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Verwarmingsconcepten PZE woning : weinig Joules met weinig installatie
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Author(s):
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Published by:
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Publication date:
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ECN
Energy in the Built Environment
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1-7-2001
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ECN report number:
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Document type:
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ECN-C--00-097
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ECN publication
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Number of pages:
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Full text:
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39
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Download PDF
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Abstract:
In a Passive Solar Home (PSH), the heat demand is minimised by applyinga range of measures, such as a high degree of thermal insulation. In
addition, a PSH uses as much as possible the available solar heat to
fill in the heat demand. With an extremely low remaining heat demand,
the question remains, which type of heating concept is the most suitable.
To answer the question, a PSH and various heating systems are modelled
using the building simulation program TRNSYS Performances of the various
systems were compared on the basis of the Dutch test reference year.
The net yearly heating demand for space heating, appeared to be 2.8
GJ (100 m3 natural gas equivalent at 90% boiler efficiency). The net
yearly heating demand for DHW appeared to be 4.1 GJ (260 m3 natural
gas equivalent at 50% boiler efficiency).
The effect of a number of different heating concepts on the energy demand
was then determined using the TRNSYS model. All heating concepts consist
of a 6 m2 solar collector in combination with a 200 l storage vessel
for DHW supply, a heat recovery unit in the ventilation system and a
heat recovery unit on the shower drain water. The various systems were
compared in terms of exploitation costs (write-off plus interest, maintenance
and energy cost) and CO2-emissions. The systems with a gas fired HE-boiler
and radiators or air heating appeared to have the lowest exploitation
costs. The heat pump system (in combination with floor heating) appeared
to have the highest exploitation costs but the lowest CO2-emissions.
The main deficiency in all concepts appears to be the relatively low
efficiency for generation of DHW. This can be improved by optimising
the volume of the DHW storage vessel and by integrating it with the
solar collector storage vessel.
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