Solar water heating scheme for a country house
Posted: Thu Feb 06, 2025 10:08 am
Solar collector connection diagrams
Heating and hot water supply systems with a solar collector must have a storage tank - a heat accumulator. This is due to the fact that the process of heat supply from the solar collector does not coincide in time and quantity with the consumption of thermal energy by consumers in the house. Solar energy is first accumulated in the heat accumulator, and then consumed as needed.
To accumulate energy received from a solar collector, it is advantageous to use a storage boiler of the DHW system or a buffer tank of the heating system. To do this, install a boiler and a buffer tank with an additional heat exchanger, to which the solar collector is connected.
Coolant in a heating system with a solar collector
In a solar heating system that only operates in the summer, water is used as a heat carrier. Water-based systems are suitable for seasonal summer homes or summer pools.
For heating and hot water supply systems of a residential building that operate all year round, it is necessary to use non-freezing liquids as a heat carrier - antifreeze based on propylene glycol or mineral oil.
All liquids - heat carriers expand when heated. Therefore, the heating circuit of the solar collector is necessarily equipped with an expansion tank.
In a circuit with a solar collector, there is also a risk of liquid boiling - protection against overheating and installation of a safety valve are necessary.
Protection against overheating of the solar collector circuit is usually achieved by selecting a storage tank of a sufficiently large volume to absorb excess heat.
To remove air from the collector circuit, an automatic air vent is installed.
To prevent the storage tank from emptying, the cold water pipeline is equipped with a check valve.
The expansion tank, air vent, and safety valve of the collector circuit are similar to those devices that are installed on the heating boiler in the house.
DHW system with natural circulation of coolant in the solar kenya mobile database circuit and with an electric heater in the storage tank.
For natural and sufficiently intensive circulation to occur in the circuit, the bottom of the storage tank must be at least 0.5 m higher than the solar collector (the higher, the better). In addition, they try to reduce the hydraulic resistance in the solar collector circuit. To do this, they increase the diameter of the pipes and shorten their length.
Antifreeze liquid is used as a coolant.
To heat water on cloudy days, the storage tank has an electric heater.
In order to reduce heat loss, the storage tank and pipelines are protected with 50 mm thick thermal insulation.
If the tank is installed in a cold attic, the thickness of the tank insulation should be increased to 100-150 mm, and the water pipes should be placed under the tank insulation.
For a summer cottage with seasonal living, only in summer, the solar collector circuit can be made without a heat exchanger in the tank. Water will flow into the collector circuit from the bottom of the tank, heat up and accumulate in the upper part of the tank. With the onset of cold weather, the system must be emptied of water.
Heating and hot water supply systems with a solar collector must have a storage tank - a heat accumulator. This is due to the fact that the process of heat supply from the solar collector does not coincide in time and quantity with the consumption of thermal energy by consumers in the house. Solar energy is first accumulated in the heat accumulator, and then consumed as needed.
To accumulate energy received from a solar collector, it is advantageous to use a storage boiler of the DHW system or a buffer tank of the heating system. To do this, install a boiler and a buffer tank with an additional heat exchanger, to which the solar collector is connected.
Coolant in a heating system with a solar collector
In a solar heating system that only operates in the summer, water is used as a heat carrier. Water-based systems are suitable for seasonal summer homes or summer pools.
For heating and hot water supply systems of a residential building that operate all year round, it is necessary to use non-freezing liquids as a heat carrier - antifreeze based on propylene glycol or mineral oil.
All liquids - heat carriers expand when heated. Therefore, the heating circuit of the solar collector is necessarily equipped with an expansion tank.
In a circuit with a solar collector, there is also a risk of liquid boiling - protection against overheating and installation of a safety valve are necessary.
Protection against overheating of the solar collector circuit is usually achieved by selecting a storage tank of a sufficiently large volume to absorb excess heat.
To remove air from the collector circuit, an automatic air vent is installed.
To prevent the storage tank from emptying, the cold water pipeline is equipped with a check valve.
The expansion tank, air vent, and safety valve of the collector circuit are similar to those devices that are installed on the heating boiler in the house.
DHW system with natural circulation of coolant in the solar kenya mobile database circuit and with an electric heater in the storage tank.
For natural and sufficiently intensive circulation to occur in the circuit, the bottom of the storage tank must be at least 0.5 m higher than the solar collector (the higher, the better). In addition, they try to reduce the hydraulic resistance in the solar collector circuit. To do this, they increase the diameter of the pipes and shorten their length.
Antifreeze liquid is used as a coolant.
To heat water on cloudy days, the storage tank has an electric heater.
In order to reduce heat loss, the storage tank and pipelines are protected with 50 mm thick thermal insulation.
If the tank is installed in a cold attic, the thickness of the tank insulation should be increased to 100-150 mm, and the water pipes should be placed under the tank insulation.
For a summer cottage with seasonal living, only in summer, the solar collector circuit can be made without a heat exchanger in the tank. Water will flow into the collector circuit from the bottom of the tank, heat up and accumulate in the upper part of the tank. With the onset of cold weather, the system must be emptied of water.