Abstract
Swimming pools are used around the world for recreational, rehabilitation and physical activity. From an energy and environmental standpoint, grey water as a waste thermal potential of swimming pools is a valuable heat source produced continuously in extensive, measurable and large quantities. The main objective of this article is to analyse the feasibility of proposed grey water heat recovery (GWHR) system from the showers and backwater from swimming pool filters for an indoor pool located in recreation centre in Poland. Analysis, calculations and results were obtained and discussions of water and energy consumption were carried out for the mentioned indoor swimming pool on the basis of real measurements case study for water flow rate, water temperature in swimming pools and showers. The results ensure a significant potential of energy savings by using the proposed GWHR system, which allows to reduce the energy demand by 34% up to 67% for pool water preheating and domestic hot water (DHW). The environmental impact of proposed GWHR system was analysed and calculated by using Common Air Quality Index. Environmental results are illustrated and discussed specially for the reduction of CO2, NOX, SOX emissions and dust and ensure a significant reduction of these pollutants in range of 34% to 48%.
Highlights
A recent lifestyle in different countries has a characteristic trend for the vast and intensive use of basins and swimming pools
The water consumption in swimming pools depends on many factors such as: the scale of swimming pools, the range of services in pool buildings and needed indoor conditions; the qualification of the equipment of swimming pools; the water requirements for hygiene and sanitary purposes in indoor swimming pools based on regulations and standards and facilities; the time of single circulation of water in swimming pools, whose amount depends mainly on the type of pools and the number of people using them; water conservation practices, etc. [45,46]
The water requirements for hygiene and sanitary purposes in indoor swimming pools based on regulations and standards do not take into account new technologies and economical fittings; they are higher than the actual water consumption rates
Summary
A recent lifestyle in different countries has a characteristic trend for the vast and intensive use of basins and swimming pools. C—Sports pools: Sport swimming pools, mostly exist without additional recreational facilities, and are mainly used in school, sports halls and health care centres. Health and environmental awareness is growing; the swimming pools must meet the different users’ requirements, such as: necessity and quest for relaxation, sport and fitness, games, fun and entertainment, personal health and hygiene. These requirements necessitate essential changes in technical approaches and swimming pool building construction, renovation. The real practical measurements obtained from water and energy consumption as a case study from swimming pool facility in Poland is elaborated, calculated, illustrated and compared. The results are illustrated and discussed to focus the water, energy and environment savings potentials of indoor swimming pools
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