Air conditioner working principle in summer air conditioning system. In most process cooling applications, a pumping system circulates cool water or a waterglycol solution from the chiller to the process. Basic classification of hvac systems for selection guide. A well designed hvac system also provides 112 environmental protection, operator protection as well as comfortable working conditions for 1 operators. The waterlithium bromide vapor absorption system is used in a number of air conditioning applications. It controls the movement, quality and temperature of air to ventilate, warm and cool the organism. Air conditioning has changed over the years, the hvac system is used to control the environment in the manufacturing as well as the storage area of the. An air handling unit ahu is used to condition and circulate air as part of a heating, ventilating, and airconditioning system.
As always, contact your local trane comfort specialist if you have additional questions. Hvac software for building hvac control or building management system bms an assembly of all above components forms an hvac system. Airconditioning hvac systems as they relate to energy code requirements. The examples and energysavings potential discussed in this guide are not intended as specifications for implementation, nor should they be. Heating, ventilation, and air conditioning hvac 2 latent heat 3 mechanical refrigeration 6 relative humidity rh 4 temperature 2 key terms after studying this chapter, the reader should be able to. The student will be introduced to thermodynamics and psychrometrics, plans and specs, space. For example, in the refrigeration cycle, the evaporator cooling coil is colder than the air flowing around it, so heat flows from the warmer air into the evaporator. This liquid changes to the gas and evaporates as it extracts heat from the air around it and under low pressure conditions it is converted into liquid again and after entering the normal pressure range it is. Schematic for a typical summer air conditioning system is arranged. Electrical heaters are often used as backup or supplemental heat for heat pump systems. Heat flow is a basic principle of refrigeration in fact, of all hvac work. This book is written mainly with the interests of students and instructors in these departments in mind. The basic principles of duct design, part 1 energy vanguard.
Control systems for heating, ventilating, and air conditioning, by roger haines. Hvac systems understandinghvac systems understanding the basisthe basis table of contentstable of contents 1. Safety here mainly concerns the indoor air quality or iaq, meaning that the indoor air. The outside air flows through the damper and mixed with recirculated air which is. Air handling unit or ahu is an assembly of air conditioning components such as fans, cooling coils, filters, humidifiers and dampers integrated into a selfcontained package and installed as a single unit, which is connected to system of metal duct work that distributes the conditioned air. Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that todays audiences expect. Vapor compression refrigeration system basic, working. This is the largest and the main component of the commercial hvac system. However, the material covered and the method of presentation are such that the text is also suitable for adult evening classes and for onthejob training and selfinstruction. The smoother that inner surface is, the better it is for air flow. Ahus connect to ductwork that distributes the conditioned air through the building, and returns it to the ahu. Guide to hvac design, theory of operation, and primary. Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from. An air conditioner ac in a room or a car works by collecting hot air from a given space, processing it within itself with the help of a refrigerant and a bunch of coils and then releasing cool air into the same space where the hot air had originally been collected.
Inside the furnace, there is a heat exchanger which helps to switch on when the furnace is activated. May 21, 2007 heat flow is a basic principle of refrigeration in fact, of all hvac work. In the condenser of the chiller, the heat is transferred to the condenser water, or directly to the outside air well talk more about this below. Does working on your house make it feel more like a home. Hvac economizers 101 principles and operations for efficiency greg jourdan, wenatchee valley college. As the air moves through a duct, it interacts with the surfaces. In recent years, dc inverter air conditioner is becoming more popular compared to the conventional air conditioner due to its many advantages. A all air system b all water system c airwater system d unitary refrigerant based system a all air systems as the name suggests, air is used as the media in an all air system.
The outside air flows through the damper and mixed with recirculated air which is obtained from the conditioned space. Get the basics about hvac systems so you can make an educated purchasing decision. Introduction to hvac systemsintroduction to hvac systems 2. Ppt chilled water basics powerpoint presentation free to. This system is useful for applications where the temperature required is more than 32 degree f. The simplest control in hvac system is cycling or onoff control to meet part load conditions. The premise of this method is that any hvac system can be dissected into basic subsystems. University of colorado boulder, co, usa overview system description secondary hvac systems air distribution room diffusers and air terminals duct design fan characteristics air handling units water distribution cooling coils pipes and pumps primary hvac systems electric chillers.
This hvac training video will identify the purpose and goals of the hvac system, describe basic hvac parts, and explain how the parts work. The objective of an hvac system is to ensure that an indoor environment is both safe and comfortable for humans. Anytime a liquids change to a gas vapor, it must give up its heat. Unfortunately, the design of vrf systems is more complicated and requires additional work compared to designing a conventional direct expansion dx system. A condenser water pump and chemical treatment for the condenser water loop adds to the maintenance required with a watercooled system. Energy is consumed by the parts of the system that heat and cool the air and movement. As the building load increases, the system runs longer and its off period is. A system that does any one or more of those tasks is called a hvac system.
If building only needs half the energy that the system is designed to deliver, the system runs for about ten minutes, turns off for ten minutes, and then cycles on again. The compressor is driven by the engine through a belt drive. Coordination of hvac and fire detection and alarm system 74. Prepare for the ase heating and air conditioning a7 certification test content area a ac system service, diagnosis and repair. With a higher efficiency and increased controllability, the vrf system can help achieve a sustainable design. A hvac system is a heating, ventilation, and airconditioning system. The purpose of this period is to provide a method for understanding the components of different types of hvac systems. The basic function of the ahu is take in outside air, condition it and supply fresh air to a building. Hvac ducting principles and fundamentals 2012 instructor. Winner of the standing ovation award for best powerpoint templates from presentations magazine. Jun 22, 2017 covering the basics, showing the typical system along with the main components and an animated drawing explaining its operation in both cooling and heating mode as well as how the refrigerant works. Hvac system operation is a major driver of building energy consumption. The ahu is a large metal box containing separate ventilators for supply and exhaust, heating coil, cooling coil, heatingcooling recovery system, air filter racks or chambers, sound attenuators, mixing chamber, and dampers. Contents introduction to conventional technical systems in buildings hvac, electrical systems and servicesweek 1 hvac system types, working principles and.
Rooms typically have several complete air changes per hour. An assembly of all above components forms an hvac system. Hvac systems cooling systems air distribution systems principles of refrigeration air conditioning and. The heating, ventilation and air conditioning hvac system of any building is like the respiratory system of a human being.
Often installed into a single system, these three functions of the hvac system are closely interrelated to provide thermal comfort and to. Hvac system is a basic requirement of a pharmaceutical manufacturing facility. Hvac economizers 101 principles and operations for efficiency. You cant, for instance, do much with your vehicles engine without knowing how it works, and the same principle applies when it comes to the hvac system cooling down your macon, georgia, home this summer. Hvac systems are complex and the extent of actual or potential energy savings will vary greatly from one hvac system to another. Combustion ends before the blower motor stops working, so all the warm air in your heat exchanger and your ductwork will get to the rooms of. Courses in heating, ventilation and air conditioning hvac are usually offered in departments of mechanical engineering, civil engineering, architecture and building science. Introduction to commercial building hvac systems and energy. Heating, ventilation, and airconditioning hvac systems ppt. May 28, 2018 hvac software for building hvac control or building management system bms an assembly of all above components forms an hvac system. This principle is also used for baseboard heaters and portable heaters. Vapor compression refrigeration system basic, working, parts of system, advantages, and disadvantages introduction. How a chilled water system works hvac training shop.
Part of being a handyman or handywoman means knowing how things tick. Jan 06, 2017 an air conditioner ac in a room or a car works by collecting hot air from a given space, processing it within itself with the help of a refrigerant and a bunch of coils and then releasing cool air into the same space where the hot air had originally been collected. As the compressor takes the most power in any air conditioning system, the change in the compressor technology has enabled better and more efficient air conditioner or heatpump to be deployed. Examples include adequate lighting, and proper furniture and work surfaces. The automotive air conditioning system includes thecompressor, condenser, evaporator, receiverdehydrator and connecting lineswhich includes expansion valve, orifice tube, suction throttling valve,positive operating absolute valve, evaporator pressure regulator valve, thermal sensor, high pressure cut off switch and cycling compressor switch. Ppt chilled water basics powerpoint presentation free. Principles of heating, ventilation and air conditioning with worked examples by by nihal e.
How air conditioning works the essential ingredients in an air conditioning system are a fan to blow air around, a cold surface to cool and dehumidify the air, a warm surface and a source of water vapour. A chilling water systems refrigeration cycle works by removing heat from chill water in the evaporator of the chiller. It has different parts those help to maintain the required temperature and humidity in the manufacturing area. Anytime a liquids change to a gas vapor, it must give up its heat and the heat is carried off in the. Hvac air distribution equipmentshvac air distribution equipments 5. In a large system there will also be a tangle of tubes to distribute the air and collect it again.
Ppt on hvac system selection for powerpoint slides. These systems feature ductwork, which carries air throughout. May 29, 2017 does working on your house make it feel more like a home. This cool fluid removes heat from the process and the warm fluid returns to the chiller. Experiment with a working economizer unit under normal operations and. Covering the basics, showing the typical system along with the main components and an animated drawing explaining its operation in both cooling and heating mode as well as how the refrigerant works.
Introduction definition air conditioning is the process of altering the properties of air primarily temperature and humidity to more favorable conditions. For plant cooling, continued operation under the most extreme. Working principle, types and comparison with vapor compression system, saving potential 4. Hvac is an acronym for heating, ventilation, and air conditioning. Ive written previously about the two factors involved in reducing air flow in ducts. Air conditioner hvac systems what is a hvac system. Aug 10, 2017 heating and air conditioning split system. This is both a building system designed to keep the environment comfortable for building occupants and the industry that supports these systems. Fundamentals of hvac ppt a7 m01 final ppt video online download. Our new crystalgraphics chart and diagram slides for powerpoint is a collection of over impressively designed datadriven chart and editable diagram s guaranteed to impress any audience. Learn about the most common hvac systems and equipment, along with energyrelated components and controls. Most air conditioning and heating systems require some form of duct work to channel or direct the. Sep 22, 2015 the working of automotive air condition system is similar to all other air conditioning system. Sep 21, 2015 your hvac system is the core of heating and cooling within your home.
Its important to understand how different heating and cooling distribution systems work. The examples and energysavings potential discussed in this guide are not intended as specifications for implementation, nor should they be considered to provide instruction on how to. Design guide for heating, ventilating, and air conditioning systems. However, watercooled chillers have higher efficiency and therefore lower operational costs. Chart and diagram slides for powerpoint beautifully designed chart and diagram s for powerpoint with visually stunning graphics and animation effects. Generally, it contains an air conditioner designed to cool refrigerant outside of your house, and a furnace with a fan or coil inside the house. A slightly positive pressure to reduce outside air infiltration. The refrigerant vapour from the evaporator is compressed to high pressure by the compressor. In the background of hvac system, an hvac water chiller produces chilled water which is then circulated throughout the building or space upto cooling coils in air handling units. How air handling units work ahu working principle hvac ventilation. In a single zone allair hvac system, one control device such as thermostat located in the zone controls the operation of the system, as shown in. Here are some special features of the water and lithium bromide in an absorption refrigeration. A good hvac system aims to provide thermal control and indoor comfort, and one that is designed using the principles of thermodynamics, fluid mechanics, and heat transfer.
Vaporcompression refrigeration, in which the refrigerant undergoes phase changes, is one of the many refrigeration cycles and is the most widely used method for airconditioning of buildings and automobiles. Hvac systems understandinghvac systems understanding the basisthe basis. In this system, the air is cooled and generally dehumidified. Airconditioning hvac systems as they relate to energy code.
Introduction to commercial building hvac systems and. If you get a highquality system, youre never going to feel uncomfortable at the height of summer or in the dead of winter. List uses for heat pumps, air conditioners, and humidifiers. In order to have a better understanding if these systems, you need to know some of the principles behind hvac design. The big air conditioner boxes that you might see on top of apartment blocks or offices are examples of the visible part of hvac systems. After 54 a revision, the second edition of the document was. Refrigerant has a low boiling point, making it ideal for hvac systems. This book has been written especially for use in programs where a full curriculum in refrigeration is offered. Principles of hvac principles of hvac course description. Sub topic introduction principles of airconditioning type of of airconditioning cooling cycle refrigeration cycle the coolant 3.
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