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PRACTICAL CONSIDERATIONS, APPROX. PRICES & CHARACTERISTICS
Based on medium size building of around 30m. x 30m. x 30m. UK costs & prices (yr.2000)
1 Fluid flow
For a 10 deg. C rise between headers Flow rate is :- 7.17 cc. /sec. /m2 of FG area
Pipe size for FG unit 2m high x 1m 4 - 6 mm dia.
Header pipe size (for 100 - 200 m2 FG) 22 - 28 mm dia.
2 FG - IG units with one low E coating
(medium quantity including warranty) £130/m2
3 Solar Fluid drive Module SFDM (£1500) 7.5 - 15
Pump Filter Unit PFU (£900) 4.5 - 9
5 Fluid Distribution Control (£600) 3 - 6
6 Water storage at £100 / m3
(for building 30m x 30m x30m) 10/m2 of facade
7 Heat exchangers
HXr the room to storage ht.ex. with pump & fans 25/m2 facade
HXf the fluid to storage 2
HXa the storage to ambient inc. fans 9
apprx. total £191- 206/m2
8 Energy storage in water 50 - 100 L//m2 facade
for building 30m x 30m x 30m 0.65 to 1.3 % of building volume
for building 100m x 50m x 50m 0.4 to 0.8 %
9 Solar fluid for 6 mm. fluid cell thickness 5.3 L/m2 facade
10 approx. characteristics of FG _ FG unit with Low "E" hard coating
% variable to %
TL 65 < 15
TE 38 < 4
RL 8 5
RE 7 5
Fluid concentration 0 ppm to 50 ppm
11 "U" values (still air conditions)
fluid to ambient 11w/m2 deg.K with vacuum insulation 11w/m2 deg.K
fluid to room 1.6 to 1.3 around 0.1w/m2 deg.K
ambient to room 1.5 to 1.2 around 0.1w/m2 deg.K
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