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Jawaharlal Nehru National Solar Mission Towards Building Solar India
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Nehru was one of the influencing statesman of 20th century. He played a great role in the freedom struggle of India. Nehru is mentor of Indian foreign policy and provide India a precise scheme of thought with regard to look their action in specific m
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Services (NEHRU SCIENCE CENTRE, MUMBAI): One of the most outstanding features of the Nehru science centre is the efficiency with which their services have been carried out. The toilet block is placed on the rear side in such a way that all the pipes are concealed within the shaft. The water tank has been suitably hidden between the tops of the ventilation shafts. The restrictions on the number of windows in the exhibition halls has affected crossventilation. Thus forced ventilation became necessary and it was preferred because the other alternative of air-conditioning the building was very expensive. •
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The ventilation system is mechanical: •
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The centrifugal fans blow the air in through the vent shafts and the tube-axial fans provided at the exhaust. Two blowers have been fitted at the terrace level. These blowers are actually backward curved centrifugal fans with double width and double inlet. These blowers suck the surrounding air through the R.C.C. Louvers and force it down the galvanised iron duct in to the ventilation shafts. The shaft is a hollow tube measuring 2.3mx2.15m. The forced air is thrown in to each display area through an inlet at the roof level. The polluted air is thrown out from the exhibition areas through an outlet at the floor level by means of tube axial fans mounted on top of each shaft. The ventilation system has the following disadvantages – 1. The amount of air changes facilitated by the system does not achieve comfort levels. 2. When forced air reaches the louver level the force exerted by the blowers on the air is considerably reduced. Thus one does not feel the fast air movement, which is necessary in a humid place like Mumbai. 3. The air inlets and outlets are placed just ten feet away from each other.
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Loud noise and vibrations are caused by the blower’s inspite of the use of glass fibre lining on the ducts.
Lighting: Skylights were provided for natural lighting. At some exhibits natural lighting was not needed much so artificial lightings were provided. There were shades of lightings in entire building because of exhibits requirements. Dimmed lightings were provided near toilets and service blocks. • •
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Services Areas: •
There are two service accesses, one each for the material and the food movements.
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The main service core consists of the stairs, elevators and toilets to serve all floors, for the visitors as well as staff.
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Additional lifts have been provided for the staff members, which link the basement to the exhibition areas.
In addition to the normal electrical and plumbing services, provision has been made for an emergency generator set and air cooling facility. •
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The large basement with its peripheral walls having heat absorbing capacity, could make it a source for supplying cool air to the rest of the building.
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The intelligence of the building operates and monitors the system of displaced ventilation.
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It is able to achieve a cooling inside inspite of the heat generated by various equipment’s, occupants and lighting load.
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This system of passive cooling has resulted in an enormous saving of energy that has earned it the green building award.
