Ecohouse 2 by Sue Roaf
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Posted By: JSHarrisI'm worried about those rooms over-heating, especially as they have a relatively large roof window area that faces south.
Posted By: JSHarrisI've extracted the global irradiance data for each month, converted it to kWh per day per m²
Posted By: JSHarrisJ per degree C = 150 x 1000 x 4.18 = 627,000 J/deg Cif incoming water temp is 10 deg C and DHW temp is 55 deg C, then delta T = 45 deg CEnergy required for a 45 deg C temperature increase = 6127,000 x 45 = 28,215,000 J = 7.8375 kWh (seems a bit high to me, maybe we should use less DHW)
Posted By: SteamyTeaAs for FP or ET, rather than get bogged down in detailed comparison of the technology, just think which one would look best. The fact that there does not seem to be a definitive answer, and both systems exist in the marketplace, says to me that there really is no overall difference. So it comes down to available space, money, reliability and looks.
Posted By: owlmanLate last year I completed my Solar power ( PV and ST ) with the installation of a 30tube/180l cylinder set up. The location is only just OK in winter, ( 2.5 months ) with a couple of hours midday shading from my neighbours house. Still the performance has been very impressive. The merest hint of sunshine and the manifold temperature shoots up, and on a bright day my 180l cylinder is pushing 25°C top to bottom. It doesn't sound much but this winter pre-heat for my PHx is great and all considering the mains is coming in some days at 7°C or less. The array oversize is deliberate in order to take advantage of this winter gain.
Posted By: Ed DaviesSome people prefer FP for aesthetic reasons but I think it's just a matter of getting used to whatever.
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