Abstract
The article presents an analysis of energy consumption and the cost of its production by the systems of supply of hot water depending on the applied heat sources and destination of a building. The calculations have taken into account the efficiency of the adopted installation solutions that have a direct impact on energy consumption. The following parameters have been determined: the size of the seasonal demand for hot water, an annual amount of fuel needed to its production and annual operating costs. The calculations have been performed for residential buildings and public buildings, whilst maintaining the same usable space. The aim of the article is to determine the rate of the amount of fuel, needed to heat to the desired temperature, a unit volume of water depending on the type of heat source and destination of a premises. For the adopted variants of installation, the ratio of production costs of unit volume of hot water has been also determined. The indicators of the fuel amount and the cost of hot water pointed out in the article may be one of the criteria for selection of an effective system for the preparation of hot water.
Highlights
Due to rising fuel prices, as well as constantly decreasing natural resources, it is essential to manage our deposits consciously and responsibly, as well as use them effectively
There are certain attempts that aim at reducing water consumption, as well as reducing the energy required to heat the hot water through recycling greywater and using heat exchangers DWHR [2, 3]
The selection of the right energy source, which powers the hot, tap water supply system in a building is one of the most important decisions to make for an investor, especially if it relates to large facilities where water consumption is significant
Summary
Due to rising fuel prices, as well as constantly decreasing natural resources, it is essential to manage our deposits consciously and responsibly, as well as use them effectively For this reason, the choice of a proper heating system is extremely important, including a system for the preparation of hot water. The aim of the article is to analyse the energy consumption and the cost of its production in the systems which supply hot water, depending on the applied heat source and the purpose of the building. The scope of the article covers the calculation of the seasonal demand for hot water, the efficiency of the analysed system, the annual amount of fuel necessary for the production of hot water, and the annual operating costs These values have been calculated with the use of the ArCADia-TERMO 6.5 computer software. The indicator of the amount of fuel needed to heat a unit volume of hot water to the desired temperature, as well as the rate of production costs per unit volume of hot water, depending on the type of heat source and the premise’s functions, have been determined
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