Building Technology: Mechanical and Electrical Systems, 2nd by Benjamin Stein

By Benjamin Stein

The entire advisor to construction technology

This complete consultant presents whole insurance of each element of the construction technologist's occupation. It information layout and install approaches, describes all suitable apparatus and undefined, and illustrates the practise of operating drawings and development information that meet undertaking necessities, code standards, and criteria. the writer establishes strategies for pro box inspections and kit operations checks, presents real-world examples from either residential and nonresidential building initiatives, and makes particular references to code compliance through the text.

This new version comprises alterations in construction codes, advances in fabrics and layout ideas, and the emergence of computer-aided layout (CAD), whereas maintaining the logical constitution and worthwhile unique gains of the 1st version. greater than 1,100 drawings, tables, and pictures supplement and illustrate discussions within the textual content. subject matters lined include:
* Heating, ventilating, and air-con structures- gear and design
* Plumbing platforms- gear and design
* electric and lights structures- apparatus and design
* checking out, adjusting, and balancing approaches for all development systems
* each point of the construction technologist's career, from the production of operating drawings via on-site supervision and structures maintenance

vast appendices contain conversion components; duct layout facts; try file kinds to be used in box paintings; layout types and schedules for electric, HVAC, and plumbing paintings; and extra.

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Extra info for Building Technology: Mechanical and Electrical Systems, 2nd Edition

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11 tion will be negative if the body loses heat to the surrounding air and positive if it gains heat convectively. c. Radiation Radiation is the transfer of heat through space from a mass at a higher temperature to a mass at a lower temperature. The classic example of radiation occurs between the sun and the earth, through a vast expanse of vacuum. The air is not necessary; the atmosphere actually interferes somewhat with radiant heat transfer by absorbing and dispersing some of it. Radiation of heat occurs between all bodies that exist in line-of-sight to each other.

C. Wet Bulb (WB) Temperature Wet bulb temperature measures the cooling that results from evaporation. 2, when water evaporates, it absorbs heat from the surrounding air and from the surface on which the water rests. This is the reason that we feel chilled when stepping out of a shower, even in a very warm but relatively dry bathroom. The exposed skin from which water is evaporating is actually giving up large amounts of sensible heat, which is being absorbed by the evaporating water as latent heat, thus rapidly cooling the body.

Consequently, we see that the cooling effect of water evaporation can be used as a measure of the relative humidity of the surrounding air. The higher the air humidity, the slower water evaporates and the lower its cooling effect on the surface from which it evaporates. 3. The device is simply a piece of wood or other rigid material onto which are affixed two ordinary thermometers. One thermometer simply reads the air temperature, that is, the dry bulb temperature. 3 Sling psychrometer, so called because the de- vice is whirled around like a sling, until the temperature on the thermometer with the wet sock stabilizes.

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