Download PDF by Edward G. Pita P.E.: Air Conditioning Principles and Systems: An Energy Approach

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By Edward G. Pita P.E.

ISBN-10: 0130928720

ISBN-13: 9780130928726

Utilizing at the least arithmetic, this ebook explores the elemental suggestions of air-con and their program to systems—explaining all techniques in a transparent, sensible demeanour, and concentrating on difficulties and examples ordinarily encountered at the activity. This ebook comprises the latest and industry-wide approved details on load calculations, layout facts, gear info, and use of the web. particular bankruptcy subject matters conceal the scope and makes use of of air-con; actual rules; heating rather a lot; furnaces and boilers; hydronic piping structures and terminal devices; cooling load calculations; psychrometrics; fluid circulation in piping and ducts; piping, valves, ducts, and insulation; lovers and air distribution units; centrifugal pumps, enlargement tanks, and venting; air con structures and kit; refrigeration platforms and kit; computerized controls; power usage and conservation; instrumentation, checking out, and balancing; and making plans and designing the HVAC approach; and sun heating and cooling structures. For consulting engineers, mechanical contractors, HVAC engineers, designers, undertaking managers, and amenities managers.

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Additional info for Air Conditioning Principles and Systems: An Energy Approach (4th Edition)

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For example, when two hydrogen atoms combine with one oxygen atom, the compound water is formed. 1(c). The chemical symbol for a compound denotes the atoms that make up that compound. Refrigerant 22 (R-22) is a substance commonly used in refrigeration systems. A refrigerant is a fluid that absorbs heat inside the conditioned area and releases heat outside the conditioned area. The chemical symbol for one molecule of R-22 is CHC1F2. One molecule of the refrigerant contains one atom of carbon, one atom of hydrogen, two atoms of fluorine, and one atom of chlorine.

RQ18 What precautions should you use when working in an area with a large number of people and you must disconnect the power from an appliance you are working on? RQ19 What is the difference between a fuse and a circuit breaker? RQ20 List at least five electrical safety rules that should CHAPTER 1 REVIEW be followed by refrigeration, heating, and airconditioning technicians. Copyright 2010 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Due to electronic rights, some third party content may be suppressed from the eBook and/or eChapter(s).

9 OHM’S LAW The relationship among the current, electromotive force, and resistance in an electric circuit is known as Ohm’s law. In the nineteenth century, George Ohm developed the mathematical comparisons of the major factors in an electric circuit. Stated in simple terms, Ohm’s law says it will take 1 volt of electrical pressure to push 1 ampere of electrical current flow through 1 ohm of electrical resistance; in other words, the greater the voltage the greater the current, and the greater the resistance the lesser the current.

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Air Conditioning Principles and Systems: An Energy Approach (4th Edition) by Edward G. Pita P.E.

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