The 2014 ASHRAE Handbook€”Refrigeration covers the refrigeration apparatus and structures for functions except human convenience. This quantity contains info and assistance on cooling, freezing, and storing nutrition; commercial and scientific purposes of refrigeration; and low-temperature refrigeration; and encompasses a dual-unit CD.
CD process necessities: 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 web Explorer eight or better; Adobe Acrobat/Reader 10.0 or greater; 350 MB hard-disk house. 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 monitor 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 better. quotation: 2014 ASHRAE Handbook
ASHRAE, based in 1894, is a global association of a few 50,000 individuals. ASHRAE fulfills its project of advancing heating, air flow, air con, and refrigeration to serve humanity and advertise a sustainable international via study, criteria writing, publishing, and carrying on with schooling.
The ASHRAE Handbooks are the layout normal for regulate of outfitted environments with volumes on structures and gear, 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 submit a sequence of texts for school room use.
many of the parts we submit in include:
-Energy Modeling and Auditing
-High functionality construction Design
-Indoor Air caliber and Environmental Quality
-Data heart 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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Extra info for 2014 ASHRAE Handbook -- Refrigeration (SI) (Ashrae Handbook Refrigeration Si (Systems-International)
23 Pumpdown compressor control is desirable on all systems using downfeed or upfeed evaporators, to protect the compressor against a liquid slugback in cases where liquid can accumulate in the suction header and/or the coil on system off cycles. Pumpdown compressor control is described in the section on Keeping Liquid from Crankcase During Off Cycles. Thermostatic expansion valve operation and application are described in Chapter 11. Thermostatic expansion valves should be sized carefully to avoid undersizing at full load and oversizing at partial load.
When the compressor starts up with a violent foaming action, oil is thrown out at an accelerated rate, and the separator immediately returns a large portion of this oil to the crankcase. Normally, the system should be designed with pumpdown control or crankcase heaters to minimize liquid absorption in the crankcase. • In systems using flooded evaporators, where refrigerant bleedoff is necessary to remove oil from the evaporator. Oil separators reduce the amount of bleedoff from the flooded cooler needed for operation.
This type of control scheme can be used instead of holding back excess refrigerant to flood portions of the condenser. KEEPING LIQUID FROM CRANKCASE DURING OFF CYCLES Control of reciprocating compressors should prevent excessive accumulation of liquid refrigerant in the crankcase during off cycles. Any one of the following control methods accomplishes this. Automatic Pumpdown Control (Direct-Expansion Air-Cooling Systems) The most effective way to keep liquid out of the crankcase during system shutdown is to operate the compressor on automatic pumpdown control.
2014 ASHRAE Handbook -- Refrigeration (SI) (Ashrae Handbook Refrigeration Si (Systems-International) by ASHRAE