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In a closed space like a room with still air, the cooler air stays at the bottom, and the warm air rises to the ceiling. This segmentation of air happens due to the difference in the densities, and this phenomenon is called stratification. This becomes a problem in winters as the much-needed warm air recedes to the ceiling leaving the space close to the floor cooler. When heating elements are used to warm the space, it requires more heat generation…
Thermal adaptation is the ability of the human body to adjust to temperatures. The human body works to maintain the core body temperature at 37° celsius. The loss or gain of heat from the environment activates the thermal regulators in the body to warm or cool respectively. The thermal regulation system in our body functions intending to keep ourselves at a comfortable temperature. The core of our body passes on heat to the skin to maintain comfort during cold climates,…
The primary objective of a ceiling fan is to offer thermal comfort to the occupant. The effectiveness of a ceiling fan is the measure of its thermal comfort and its other aspects like efficiency, durability, noise limit, wellness, local influence, value, environmental impact. Thermal comfort The condition of people’s minds that expresses satisfaction with the thermal environment is called thermal comfort. For many years, humans have been using fans to regulate thermal comfort. Ceiling fans regulate their occupants’ thermal comfort…
BLDC ceiling fans are marketed based only on their power consumption. But the power consumption depends on various other parameters, size, airflow, speed to name a few. Especially the ’28 W‘ is being used in the market a lot, is it true? Can a BLDC ceiling fan consume 28W or lesser? There could be two possibilities: 1. It could be a marketing gimmick of expressing the specification of the BLDC ceiling fan in a clever way to deceive. One step…
Is the ceiling fan you buy, fair to you and everybody else? Superfan makes ceiling fans that strive to be fair to the consumers, the nation, and the environment. CUSTOMERS Sensible Innovation Ceiling fans earlier were negligent about power consumption, contributing to expensive electricity bills and pollution due to electricity generation, Superfan broke this stereotype in 2012 by inventing India’s first super energy efficient ceiling fans. This innovation replaced the inefficient AC induction motor of ceiling fans with Brush-Less Direct…
The function of a regulator is to provide the user with control over the fan. This control comes with a loss of power. Therefore, it is good to choose the type of regulator that minimizes this loss (To know more read: What does a fan regulator do? ). Regulators also save energy as the user can operate the fan at the desired RPM, which may be lower than the highest RPM in many instances. Currently, capacitive-based regulators are the best…
Regulators, as the name suggests, regulate or control the speed of the fan motor. They have been around since the 1950s, and there are a few types of them. Resistive regulator These are the box type regulators, found in many old building and homes. It has a wire wound resistor with different contact points as the speed positions, with each contact point corresponding to a resistance value. The presence of resistance reduces the voltage supplied to the fan. In an AC induction motor,…
Government of India through the Ministry of Power operates an agency called Bureau of Energy Efficiency (BEE) that assigns energy efficiency rating to appliances that are participating. The efficiency is rated in a star-based system, with ‘5 stars’ indicating the most efficient and ‘1 star’ the least efficient. BEE formulates an efficiency parameter and its required value for each appliance. Many of us are familiar with the star rating in ACs & refrigerators. Recently, it was ruled that from Jan…
Speed fluctuation in regular ceiling fans Ever experienced that your regular ceiling fan runs at a higher speed in the early hours of the morning or change speed on its own? This speed fluctuation stems from the inherent behaviour of the type of motor used in the ceiling fan. A regular ceiling fan is driven by Alternating Current Induction Motor (ACIM), for which, loosely speaking, the input supply voltage determines the rotation speed. The domestic input supply voltage (ideally 230V)…
Motors are the primary component in a ceiling fan and this blog throws light on working of ceiling fan motors especially BLDC motors. Electric Motor And It’s Working We come across hundreds of motors in our daily life from domestic to industrial applications. Motors are electrical machines that convert electrical energy into mechanical energy (rotational motion). This rotational motion can be translated into linear motions as well based on the application. All electric motors have the following parts: Stator –…