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Content archived on 2022-12-27

HEAT RECOVERY AND WATER TREATMENT IN A RECREATION CENTER COMPRISING SWIMMING POOLS AND DRY SPORTS FACILITIES

Objective

Construction of a large sport centre containing, among others, dry sports, sauna and a swimming pool that can give an annual energy saving of 12.5% of the annual energy consumption of an equivalent sport complex designed without any energy saving care. This saving should be the result of a good insulation of external walls of the building and also due to the type and efficiency of its technical equipment.
A series of measurements made during the monitoring period of the project made it possible to determine the annual energy consumption of the building. They can be summarised as follows:
- energy consumption for technical equipment: 0,48 MWh/m2/year
- total energy consumption : 1,22 MWh/m2/year.
Technical equipment include among others, pump, fans, boilers and heat pump; the main difference between consumption for technical equipment and total consumption is lighting.
A comparison has been made with a fictitious classical sport centre of the same type but without energy saving means.
The assumptions made in the determination of the fictitious building gave the following consumption :
- energy consumption for technical equipment: 0,78 MWh/m2/year
- total energy consumption: 1,18 MWh/m2/year.
The comparison is thus very conclusive if one only considers the energy consumption of the technical equipment.
The increase of the total consumption is mainly due to the real occupation of thesport centre which is two times greater than expected. This gave a larger consumption for lighting and a larger total consumption : about 7.2 GWh instead of 3.0 MWh expected|
On a technical point of view, one can say that the reinforced thermal insulation of the external envelope of the building and the use of appropriate and efficient technical equipment is conclusive: a decrease of about 38% of the consumption has been obtained.
The only lack in sizing the technical equipment is the over-estimation of the heat recovered from the heat pump which was really used for heating. The internal heat gains due to the occupation were nearly always sufficient to compensate the heat losses through the external envelope of the building. This decreased a little the interest of the heat pump.
The sport centre is build in DARLINGTON - county of DURHAM, north -east of England. The centre makes it possible to do all indoor, dry and wet sports; it is opened to the public all day long and in the evening.
a) THERMAL CHARACTERISTICS OF THE EXTERNAL ENVELOPE
The external envelope is constituted of opaque walls for 95% of the area and only 5% for glazing. The mean thermal transmission coefficients are about 0,4 w/m2/deg. C and 3,0 w/m2/deg. C respectively for opaque walls and glazing.
These architectural concept and external envelope constitution contribute to minimize heat losses of the building.
b) TECHNICAL EQUIPMENT
The main characteristics of the technical equipment are:
- use of ozone to purify the swimming pool water; this water treatment decreases the smell of chlorine in the air so that the ventilation with external air can be reduced.
- use of heat pump for deshumidifying and refrigerating with heat recovery for heating needs and sanitary hot water production.
- heatrecovery from the discharged air of ventilation to heat the fresh incoming air. This recovery is performed by a system of coils with a mixture of water and anti-freeze as thermal medium. - use of a energy efficient lighting system
- use of a computerised energy management system.
The expected annual energy consumption is 3 GWh.

Call for proposal

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Coordinator

Borough of Darlington
EU contribution
No data
Address
Town Hall
DL1 5QN Darlington
United Kingdom

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Total cost
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