Solar Thermal Applications | Space Heating, Solar Drying, Desalination
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Solar Drying system
Predominantly used in the agricultural industry to dry foods for storage purposes
Direct drying systems expose the product to the direct sunlight
key processes
heat transfer from the heating source to the target product
mass transfer of moisture from the product to the air
Indirect drying systems
Uses absorbing surfaces, which heat the air, which is further passed over the target product
Solar Air heating system [Space Heating]
Passive Space Heating
Radiation is absorbed by the structure itself
Large South Facing Windows are equipped
Substantial temp. variations may occur
Active Space Heating
Separate collectors, Storage devices, Backup system and pumps are used
Adopted for any type of building at any location
Principles of Passive heating
Direct Gain
Thermal Storage Wall
Roof Storage
Convective Loop
Direct Gain
Has large south facing windows
Walls & Floors receives radiation and emits by radiation and convection
Windows covered by shutters and curtains at night
Thermal Storage walls
Large black walls held behind glasses
Heat is absorbed and stored by Trombe walls
Roof Storage
Plastic water bags are kept on roof
Plastic sealed and movable panels fitted over it
Convective Loop
Ordinary flat plate collector is used
Convective circulation is employed
Heat is stored in rock bed and passed through floor vents as hot air
Floor vent is throttled or blocked manually as per the requirement
Active Space Heating Systems
Space Heating and hot water system with anti freeze circuit
Solar Desalination system
Technique to produce water with a low salt concentration from sea-water or brine using solar energy
Have been used for many decades
High-energy requirement and, therefore, their prohibitive costs have prevented their widespread
Kingdom of Saudi Arabia and the Gulf States are currently almost completely dependent on desalination
3 ساعت پیش
در تاریخ 1403/07/17 منتشر شده
است.
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