Direct Solar Geyser

solar geyserA direct solar water heater simply circulates the potable water in the solar HWC through the solar collector. The collected heat is then transferred directly to the household water supply. This eliminates the need for a heat exchanger and the use of heat transfer fluid.

Advantages

  • It’s relatively inexpensive, as no heat exchange is used.
  • The commission of the solar power system is easier.

Disadvantages

  • Anti-freezing systems and/or controls need to be installed when a solar water heater system is used in areas that are prone to freezing.
  • Water softeners need to be added when systems in areas with poor or hard water conditions are used.

Indirect Solar Geyser

solar geyserAn indirect solar water heater circulates a transfer fluid, other than water, through the solar collector: The collected heat is then transferred indirectly to the household water supply using a form of heat
exchanger.

Advantages

  • Very popular in climates that are prone to freezing.
  • Solar water heater system can be used in areas with hard or poor water conditions.

Disadvantages

  • It tends to be more expensive than a direct solar power system because of the required heat exchanger.
  • The commissioning of the solar power system is more complicated.
  • The heat transfer fluid needs to be replaced.