The Central Power Research Institute is an autonomous society under the Ministry of Power, Govt. of India. In their Fan Testing Laboratory, ELECTRIC CEILING FANs are tested as per IS: 374 -1979 specification. This is published by the BUREAU OF INDIAN STANDARDS which is The National Standards Body of India. Air Delivery Test at CPRI Here is [...]
Fans cool us by creating a wind chill effect. The sweat on our skin evaporates more easily, we lose more body heat through convection and we feel cooler. Bigger, faster fans deliver more air and cool us better. Bigger, faster fans use more electricity and actually end up heating an insulated room. We need bigger, faster fans [...]
The difference between ordinary fans and superfans is the motor. Motors work on the principle that like magnetic poles repel. The fan blades are attached to a shaft that is connected to the motor. The motor has two main kinds of magnets. A permanent magnet and an electromagnet. The polarity of the electromagnet is changed [...]
Thermodynamics teaches us that energy is neither created nor destroyed, but it can be converted from one form to another. It also teaches us that whenever there is an energy conversion some energy is lost to the environment as heat. This increases the disorder or entropy in our universe. Life forms are highly ordered, low [...]
