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Manufacturers of Wind Driven Ventilators/Turbo Ventilators/Turbine Ventilators/Roof Ventilators |
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Don / Yeti WIND DRIVEN TURBO VENTILATORS (WDTV)
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Advantages of Roof Top Wind Driven Turbo Ventilators:
- Healthy living: Free spinning Don and Yeti roof ventilator provides fresh air all year round 24 hours a day, 365 days a year.
- No cost of operation: The Don and Yeti turbo ventilator is self-contained wind powered system so there is no electricity or wiring expenses. A slight breeze is sufficient to spin the rotary turbine albeit, even with absence of any breeze, the turbine still ventilates taking advantage of stack height and stack pressure due to temperature difference.
- Increased productivity: By promoting healthier and more comfortable working environment through proper ventilation, the efficiency of people and machine is improved.
- Enhanced living: Industrial fumes, kitchen smokes, insect repellent etc can be removed.
- Reduced maintenance cost: Trapped moisture and heat in roof space can work on structure, sheets, paintings, electric cables etc. Wind turbine helps in prolonging the lifespan of the assets by removing hot and damp air.It helps achieve the pollution control board regulation and abide by the law
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WORKING
- Don and Yeti wind ventilators are basically exhaust ventilators used to remove odor, fumes, dust, heat and moisture from an enclosed occupied space wherein in normal circumstances, an electric motor powered roof or wall exhaust fan or mechanical exhaust system would be used.
- Don and Yeti roof ventilators employ three principles of natural, mechanical and exhaust ventilation to form an integrated system thereby enhancing the performance in air handling capacity.
- Don and Yeti turbo ventilator has a working similar to that of a centrifugal pump impeller, only difference is that mechanical energy required to rotate the impeller be imparted by the wind instead of an electric motor.
A well designed Don and Yeti wind powered ventilator takes advantage of the wind to create a positive flow through the throat of the ventilator. The wind influences performance of the ventilator in two ways
- As the wind approaches and strikes the ventilator, it jumps, creating an area of low pressure on the leeward side of the turbine. This low pressure zone is fed by drawing air from the turbine, causing a continuous extraction of air from the area over which the ventilator is installed.
- As the turbine rotates, the centripetal forces associated with the rotation fling air outwards from the tips of the vanes. Replacement air is drawn into the throat of the ventilator, from the area to be ventilated, causing continuous ventilation.
- Hot air from the room, because of its low density, rises up and gets accumulated in roof space. The thermal current caused by the buoyancy of air helps the turbine to rotate even in the absence of wind.
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CONSTRUCTION:
- All Aluminium Alloy Sheet metal non-corroding body.
- All surface protected with external application UV stabilized powder coating.
- Stainless steel shaft.
- All hardware is stainless steel including those for fixing on the roof shed.
- Bearings permanently lubricated, sealed, suitably seated in sealed bearing housing for dust protection and heat protected by heat deflector.
- Rigid curved vanes aerodynamically profiled with ribs for strength, suitably balanced and stress relieved for Don vertical vane ventilator.
- Four arms structurally designed braces for stability and high wind load capacity.
- Entire head is so assembled that there is no water ingress inside the turbine and rainwater falling on the head gets either deflected or drained outside the throat.
- The base is made of thick gauge aluminum alloy sheet firmly secured to the throat as well as the roofing sheet by SS hardware. Standard base suitable for regular corrugated ACC sheet is fixed with high quality long life rubber packing for any air leakage etc. However, for other roofing sheets with irregular profiles, special profile-matched UV stabilized FRP base is constructed and suitably fixed on the roof.
- The throat is mountable with variable angle of roof from 0 to 45 degree so that the turbine shaft is always vertical and the head is horizontal to the ground.
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Installation:
- The EcoSpace’s Don and Yeti wind driven turbine ventilator can be mounted on any type of roof. However, it may be a difficult task to make a hole in the RCC slab and hence in such case it is advisable to plan it at construction stage.
- The vari-pitch throat enables the ventilator to be mounted on a roof slope from 0 through 45 degrees.
- A hole of 600mm or 900mm is cut on the roof sheet on which ventilator is to be mounted.
- The location of the ventilator base is either near the ridge and such that one side of the base sheet is under one sheet and other side on top of the sheet. Any spacing between the base and the roof sheet is sealed with suitably profiled rubber pads.
- The locations of the ventilator
- At the top under the ridge.
- At the location where two roofing sheets are overlapping.
Precaution:
- Not to be mounted directly on top of a high heat producing source or open furnace.
- Not to be mounted where wind is obstructed by other structures or surroundings.
- If mounted on monitor roof, the side openings should be covered.
Inlet air:
- It shall be assured by the user that the stack height (height difference between exhaust point and inlet air such as window, shutter etc) is maximum possible.
- All openings in the roof and ventilation near the roof shall be suitably closed to avoid short circuit of ventilating air. Or Ventilators should be placed at least 6 meters away from the inlet point.
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