Heat of earth

Not only take but also give is the newest trend at heat of earth usage. We document this in the view of a company building from 1984.

Company building
	Built 1984 with 24 m² heat collectors on the roof. 2005 had been 153 m² photovoltaic with 21.65 kW peak added. The estimeated yearly yield was 20500 kWh, 2007 was the yield 22400 kWh.

Heat collectors
	Full with water collector system. For warming up the earth collector is also a low temperature enough. Sometimes also without sun, when the air is warm enough.

Switchboard for the heat management
	Original from 1984, this switchboard controlls the heatpump, the 2 earth collectors and the heat collector on the roof.

Earth-collector
	Take not only heat, give also heat. The earth collector as a low temperature saisonal storage. Heat from the 24 m² solar collector on the roof heat up the earth collector.

Heat pump Siemens SA 30 P
	In front of the company building outside is this 29 kW heat pump. At a heat pump, each degree Celsius teperature difference is important.

Floor heating
	Floor heating is not equal to floot heating. A very uniform distribution of the heat makes a very low input temperature possible. Less electric power demand at the heat pump.

Climate controll by the floor
	The conference room has a large window to the south side. When the sun shines into the room, the floor is direct heated up. A floor heating can take away the heat.