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

By Edward G. Pita P.E.

Utilizing at the least arithmetic, this article explores the elemental strategies of air con and their software to platforms, explaining all recommendations in a transparent, functional demeanour. makes a speciality of difficulties and examples commonly encountered at the activity.

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List the fonr major components of any air conditioning system. Sketch a diagram that shows their arrangement. 5. What are the major components of a hydronic heating system and a hydronic cooling system" 6. Sketch a typical all-air air conditioning system and name each component. 7. What are the indoor environmental conditions that affect human comfort? IS 8. Using a sketch, describe the building design team's organization and responsibilities. 9. Using a sketch, describe the building construction team's organization and responsibilities.

B) Compound gage reads gage and vacuum pressure. 3, is Pabs ::::; Patm - Pvac 60 psig, respectively. How much is the pressure increased by the compressor? 5. 6) Some gages are constructed to read both vacuum and gage pressure. 4(b). 7 PRESSURE OF A LIQUID COLUMN A liquid exerts a pressure because of its weight, and the weight depends on the height of the column of liquid. 8. 4 Ib/ft3 (Table 2. I). 4 fe x 300 ft = 18,720 ft2 x 144 in. 6 Pressure exerted by a liquid column. Pressure may be expressed as "head" (height of liquid).

11 (b) shows that heat will flow from the higher temperature body, room air, to the lower temperature body, the air in the refrigerator interior, due to the temperature difference. 12. Of course if there is no temperature difference, there is no heat flow. The most common unit used for heat in the United States is the BTU (British Thermal Unit). The BTU is defined as the quantity of heat required to raise the temperature of one pound of water one degree Fahrenheit (F) at 59 F. Temperature is a measure of the thermal acti\"ity in a body.

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