Wood heating

The solar panel system consists of:
- Water heater / double jacketed heater (delivered separately)
- Water heating system (delivered separately)
- Plate heat exchanger (delivered separately)
- Solar panel with fittings
- Steering unit (with sensors)
- Pump
- Water tank / heat storage
- 4 faucets
- Pipe part for connecting of the solar panel circuit
- 3 coilers

1. All water filled in a heater and heating storage comes from community water. The heating storage is not pressurised, and have a max-limit, which means if there is to much water in the tank, it will pour into a overflow at the top of the tank. The overflow can be connected to a drain. The cold community water (consumption water)is pre-heated in the coiler of the heating storage, before being led to the heater, where the water is post-heated after necessity. This water is used for tap water/ shower water.

2. At the bottom of the heat storage and in the lower part of the solar panel, there are sensors (S2 and S1), which determine when the steering unit must supply electricity for the solar panel pump (P1). The pump starts when S2 and S1 feels that the temperature in the heat storage is lower than in the solar panel.

3. The water in the solar panel is pumped through its own pipe system from bottom to the top of the panel. The solar panel has a green house effect and heats the water as it moves along. The hot water exits at the top of the panel and pours back into the heating storage.

4. The water inside the heating storage will continue ti circulate until the pump (P1) stops, which is either when:
- S1 and S2 has the same temperature
- The heat storage has too high temperatures
- The solar panel has too low temperatures

5. The warmest water will lie on top of the heat storage, while the cold water will sink to the bottom. The hot water in the heat storage pre-warms the water circulating through the coils in the heat storage. This helps bring down the consumption of electricity in the water heater.

6. The system is connected to a plate heat exchanger, which helps the heat storage add heat from any kind of heat source. ASV Solar delivers a standard plate heat exchanger which can add up to 50 kW per hour to the container. It is possible to deliver larger container systems if necessary.

7. In addition to heating the tap water, this system also has its own coil connected to the water heating system, which means you don´t need to invest in a double jacketed heater. The water heating system collects heat from coils in the solar panel's heat storage when needed. The temperature is regulated by a self-adjusting outdoors temperature-shunt valve. If the temperature drops, the water heating system will collect more heat from the heat storage through the coils.

System drawing


Term overview

Heat storage: A water-tank which holds hot water from the solar panel
Steering unit: A differentiating thermostat which starts the solar panel pump
Plate heat exchanger: A unit which transfers heat energy between two fluids with different temperatures without mixing them.
Coil: Two or three elements in the heat storage which switches heat for different heating needs.
Community water: Water used for shower and tap water.
Solar panel circuit: The pipe system leading from the heat storage, through the entire solar panel and back into the heat storage again.
Shunt Valve: A unit mixing water into the right temperature in connection with the water heating construction.
Setback Valve: A connection to the pipe system in the heat storage which controls the movement of the water.
Circulation pump: A unit pumping water from the container, through the solar panel circuit.

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