The 2014 ASHRAE Handbook€”Refrigeration covers the refrigeration gear and structures for functions except human convenience. This quantity comprises information and tips on cooling, freezing, and storing meals; commercial and scientific purposes of refrigeration; and low-temperature refrigeration; and contains a dual-unit CD.
CD method standards: home windows: CD-ROM force; 1.3 GHz or quicker processor; Microsoft home windows Vista, home windows 7, or home windows eight (62-bit and 64-big); 1 GB of RAM (2 GB recommended); Microsoft net Explorer eight or better; Adobe Acrobat/Reader 10.0 or greater; 350 MB hard-disk area. Macintosh: Mac OS X v. 10.5.8 or v. 10.6.4; 512 MB of RAM (1 GB recommended); 415 MB hard-disk house; 800 x six hundred reveal answer (1024 x 768 recommended); Safari four for Mac OS X v. 10.5.8, Safari four or 5.0x for Mac OS X v. 10.6.4, Safari 6.0 for Mac OS X v. 10.7.4 or v. 10.8; Firefox; Adobe Acrobat/Reader 10.0 or larger. quotation: 2014 ASHRAE Handbook
ASHRAE, based in 1894, is a global association of a few 50,000 people. ASHRAE fulfills its project of advancing heating, air flow, air con, and refrigeration to serve humanity and advertise a sustainable global via study, criteria writing, publishing, and carrying on with schooling.
The ASHRAE Handbooks are the layout average for keep an eye on of equipped environments with volumes on structures and kit, HVAC functions, Refrigeration and basics. every one is up-to-date each 4 years. as well as publishing layout information for engineers, architects, and facility managers, we additionally put up a chain of texts for lecture room use.
many of the components we post in include:
-Energy Modeling and Auditing
-High functionality construction Design
-Indoor Air caliber and Environmental Quality
-Data middle strength Efficiency
-Noise & Vibration Control
-HVAC for Healthcare amenities
Read Online or Download 2014 ASHRAE Handbook -- Refrigeration (SI) (Ashrae Handbook Refrigeration Si (Systems-International) PDF
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Additional info for 2014 ASHRAE Handbook -- Refrigeration (SI) (Ashrae Handbook Refrigeration Si (Systems-International)
Figure 22 shows a basic arrangement for parallel condensers with a through-type receiver. Condensate drop legs must be long enough to allow liquid levels in them to adjust to equalize pressure losses between condensers at all operating conditions. Drop legs should be 150 to 300 mm higher than calculated to ensure that liquid outlets drain freely. This height provides a liquid pressure to offset the largest condenser pressure loss. The liquid seal prevents gas blow-by between condensers. Large single condensers with multiple coil circuits should be piped as though the independent circuits were parallel condensers.
The exact amount can be calculated from pressure loss through each path at all possible operating conditions. When condensers are water-cooled, a single automatic water valve for the condensers in one refrigeration system should be used. Individual valves for each condenser in a single system cannot maintain the same pressure and corresponding pressure drops. With evaporative condensers (Figure 24), pressure loss may be high. If parallel condensers are alike and all are operated, the differences may be small, and condenser outlets need not be more than 600 to 900 mm above the liquid line junction.
Figure 38 incorporates an air bypass arrangement for controlling pressure. A modulating motor, acting in response to a modulating pressure control, positions dampers so that the mixture of recirculated and cold inlet air maintains the desired pressure. In extremely cold weather, most of the air is recirculated. Air-Cooled Condensers Methods for condensing pressure control with air-cooled condensers include (1) cycling fan motor, (2) air throttling or bypassing, (3) coil flooding, and (4) fan motor speed control.