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Air conditioning controller
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1. Types of air conditioning system The most commonly types of air conditioning system which are used are:- 1. Window air conditioner 2. Split air conditioner 3. Packaged air conditioner 4. Central air conditioning system 1.1. Window air conditioner Window air conditioner is the most widely used air conditioner for single rooms. It is a simplest form of air conditioning system. All the components like compressor, condenser, expansion valve, evaporator and cooling coil are enclosed in a single box. This arrangement is fitted in a space made in the wall of the room. Window air conditioner contains of the rigid base on which all the parts of the window air conditioner are accumulated. Parts of the Window Air Conditioners The parts of the window air conditioner can be divided into following categories • The refrigeration system • Air circulation system • Ventilation system • Control system • The electrical protection system The refrigeration system of window air conditioner The refrigeration system of window air conditioner is that which consists all parts of the refrigeration cycle namely condenser, compressor, evaporator and expansion valve. Refrigerant R22 is generally used in most of window air conditioners. Hermetically sealed type compressor is used in window air conditioners which are small in size and the life of this compressor is very long. Replacement is also very easy if there is any maintenance is required. Copper tubing is used for making the condenser of window air conditioners and it is cooled by the atmospheric air. Fin is used in the condenser to allow faster heat transfer rate from it. For the expansion valve in the window air conditioners capillary tube is used which is made up of the various round of the copper ... ... middle of paper ... ...offices, theater, various parts of the airport etc. The supply and the return air ducts are placed at the top of these rooms. The function of supply air ducts is to supply the cool air to the room through one set of the diffusers, while the function of return air ducts is to absorb the hot return air from the room for recirculation. After that the hot return air enters into the air handling unit, where it is cooled and reenters the room through supply duct to produce air conditioning effect. 1.4.4. Cooling Tower The cooling tower is used to cool the water. When water flows through compressor and condenser some water gets evaporated, to overcome this loss some water is also added in the cooling tower. Evaporative type of cooling tower is used. In the cooling tower the water is cooled by the atmospheric air and is re-circulated via the compressor and the condenser.
Whereby, instead of using a separate material as a regenerator to recuperate the heat from the magnetic material, the AMR concept made use of the refrigerant itself as the regenerator [6], thus, making it an active part of the refrigeration cycle. This is possible due to the high heat capacities of common magnetocaloric materials near their Curie temperatures [25].
In order to answer this double question, we have completed and focused our analysis mainly on the AirCap product manufactured by Sealed Air.
In warmer climates such as Egypt they used techniques as evaporative cooling, “if water is placed in shallow trays during the cool tropical nights, its rapid evaporation can cause ice to form in the trays, even if the air does not fall below freezing temperatures”. Although refrigeration developed in the 18th century it wasn’t until the mid-19th century when the first refrigerator built using vapor technology was build by American John Gorrie in 1844. A few years later commercial refrigeration was introduced as well as vapor compression technology which was the beginning of our modern refrigeration. Later that century ammonia was popularized as the evaporation chemical in refrigeration. All the trials and tribulations of refrigeration where all stepping stones to the 20th century and the introduction of modern refrigeration as we know it
Refrigeration is the process of cooling down a space or thing below normal environmental temperature. Food preservation is vital in today’s day and age. From the meats to the dairy, everything needs to be kept at room temperature, cold, or frozen. People even like to make themselves cold and frozen by using air conditioning. But, it does make you wonder “how” and “when”. How did refrigeration become such an important invention and how did people survive without it? When did our ancestors realize it takes the cold to keep their food preserved and looking fresh? We now have fridges that have an automated ice machine and touch screens.
The first application I’m going to discuss where water is used as a natural refrigerant is a swamp cooler, with a swamp cooler there is a drum that is made of an absorbing material where the bottom of the drum is submerged in water. A fan blows outside air across the drum as the air passes over the drum the temperature of the air decreases as the relative humidity is drawn from the drum into the outside air that is passing across the drum. Some pros to using a swamp cooler are the pretty cheap to build and surprisingly quite efficient to run and maintain.” They're cheap to build and install. The only materials it takes to make them are a blower fan, a pump, a pad (either synthetic or made of wood shavings), some water and a box (usually made of sheet metal), The National Association of Home Builders (NAHB) estimates that an evaporative cooler, installed, costs between $700 and $1,000, compared to several thousand dollars for a central air conditioner (Swamp)” Although there are some pros to a swamp cooler if you live in a humid climate where some of the humidity needs to be r...
Refrigeration Refrigeration is defined as “The process of removing heat from an enclosed space, or from a substance, to lower its pressure.” (First website given in bibliography) In simpler terms, it is removing heat from states of matter in order to keep them cooler. The basic need for refrigeration is to cool food and beverages, as they often get spoilt if the temperature is high. Before actual refrigerators and other such mechanical systems were introduced, it was very common for people to cool their food with ice and snow.
Mechanical based heat pumps systems all have some common components: a compresser, a condenser, and an evaporator. The whole system is made of pipes that circulate a fluid that allows the transfer of heat. The evaporator is what transfer heat from the air in the room to the fluid inside of the system of pipes. The condenser is what takes the heat from the fluid and transfers it to the air outside.
Humanity is threatened by the overwhelming growth of science and technology. People are expanding their knowledge through observation and experiment, oblivious to the consequences that result from improper motive. Isaac Asimov—author of The Life and Times of Multivac—uses the science of numbers, or mathematics, as a solution to the fear that arises in a world controlled by a human-like machine. What human beings are afraid of is losing the very word that separates them from everything else in the world—human, and they will do whatever they can to keep that title to themselves.
The factors for exponential growth for air-conditioning are the HVAC Market, energy, environment, communication, societal, political, preparing for the future, looking ahead, and the conclusion. Buildings of the U.S. use approximately 35% of the nation’s precise total of energy consumption. The worth of shipments by U.S. HVAC manufacturers was over $28 billion of 1996. Since there are 52,000 CHC chillers needed to be replaced among the U.S., there’s a large opportunity for new chillers, new technology for the HVAC industry. The ozone depletion is an international issue in which is currently being resolved. The 3rd world countries are still allowed to manufacture CFC’s. Illegal imports of CFC’S to the U.S. is a consistent concern. Many illegal imports are virgin CFC’s. Those whom have a political overtones are specifically the ones whom create a protectionism of local commerce, having a negative impact on those inside and out of the country.
furnaces. By letting all these gases release into the air, it makes it harder to breathe.
After the condensation process is finished and the steam reverts back to water, it is pumped into the reactor again, thus completing the process of producing nuclear-based power. Next, hydro-electricity is electricity produced by moving water, flowing past a turbine connected to a generator (“Hydropower”). According to Nationalgeographic.com, a typical hydro-plant is a system with three parts: an electric plant where electricity is produced, a dam that can be opened or closed to control water flow, and a reservoir where water can be stored.... ... middle of paper ... ...
Finally, the liquid moves to the evaporator, where heat from the inside air is absorbed and changes it from a liquid to a gas. After that, it goes again to the compressor, where the entire cycle is repeated.
Air is composed of molecules. Air is matter. It has mass and takes up space. Air is composed of different gases such as nitrogen, oxygen, carbon dioxide, water vapor, and other gases. Air molecules are in constant motion. As they move, they come in contact with surfaces. Air molecules push and press on the surfaces they contact. The amount of force per unit area that air molecules exert on a surface is called air pressure. (What is Air Pressure 6) Air pressure is caused by all of the air molecules in the Earth's atmosphere pressing down on the Earth's surfaces. We can measure air pressure to help us predict weather conditions around the world. Temperature also affects air pressure because air contracts when it cools and expands when it is heated. So if air above a region of Earth cools, it does not extend to as high an altitude as the surrounding air. In this case, its pressure at higher temperature is lower than in the surroundings even when the pressure at the surface is the same as in surrounding areas. Then air flows into the cooler region at high altitude, making the total weight of air above the region greater than in the surroundings. This is a "high". The cool air descends to the earth's surface. Near the surface, the falling air spreads out,
Process da: This low temperature liquid then enters the evaporator where it absorbs heat from the space to be cooled namely the refrigerator and becomes vapour
Window is an essential element in building. It can be define as an opening in a wall that allow the flow of air and light into the building. This will help to ventilate the building naturally, thus maximizing the thermal comfort even without the present of mechanical ventilation. Windows can be classified based on the nature of operational movements of shutters, materials used, manner of fixing and also its location.