Objective
Cost effective use of unglazed solar collectors for heating a swimming pool in Northern Europe. Open air swimming pool 2 731 m2 surface, circular form without pool cover used during the Summer months. Estimated energy savings: 75 TOE/y.
Quite encouraging in spite of difficulties with monitoring equipment. The following daily results have been found in 1983
total solar energy : 292 Kwh/m2
solar fraction of total heat demand : 44%
mean temperature : 22 deg. C.
For a complete 3-4 month season, the system capacity is estimated as 400 Mw.
Installed cost of the system was ca. 3DKr/kwh. m.
Total Solar District Solar Mean pool Solar Spec.
solar
Year solar electr. auxil. fraction temp. effic. gain
per
m2
MWh MWh MWh % deg. C % KWh/m2
1984 308.2 17.6 179.961% 21 deg. C 43,5% 191
1985 380.1 16,1 377,4 43,4% 21,3 deg. C 53,6% 236
1986 336,0 14,3 489,0 40% 21,9 deg. C 48,7% 208
The solar fraction of the total energy consumption was 52% in 1984, and 38% in 1985.
The problems encountered were not with the solar plant, but whith the monitoring system.
A 2 731 m2 circular outdoor pool is equipped with 1 612 m2 of unglazed polypropylene absorbers (Fafco) installed on the roofs of two sports halls at a slope of 22 degrees facing east and west. No pool cover is foreseen due to the special geometry of the pool. The monitoring with an automatic data acquisition system is part of a central data system which was installed by the town authorities for all the public buildings. With this equipment overall energy management will help the authorities to optimize energy supply from not only the collectors but the local multi-fuel power station. The solar overcost is: 2,693,000 Dkr. or 327,000 ECU.
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Coordinator
2620 ALBERTSLUND
Denmark
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