Infiltration and iaq 29th lecture infiltration o infiltration and ventilation o infiltration due to stack effect, temperature difference and wind velocity o air change and crack length methods for estimating infiltration. Broadly the air conditioning system can be classified in two broad categories. Before knowing about air conditioning, you should have to know about the concept of psychometry. It works winter and summer season so it called year round air conditioner. This is because the chilled water system can be networked to have multiple cooling coils distributed through out a large or distributed buildings with the refrigeration equipment chiller placed at one base central location. The design con ditions are important because they form the basis for heating, ventilating and air conditioning hvac system design and energy estimation for buildings. Download pdf, ppt, lecture slides, handouts, solutions, projects and much more by. This is an introduction to air conditioning systems frequently referred to as hvac systems heating, ventilating and air conditioning systems. The design con ditions are important because they form the basis for heating, ventilating and airconditioning hvac system design and energy estimation for buildings. What are the different types of air conditioning systems. Summer air conditioning systems winter air conditioning systems all year air conditioning systems module. Solar airconditioning solardriven airconditioning systems characteristics air conditioning load in tune with the solar radiation solar systems can be integrated in existing airconditioning units fan coils, floor heating systems small scale solar ac systems.
Getting introduced to the air conditioning industry is a major issue, since air conditioning industry interacts in almost every application in our life. Some requirements that prevail in office building air conditioning apply to hospital, but there are a number of additional concerns as well. Welcome to the nptel course on refrigeration and air conditioning. Mechanical engineering indian institute of technology kharagpur. Central air conditioning system this is the most important type of air conditioning system, which is. Year round air conditioning system in several countries both winter and summer is uncomfortable under such adverse weather condition air conditioner must provide comfort conditioning throughout the year such system is known as year round air conditioning 12. Ocean engineering n p t e l national programme on technology. Arora from iit kharagpur made available by nptel elearning initiative. Nptel provides elearning through online web and video courses various streams.
Humidification chamber insulated wall air out at t, ys as air in at tg, y water spray makeup water at tas water at tas pump figure 6. Nptel video lecture topic list created by linuxpert systems. It is the simplest form of an air conditioning system and is mounted on windows or walls. In our science of summer series, livescience looks at how air conditioners work to keep you cool, including the history and chemistry of your homes ac. Central air conditioning system this is the most important type of air conditioning system, which is adopted, when the cooling capacity required is 25 tr or more. So in the summer season they can be used as heating device and because. Learn for free, pay a small fee for exam and get a certificate. If orings andor seals for r1 2 air conditioning sys tems are used by mistake in the connections of an r 4a air conditioning system, the oring and seals will foam and swell resulting in leakage of refrigerant.
Refrigeration and air conditioning lecture notes pdf. So now that you are well versed on each of the four main types of air conditioning units, you are ready to call a cooling professional to talk about your options. Chapter 7 heating, ventilation, and air conditioning. Summer air conditioning systems capable of maintaining exactly the required conditions in the conditioned space are expensive to own and operate. Air, water or refrigerant are used as media for transferring energy from the air conditioning plant to the conditioned space. Lecture series on applied thermodynamics for marine systems by prof. Mcquiston heating ventilating air conditioning pdf torrent. Nptel video lectures, iit video lectures online, nptel youtube lectures, free video lectures, nptel online courses, youtube iit videos nptel courses. They may include data on climatic variables like air temperature, humidity, wind conditions and solar radiation. The unitary air conditioning system may be adopted for winter, summer or yearround air conditioning. Equally critical is the heating and cooling contractor selected, as the operating efficiency of a system depends as much on proper installation as it does on the performance rating. Special university course for future engineers lecture notes. Another important part of air conditioning installation is for commercial, industrial, residential and medical building or hospitals.
Study material for free on the refrigeration and air conditioning course. Objectives after studying this unit, you should be able to know what is refrigeration and air conditioning. Working of winter air conditioning system the outside air flows through a damper and mixes up with the recirculated air which is obtained by the conditioned space. Air conditioner year round system is the combination of heating and cooling. Air conditioning system design summarizes essential theory and then explains how the latest air conditioning technology operates. There are several choices for the type of air conditioning systems, each satisfying the hvac objectives with different degrees of success. It is a single unit that is assembled in a casing where all the components are located. Refrigeration and airconditioning nptel online videos. Heating, ventilation, and air conditioning one of the most important decisions regarding a new home is the type of heating and cooling system to install.
Which is basically a large heat exchanger, by rejecting heat to a cooling. Refrigeration and airconditioning is the subject which deals with the techniques to control the environments of the living and nonliving subjects and thus provide them comforts to enable them to perform better and have longer lives. It is mechanically linked to the wheels to provide the steering control. Outdoor design conditions for hvac system design and energy. Summer air conditioning system pdf nptel sante blog.
Click on any video lecture link to view and download that video. Objectives after studying this unit, you should be able to know what is refrigeration and airconditioning. Winter air conditioning system authorstream air conditioning system nptel air conditioning system winter in air conditioning system winter in. Lecture 03 air refrigeration cycle lecture 04 aircraft refrigeration. Window air conditioner units are reliable and simpletoinstall solution to keep a room cool while avoiding the costly construction of a central air system. Welcome back in the last lecture i discussed summer air conditioning system and the psychrometry of summer air conditioning systems. Applied thermodynamics for marine systems online course video. The current areas include bond graph and computer aided design techniques, computer aided manufacturing, flexible manufacturing systems and robotics, intelligent machines and systems, solid modelling and computer graphics, application of neural networks, systems dynamic simulation, precision engineering heating ventilation and air conditioning. If you have a big area to cool, central air conditioning may be the only way to go. Cooling and heating system is used for separate season summer and winter.
For an additional 9 years he was a principal staff. Window air conditioner is sometimes referred to as room air conditioner as well. Analysis of a summer air conditioning system with reheat for high latent cooling load applications section 30. Evaporative, winter and all year air conditioning systems nptel. The comfort chart see figure 88 is an empirically determined effective temperature index that has been published by the ashrae since 1950 the purpose of the comfort chart is to indicate the percentage of people feeling comfortable at various effective temperatures in the winter and summer.
May 05, 2014 flow diagram of winter air conditioning system 11. That means if you are designing a summer air conditioning system you take the maximum possible temperature dry bulb temperature in maximum. Nptel video lecture topic list created by linuxpert. Jun 10, 2011 if you have a big area to cool, central air conditioning may be the only way to go. Hello i welcome you all in this course on refrigeration and air conditioning, refrigeration part. Describe various air cycle refrigeration systems section 9. Ac system employs the refrigeration cycle to achieve cooling or heating and ods is about the type of refrigerants used in the refrigeration cycle.
In front wheels can be turned to left and right by steering system so that the vehicle can be steered. As we know that there are three types of comfort air conditioning. Window airconditioner units are reliable and simpletoinstall solution to keep a room cool while avoiding the costly construction of a central air system. Nptel, online courses and certification, learn for free. Load calculations, energy efficiency, and selection of technology are all explained in the context of air conditioning as a system, helping the reader fully consider the implications of design decisions.
The latent load can be reduced by desiccant material. All air systems, all water systems, air water systems, direct. Spring autumn winter wind direction summer cooling in summer heating in winter only for heat unit dehumidifying in rainy or humid season in hot summer, air. Both power generation and refrigeration are usually accomplished by a system that. Window type room air conditioners can regulate the room temperature and dry the room. It is intended for those engineers, architects and construction professionals who are only peripherally involved with hvac systems in their professional activities, but would like to learn more about. Sep 23, 2018 winter air conditioning system authorstream air conditioning system nptel air conditioning system winter in air conditioning system winter in.
Jul 20, 2016 windows ac vs split ac difference in hindi. Schematic of a summer air conditioning system with the thermal distribution system. Nptel chemical mass transfer operation 1 module 6 humidification and air conditioning lecture no. To maintain the efficiency of the air conditioning system the compressor drive belt should be checked regularly. The air conditioning compressor is driven by a drive belt that is pooured by the engine and can be engaged and disengaged by an electromagnetic coil on the front of the compressor fig.
Mechanical refrigeration and airconditioning youtube. Now let us look at development of air conditioning systems. Air conditioning system winter air conditioning system. Let me give a brief introduction design and analysis of air conditioning system involves a following steps selection of. Sensible heat formula for hvac engineers where does q1. Apr 19, 2016 windows air conditioning system window air conditioners are one of the most commonly used and cheapest type of air conditioners.
Centralized vs decentralized air conditioning systems. A thermal distribution system is required to circulate the media between the conditioned space and the ac plant. Introduction an air conditioning system consist of an air conditioning plant and thermal distribution system. By incorporating desiccant dehumidification with traditional vcr system, it reduces the energy cost which is required in traditional vcr system to cool the air up to its dew point temperature dpt, for dehumidifying it. Windows airconditioning system window air conditioners are one of the most commonly used and cheapest type of air conditioners. Paul guyer is a registered mechanical engineer, civil engineer, fire protection engineer and architect with over 35 years experience in the design of buildings and related infrastructure. The mixed air passes through a filter to remove dirt, dust and other impurities. The primary function of the steering system is to provide angular motion to front wheels so. Schematic representation of adiabatic saturation of air. Another important part of airconditioning installation is for commercial, industrial, residential and medical building or hospitals. The chilled water system is also called central air conditioning system.