solar hot water for aquaculture
For salmon and trout hatcheries the delivered water is usually ground water and is typically heated from 8-9°C to 14-15°C. Unglazed flat plate collectors operate efficiently at these low temperatures and have a low capital cost, therefore they are preferred over other liquid-based collectors for this application. These low temperatures are so advantageous for efficient operation of the solar collectors that the water can even be heated during the night when the air temperature is high. These systems pass the water once through and heat is recaptured from the effluent via a large parallel plate heat exchanger. Thermal storage is recommended so that heated water can be provided during the night and on cloudy days.
An auxiliary heating system is not necessarily required with trout hatcheries because trout can easily handle a fluctuating temperature between 8°C and 15°C. It is, however, necessary for salmon.
Related categories• AGRICULTURE
• SOLAR ENERGY AND POWER
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