Mechanical Engineers

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Cooling capacity of refrigerators and air conditioners

Have you ever wondered ? Why capacity of domestic refrigerator and Air Conditioner (AC) is different though both are refrigeration system? What is the basic difference between them with respect to the cooling capacity? The capacity of domestic refrigerator is normally rated in 'Litre'. Litre actually a unit of volume and it is also applicable to the domestic refrigerator while dealing with space to be cooled. Thus, litre capacity actually indicates the volume or space to be cooled by domestic refrigerator. On the other hand, capacity of Air Conditioner (AC) is given by term 'Ton'. Now, this term, What is one Ton refrigeration? 'Ton' is actually a name given to amount of heat to be extracted from 1 short ton (907.18474 kg) of water at 0 degree C to convert it to ice at the same temperature in 24 hours. (Note: 1 large ton = 1016.0469 kg, 1 metric ton = Tonne = 1000 kg) In other words, refrigeration rate required to freeze 1 ton of wa

Powertrain

BASICS OF POWERTRAIN The powertrain of a vehicle provides the means of generating power (the engine) and the means of transmitting that power to the wheels (the driveline). The most basic powertrain consists of an engine plus various driveline components as required for the particular powertrain configuration. These include components for torque multiplication (Transmission/Transaxle/Differential), power transmission (Shafts, chains, belts), and power distribution (Rear End/Differential). Engine Configurations The engine configuration of the car has a big impact on weight distribution. It also dictates the driveline requirements, which in turn affect weight distribution as well. Weight distribution tends to be front-biased in production-based vehicles, so achieving a balance requires moving components to the rear of the car. In scratch-built cars, the engine tends to be moved further rearward, cancelling the front weight bias. The front engine configuration, as show

IC Engine

You all are aware from this word IC Engine, but still don't know what exactly it is. "An internal combustion engine (ICE) is a heat engine where the combustion of a fuel occurs with an oxidizer (usually air) in a combustion chamber that is an integral part of the working fluid flow circuit." The internal combustion engine is an engine in which the burning of a fuel occurs in a confined space called a combustion chamber. This exothermic reaction of a fuel with an oxidizer creates gases of high temperature and pressure, which are permitted to expand. The defining feature of an internal combustion engine is that useful work is performed by the expanding hot gases acting directly to cause movement, for example by acting on pistons, rotors, or even by pressing on and moving the entire engine itself. This contrasts with external combustion engines, such as steam engines, which use the combustion process to heat a separate working fluid, typically water or

Turbines

You all know about turbines, here is a brief view of turbines. What actually turbine is : A turbine is a turbo machine with at least one moving part called a rotor assembly, which is a shaft or drum with blades attached. Moving fluid acts on the blades so that they move and impart rotational energy to the rotor. A windmill is the simplest kind of turbine: a machine designed to capture some of the energy from a moving fluid (a liquid or a gas) so it can be put to use. As the wind blows past a windmill's sails, they rotate, removing some of the wind's kinetic energy (energy of movement) and converting it into mechanical energy that turns heavy, rotating stones inside the mill. The faster the wind blows, the more energy it contains; the faster the sails spin, the more energy is supplied to the mill. Adding more sails to the windmill or changing their design so they catch the wind better can also help to capture more of the wind's energy. Although you may not

Solar Panel

SOLAR PANEL Although solar is becoming more popular everyday people still don’t know how solar panels work. Certain competing energy concerns have campaigns to discredit and confused consumers on how solar energy is generated. There are many considerations in regards to solar and distinctions between residential and industrial, between being off the grid and connecting the grid. This simple guide will outline how Solar Panels Work. Here’s a quick “how solar panels work” guide to the steps that it takes to turn sunlight into electricity using solar panels: Every day, light hits your roof’s solar panels with photons (particles of sunlight). The panel converts those photons into electrons of direct current (“DC”) electricity. Naturally, the sunnier it is, the more energy is produced by the panels. Those produced electrons flow out of the panel and into an inverter and other electrical safety devices. The inverter converts that “DC” power into alternating curr

Working of air conditioner

Air conditioners and refrigerators work the same way. Instead of cooling just the small, insulated space inside of a refrigerator, an air conditioner cools a room, a whole house, or an entire business. Air conditioners use chemicals that easily convert from a gas to a liquid and back again. This chemical is used to transfer heat from the air inside of a home to the outside air. The machine has three main parts. They are a compressor, a condenser and an evaporator. The compressor and condenser are usually located on the outside air portion of the air conditioner. The evaporator is located on the inside the house, sometimes as part of a furnace. That's the part that heats your house. The working fluid arrives at the compressor as a cool, low-pressure gas. The compressor squeezes the fluid. This packs the molecule of the fluid closer together. The closer the molecules are together, the higher its energy and its temperature. The working fluid leaves the compresso