Objective
Demonstrate different operating strategies of solar collectors combined with a heat pump system linked to indoor and outdoor pools. Possibility to use solar collectors outside the Summer period. Estimated savings 443,7 Mwh or 50 TOE/a.
The demonstration plant was monitored during the two summers 1983 and 1985
1983 1985
Direct solar use 35 Mwh 28 Mwh
Environmental energy to the heat pump 90 Mwh 48 Mwh
Sum 125 Mwh 76 Mwh
Energy by m2 collector area 411 Kwh/m2 250 Kwh/m2
Total energy used by the pool 1930 Mwh 1410 Mwh
Direct solar fraction 1,8% 2,0%
Total supply from solar and heat pump 310 Mwh 117 Mwh
The performance of the solar system together with the heat pump did not reach the target. The total energy system (heat pump and solar), had a very bad system COP: in 1983 = 1.68 in 1985 = 2.85.
Well functioning solar system without a heat pump have an overall COP (circulation pump's electricity to total solar energy) of typically above 20. Unless this system-COP is not improved at least by a factor 4 the cost/effectiveness will be bad.
The swimming facility comprises 2 indoor and 3 outdoor pools. Total watersurface outdoor, 1154m2. The solar system consists of 302.4m2 of unglazed polypropylene absorber (Robinsons) combined with a heat pump. The plant can be run in 3 different ways :
1. Direct use of solar heat via a heat exchanger for outdoor pool heating.
2. Use of the solar panels as heat absorbers for a heat pump, when the solar panels heat production is too low for direct pool heating.
3. When the outdoor pool is out of use in winter, the poolwater is used as a heat storing reservoir.
The heat pump, for heating the shower water of the indoor pools, draws energy from solar absorbers, if possible or draws energy from the pool water thus cooling down the pool. The solar overcost is Dkr. 1,070,000 including the heatpump but net of VAT = 130,000 ECU.
Programme(s)
Topic(s)
Call for proposal
Data not availableFunding Scheme
DEM - Demonstration contractsCoordinator
8700 Horsens
Denmark