A control method for increasing the heat usage efficiency of nearly-zero-energy buildings with heat pumps
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Kuupäev
2020
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Abstrakt
In the retrofitting of older buildings with central heating into nearly zero-energy buildings
more and more air to water heat pumps are used. These heat pumps are normally connected to
heating systems, producing heat only on demand. The greatest demand for heat occurs when the
outside temperature and therefore the COP of the pump is lowest. Outside temperature varies
during the day, meaning it is possible to save energy by producing and storing heat in a situation
where the COP is higher. To determine the periods with higher COP values weather forecast data
and COP curves are used. The data enables to rank and select time periods for heat production.
This in conjunction with the heat demand curve of the building enables to create an operation
schedule for the heat pump. The aim of the study is to develop heat pump control methods for
renovated buildings to comply with nearly zero energy building codes. Dependant on the heat
pump and weather conditions, up to 10 % of the electricity demand for heating can be decreased.
Kirjeldus
Märksõnad
heat demand modelling, heat production scheduling, heating season, optimization, temperature fluctuations, articles