By Herbert W. Stanford III
HVAC Water Chillers and Cooling Towers offers basic rules and functional options for the layout, program, buy, operation, and upkeep of water chillers and cooling towers. Written by means of a number one professional within the box, the ebook analyzes themes similar to piping, water remedy, noise keep an eye on, electric provider, and effort potency for optimum procedure and kit functionality and provides wide checklists, troubleshooting thoughts, and reference information, in addition to steered standards for the procurement of recent or substitute apparatus. This reference additionally discusses right install and location of chillers and cooling towers, start-up, and skill.
Read or Download HVAC Water Chillers and Cooling Towers: Fundamentals, Application, and Operation (Mechanical Engineering (Marcell Dekker)) PDF
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Extra info for HVAC Water Chillers and Cooling Towers: Fundamentals, Application, and Operation (Mechanical Engineering (Marcell Dekker))
The most common vapor barrier consists of a kraft paper and aluminum foil laminate, reinforced with ﬁberglass threads (called foil scrim and kraft or FSK). Preformed glass ﬁber insulation with a factory-applied all service jacket will include the required vapor barrier. 2. Water Expansion and Air Removal Water expands and contracts when heated and cooled in almost direct proportion with the temperature change. Since water is incompressible, a lack of expansion space in a closed piping system means that any volume increase will cause a pressure increase that may result in mechanical damage to system components.
And less, is much less than that of steel. To prevent galvanic corrosion that is initiated by dissimilar metals in direct contact, connection between steel and copper piping materials must be electrically separated by a dielectric union. 3). Fittings for copper tubing are wrought copper and the tubing and ﬁttings are assembled by soldering the joints. Cast or Ductile Iron—For underground piping, cast iron piping or ductile iron piping is routinely used. Iron piping is rated for application in terms of “pressure class” and for most chilled water systems Class 350 is used up through 12 in.
If both machines were operated for the full load range (15 –100% of peak capacity), by the time the total system load drops to 30% of full load, each individual chiller would be operating very inefﬁciently. Thus, most designers utilize controls to shut off one chiller when the total system load, as evidenced by the return water temperature, falls below 50% of full load. However, with this piping arrangement, if one chiller is not in operation, chilled water from the operating chiller will mix (blend) with the return water passing through the nonoperating chiller, effectively raising the chilled water supply temperature to the system.