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

By Edward G. Pita P.E.

ISBN-10: 0130928720

ISBN-13: 9780130928726

Utilizing not less than arithmetic, this article explores the basic thoughts of air con and their program to platforms, explaining all techniques in a transparent, sensible demeanour. specializes in difficulties and examples ordinarily encountered at the task.

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Inside Representative. Processes sales and orders by phone and correspondence. Furnishes product information and prices. Estimator. Uses plans and specifications to determine quantity of materials, labor, and equipment for project. Prepares costs from this data. Contract Manager. Supervises contract. Responsible for costs, time schedule, and installation. Purchasing Agent. Orders and purchases materials and equipment. Checks technical characteristics, follows up delivery time. Field Supervisor.

19 _ _ _ _ _ _ _ _ _ _ _ __ At what temperature will water boil at a pressure of 10 psia? 3, we read the saturation temperature (boiling point) at 10 psia to be about 193 F. 20 Use the steam tables to determine if water is in a liquid or gas state at 300 F and 150 psia. 3, the saturation (boiling) temperature at 150 psi a is about 358 F. The actual temperature is less, therefore the water will be in a liquid state (subcooled liquid). 21 The operating engineer of a hot water heating system reads the temperature and pressure at the pump suction to be 200 F and 10 psia.

7 psia ammonia boils at -28 F, alcohol at 170 F, and copper at 4250J:<. Note that the higher the pressure on the wale I; the higher the boiling temperature, and the lower Ihe pressure, the lower the temperature at which it will boil. This same relation holds for other substances. Let us examine what causes this change in boil' ing point temperature. The Molecular (Kinetic) Theory of Liquids and Gases The process of boiling and the dependence of boiling point temperature on surrounding pressure can be explained by referring to the molecular (kinetic) theory of liquids and gases.

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

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