Abstract
Heat pumps are classified as ecologically friendly heat-generating devices and are one of the most suitable solutions for improving energy efficiency in buildings. Systems based on such solutions replace conventional sources very well. Household sector is one of the major energy consumers, where energy is used mainly for space heating and providing hot water. To increase renewable energy consumption levels, it is necessary to take decisive actions aimed at energy modernization of existing buildings. Particular emphasis must be put on the use of renewable energy sources. A wide selection of insulation materials is available on the market, however proper technologies are required to apply those materials, especially for historical buildings. Therefore, while planning investment, a question must be answered what type of material should be used, and what costs that will generate. The paper presents simple methodology for calculating the optimal insulation thickness so that the costs of the thermo-modernization would be covered by savings in heating expenses, when bank loan for the project is available at fixed interest rate.
Highlights
In the 21st century, communities have to face different threats that result from a carefree attitude to the use of natural resources in the last century
To a far extent that refers to over-exploitation of conventional energy sources, which directly leads to the natural environment deterioration
The value is equal to approx. 6.3 cm
Summary
In the 21st century, communities have to face different threats that result from a carefree attitude to the use of natural resources in the last century. In Poland, heat is mainly used for space heating purposes, domestic hot water and air conditioning This represents more than 31% of total energy consumption. Air-to-water type heat pumps are suitable as a replacement of heating devices in energy upgrading of buildings [6]. They are easy to install and integrate into existing heating systems. It is necessary to select an appropriate heating scheme that would provide desirable indoor climatic conditions [20], and account for the thermal properties of the material used for thermal upgrading [21]. The paper discusses simulation investigations into heat demand when the building is heated by an air-source heat pump
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