Parabolic Heater

The defining characteristic of a parabolic heater is the deflection plate that is able to spread the heat out in many directions. This is an advantage over standard space heaters that blow heat in one direction.One reason parabolic heaters are gaining in popularity is their efficiency. Parabolic heaters can run at an 80 percent efficiency rating, meaning that they utilize 80 percent of the energy they take in to turn back into heat, wasting less energy than other heaters.

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Features

  • The working fluid can achieve higher temperature in a concentrator system when compared with another evacuated tube system of the same solar-energy collecting surface. This means that a higher thermodynamic efficiency can be achieved.
  • The thermal efficiency is greater because of the small heat –loss area relative to the receiver area.
  • Reflecting surface requires loss material and is structurally simple than other collector. For a concentrating collector, the cost per unit area of the solar collecting surface is therefore less than that of another collector.

Working Principle

In parabolic through collector, long, parabolic mirror focus the rays of the sun into an absorber pipe. The mirrors track the sun on one linear axis from north to south during the day. The pipe is seated above the mirror in the centre along the focal line and has a heat absorbent medium running in it. The Collector is generally composed of one bent glass mirror, with either silver (or) aluminum coated on the back side of the glass. The glass is about 4mm thick and low in iron, maximizing the reflect once of incoming sunlight. Parabolic through collectors are a low-cost implementation of concentrated solar power technology. That focuses incident sunlight on to a tube filled with a heat transfer fluid. The efficiency and cost of the parabolic through collector designs are influenced by structural stiffness, choice of materials, assembly tolerance, mirror cleanliness and wear.

Application

  1. Used for producing steam for cooking
  2. Various Industrial application
  3. Produce electricity using ORC
  4. Air cooler using adsorption chiller
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