Abstract

This paper discusses one of the most effective systems for domestic hot water (DHW) production based on air-source heat pump with an integrated tank. The operating principle of the heat pump is described in detail. Moreover, there is an account of experimental set-up and results of the measurements. In the experimental part, measurements were conducted with the aim of determining the energy parameters and measures of the economic efficiency related to the presented solution. The measurements that were conducted are based on the tapping cycle that is similar to the recommended one in EN-16147 standard. The efficiency of the air source heat pump during the duration of the experiment was 2.43. In the end of paper, authors conducted a simplified ecological analysis in order to determine the influence of operation of air-source heat pump with integrated tank on the environment. Moreover the compression with the different source of energy (gas boiler with closed combustion chamber and boiler fired by the coal) was conducted. The heat pump is the ecological friendly source of the energy.

Highlights

  • Renewable energy sources are becoming more common as a result of the increasing social awareness of the issues related to the conservation of the environment

  • The use of energy needed for production of domestic hot water forms a considerable proportion in the overall energy balance; it is equal to 18 % in the USA [2], 20% in Brazil [3], 25% in the UK [4], 26% in Spain [5] and 30% in Australia [6]

  • Such a huge relative portion in the energy use in the housing sector leads to continuous attempts aimed at increasing the energy efficiency of equipment and heating systems, whose role is concerned with heating households and production of domestic hot water

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Summary

Introduction

Renewable energy sources are becoming more common as a result of the increasing social awareness of the issues related to the conservation of the environment. For the case of heat pumps, whose role is limited to the production of domestic hot water, the largest proportion of units apply atmospheric air to play the role of the lower heat source. In this case, we call them air heat pumps. The thermal efficiency of air heat pumps applied for the production of domestic how water is determined by a number of factors such as: course of tapping cycle, ambient temperature, temperature of cold water entering the pump, temperature of hot water in the storage tank, etc. Other studies suggest that the adequate selection of the capacity of the water tank forms an important design consideration

Description of the system
Tapping cycles
Test results
Findings
Conclusions

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