Solar thermal Pre-heated hot water to feed boiler as make up water.(Cost saving)
Solar Thermal can provide Hot water of about 70 to 80 Degrees C with free sunlight. Water heating cost, example, How much kw to heat 100 liters of water? for example, 100 liters of water, to be heated from 10ºC to 42ºC, giving a temperature rise of 32ºC would give – 100 x 4 x 32 / 3412 = ...