Refrigeration and air conditioning 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. An introduction to hvac systems for medical facilities. In a liquid system, there are two separate chambersone to perform the dehumidification or conditioning and the other to reactivate or regenerate the desiccant. In this type of system, electrical precipitators remove the dust particles from the air. Evaporative, winter and all year air conditioning systems.
Analysis of a summer air conditioning system with reheat for high latent. Oct 05, 20 air conditioning other zones 1 patient rooms. Ravi kumar department of mechanical and industrial engineering indian initiation of technology, rookee hello i welcome you all in this course on refrigeration and air condoning and today we will. Air condition requirement in hospitals linkedin slideshare. Healthcare cooling hospital ventilation health care air. The absorption cycle is similar in certain respects to the electrically driven vapour compression machines. Sidebar new edition adds focus to efficient operations in the spring of 2010, the american society of heating, refrigerating and airconditioning engineers ashrae technical committee 9. Intelligent design air conditioning and heating 477,099 views 5. While a ddc system can function independently or standalone at the buildinglevel, it. He is also a senior professional engineer with farnsworth group, a consulting engineering firm located in st louis, missouri. An optimal air conditioning system filters air, maintains a certain number of air exchanges per hour, and maintains temperature and humidity of the area. Introduction to commercial building hvac systems and energy. Learn for free, pay a small fee for exam and get a certificate.
The compressor only cuts in if the switchon conditions are fulfilled. The air is first passed between plates where the dust particles are charged with electricity. Jun 21, 2011 importance of a hospital hvac system 1. Which is basically a large heat exchanger, by rejecting heat to a cooling. Refrigeration and airconditioning is the subject which deals with the.
Nptel nptel online certification course refrigeration and air conditioning lecture35 air conditioning systems with prof. Sep 29, 2018 intelligent design air conditioning and heating 477,099 views 5. Evaporative coolers can reduce air temperature by 15 to 40f but are best suited for dry climates, such as those in the southwestern u. Heating, ventilation and air conditioning hvac systems. It is more important in dry areas where dust storm common in the summer months. In 1841, the american physician john gorrie, devised an air. Can a vapor absorption refrigeration system be used by an air. Nptel video lectures, iit video lectures online, nptel youtube lectures, free video lectures, nptel online courses, youtube iit videos nptel courses. Importance of fresh air and ventilation indoor air quality the most common concept for an indoor air quality is used is an equivalent to the cleanliness of indoor air. Review and cite heating ventilation and airconditioning protocol, troubleshooting. Figure 4 is a schematic of a liquiddesiccantdehumidification system. The responsibility for generating these favourable conditions for the pathologies treated in the different areas of a hospital lies with heating, ventilating and air conditioning hvac system. Wp5 education and economic promotion ventilation system.
Mechanical engineering refrigeration and air conditioning nptel. Know later, that refrigeration is an integral component of airconditioning. Airconditioning involves the delivery of air which can be warmed or cooled and have its humidity raised or lowered. Chapter 7 heating, ventilation, and air conditioning 127 figure 73 air conditioning with the vapor compression cycle the exterior, aircooled condensing unit should be kept free from plants and debris that might block the flow of air through the coil or damage the thin fins of the coil. Heating, ventilation and conditioning hvac for hospitals. Guidelines for hospital operating and delivery room air. Introduction to hvac systems for medical facilities. Describe various air cycle refrigeration systems section 9. Introduction to commercial building hvac systems and. Importance of a hospital hvac systemhospital air conditioning and hospital ventilation systems are required to meet higher standardsof performance and serve a greater function than those in standard buildings. Refrigeration and air conditioningiit kharagpur notes scribd.
Guidance for filtration and aircleaning systems to. Jan 01, 2016 this video guides you with a 3d model of a typical hvac system of an office building to help you understand how a building is cooled down and what is does with the heat. The cooler air is channeled into the home and the warm air out of it. 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. Download link is provided and students can download the anna university ee6008 microcontroller based system design mcbsd syllabus question bank lecture notes syllabus part a 2 marks with answers part b 16 marks question bank with answer, all the materials are listed below for the students to make use of it and score good maximum marks with our study materials. Hospital ventilation and air conditioning requires a thorough knowledge of the ventilation and air conditioning system. Theyre also less costly to install and use about a quarter of the energy of central air conditioners. A direct digital control ddc system consists of microprocessor based hardware used to control a buildings mechanical and electrical systems, particularly the heating, ventilating and air conditioning hvac system. Learn for free, pay a small fee for exam and get a certificate featured news. Full text full text is available as a scanned copy of the original print version. Lecture 03 air refrigeration cycle lecture 04 aircraft refrigeration. Hospital facilities as, perfect air conditioning system is helpful in the prevention and treatment of disease, the construction of air conditioning system for health facilities presents many precautions not encountered in the usual comfort air conditioning systems. Mechanical refrigeration and airconditioning youtube. At a lower temperature, molecular motion slows down and the growth of bacteria that causes food spoilage also retards.
Selection criteria for air conditioning systems section 36. Thus, besides providing acceptable indoor climate for the patients and the personnel, air conditioning removes odour and anaesthetic gases, and reduces the risk of infection to the patient by. Chapter 7 heating, ventilation, and air conditioning. Introduction to air conditioning systems course no. A refrigeration cycle is operated with the condenser, expan. The function light signals that the air conditioning system is in standby mode.
Blood plasma and antibiotics are manufactured by freezedrying process. Hospital ventilation should provide patients with adequate conditions for recovery, and doctors with adequate air quality for concentrated work 24 hours a day, 365 days a year. Filtration and aircleaning systems to protect building environments from airborne chemical, biological, or radiological attacks department of health and human services centers for disease control and prevention national institute for occupational safety and health april 2003. Know later, that refrigeration is an integral component of air conditioning. The hvac cooling design for facilities housing critical care and other inpatient services shall be based on the 0. This general specification for airconditioning, refrigeration, ventilation and central monitoring and control system installation is ed and all rights including subsequent amendments are reserved. If the whole building is to be air conditioned, hvac engineers find that putting individual units in each of the rooms is very expensive making this a. In a hospital setting, for instance, we have a positive pressure cleanroom for mixing sterile. Objectives after studying this unit, you should be able to know what is refrigeration and air conditioning. Can a vapor absorption refrigeration system be used by an air conditioning system. Hospitals and healthcare estates are under increasing pressure to deliver more with less, whilst also complying with stringent regulations, health and safety measures and ever changing technologies.
How a chiller, cooling tower and air handling unit work. Mr cox is a licensed professional engineer in several states and has been involved with the design of many hospital heating, ventilation and airconditioning systems in the. Energy efficient hospitals air conditioning systems. The responsibility for generating these favourable conditions for the pathologies treated in the different areas of a hospital lies with heating, ventilating and airconditioning hvac system. Both power generation and refrigeration are usually accomplished by a system that. Heating, ventilation, air conditioning hvac 105 most homes in kentucky have a choice of the following approaches for central, forcedair systems. There is a variety of different air pollutants with different potential effects on comfort and health that should be taken into account while designing building services systems. Solar absorption air conditioning system of the various air conditioning alternatives shown in figure 1, the absorption system appears to be one of the most promising methods. The control may be manual or automatic, in which case, a room thermostat. 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.
Refrigeration and air conditioning is the subject which deals with the. Heating, ventilation and conditioning hvac for hospitals 1. Air conditioning systems 36th lecture a all air systems b all water systems c air water systems d unitary systems window air conditioners module 16. This video guides you with a 3d model of a typical hvac system of an office building to help you understand how a building is cooled down and what is does with the heat.
A hospital hvacsystem is probably the most vital application of hvac technology in terms of human health,comfort and safety. In fact, infection control experts have provided guidelines on hospital hvac system filtration, temperature, humidity, air change, pressurization and exhaust, all in the name of providing superior patient care. An outlet supplying luminaires shall be calculated based upon. This general specification is solely compiled for use on airconditioning. The first unit for the ac for the teaching hospital of the university of jordan used. The study of solar absorption airconditioning systems.
There are several choices for the type of air conditioning systems, each satisfying the hvac objectives with different degrees of success. Healthcare cooling hospital ventilation health care. Comfort air conditioning is defined as the process of. Florida hospital for treating yellowfever patients by blowing air over buckets of ice. Refrigeration and air conditioningiit kharagpur notes free ebook download as pdf file. Nptel, online courses and certification, learn for free. There is also a free pdf available, called hospital isolation room hvac system design, that was an ashrae yea illinois chapter presentation made at the specialty environment design conference in march 2014. Mr cox is a licensed professional engineer in several states and has been involved with the design of many hospital heating, ventilation and air conditioning systems in the. Chapter 7 heating, ventilation, and air conditioning 127 figure 73 air conditioning with the vapor compression cycle the exterior, air cooled condensing unit should be kept free from plants and debris that might block the flow of air through the coil or damage the thin fins of the coil. This makes it much different from a typical building hvac system, where comfort is the main objective. Get a printable copy pdf file of the complete article 150k, or click on a page image below to browse page by page. Cfm ot corrected total outdoor air quantity, cfm st total system airflow i.
May 15, 2018 the cooler air is channeled into the home and the warm air out of it. Importance of a hospital hvac system linkedin slideshare. The chilled water system is also called central air conditioning system. 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.
To maintain the efficiency of the air conditioning system the compressor drive belt should be checked regularly. These systems are thus suitable for office buildings, hospitals, schools, hotels. Ramgopal department of mechanical engineering iit kharagpur. Central air conditioning is used for cooling big buildings, houses, offices, entire hotels, gyms, movie theaters, factories etc. John gorrie, gave up his medical practice to engage in time. Ppt heating, ventilation and conditioning hvac for. Scandinavian journal of work envir onment and health 34 4.
Refrigeration and air conditioning notes free download as word doc. 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. In some large air conditioning systems, air is cleaned by electricity. Air conditioning the air conditioning system is switched on by pressing the air conditioning button. Hospitals considering the special needs of environmental comfort in hospitals, air conditioning systems must meet specific technical and functional requirements, including hospitalization area, where the air conditioning system must ensure adequate thermal comfort and prevent diseases transmission. Air conditioning two general types of air conditioning cooling refrigerantbased. If the whole building is to be air conditioned, hvac engineers find that putting individual units in each of the rooms is very expensive making this a better option. Hospital, clinic room ventilation and air conditioning. Effective design of heating, ventilation and airconditioning. Higher air change rates may be required to meet air conditioning or makeup air requirements as supported by engineering calculations.
Special university course for future engineers lecture notes. Guidance for filtration and aircleaning systems to protect. A technician with proper hvac certification will learn how to install, maintain, and upgrade this type of equipment as part of specialized training in hospital. Refrigeration and airconditioning nptel online videos. Air conditioning is required in all normally occupied facilities and spaces in which the interior conditions listed in ufc 451001 cannot be met through natural ventilation alone. Nptel provides elearning through online web and video courses various streams. An airconditioner is an apparatus for controlling, especially lowering, the temperature and humidity of an enclosed space. Among hospital staff in relation to indoor air and the condition and need for repairs in hospital buildings. Jan 20, 2015 adjustable multiplex air jet outlet systems that target air flow exactly to desired locations in a room these are just a few examples of the special equipment installed in hospitals. Pdf ee6008 microcontroller based system design mcbsd. Then the air is passed through a second set of oppositely charged plates that. The hvac cooling design for facilities housing critical care and other inpatient services shall be.
To design and construct ventilation system that is capable of efficiently fulfilling all requirements, often even contradictory, is a great challenge 114. Centralized vs decentralized air conditioning systems. Chart and diagram slides for powerpoint beautifully designed chart and diagram s for powerpoint with visually stunning graphics and animation effects. Fan and duct systems 37th lecture frictional pressure drops in straight ducts of circular and rectangular cross. Increased demands for air conditioning have brought about rapid increase in. The total corrected outdoor air requirement for central systems supplying spaces with different ratios of outdoor air tosupply air is determined from the following. Broadly the air conditioning system can be classified in two broad categories.
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