Refrigeration and Air Conditioning Equipment Cooling Episode 3 pdf
Direct HFC and PFC Emissions from Use of Refrigeration and Air Conditioning Equipment pptx
... estimating emissions from the manufacturing of refrigera- tion and air conditioning equipment is found in the Climate Leaders guidance for Direct HFC and PFC Emissions From Manufacturing Refrigeration ... Of ce of Air and Radiation Refrigeration/ AC Equipment Use — Guidance SECTION 2 Methods for Calculating Emissions M ost large companies will h...
Ngày tải lên: 08/03/2014, 19:20
Refrigeration and Air Conditioning IV (Equypment Cooling) pdf
... instruction in refrigeration and air conditioning. The scope of this subcourse takes in unit components of the absorption system, including their functions and maintenance; water treatment methods and their ... Check the standpipe for water seal circulation before starting the pumps. (8) Start the chilled water pump and open the valves to insure circulation through the evaporato...
Ngày tải lên: 27/06/2014, 05:20
Refrigeration and Air Conditioning 3 E Part 1 doc
... Maintenance. Service. Fault-finding. Training 33 8 34 Efficiency and economy in operation 35 1 35 Catalogue selection 35 7 Appendix Units of measurement 36 7 References 36 9 Index 37 3 vi Contents The ... space–temperature curves would eventually meet and no further heat could be trans- ferred. The fluid in Example 1. 11 would cool the water down to 3 C. The effectiveness of...
Ngày tải lên: 12/08/2014, 00:20
Refrigeration and Air Conditioning 3 E Part 2 potx
... contributes CO 2 emission to the atmosphere. The choice of refrigerant is therefore about the efficiency of the refrigerant and the efficiency of the refrigeration system. The less the amount of energy ... copper. This chapter is about the new refrigerants and the new attitude needed in design, maintenance and servicing of refrigeration equipment. 3. 2 Ideal properties for a re...
Ngày tải lên: 12/08/2014, 00:20
Refrigeration and Air Conditioning 3 E Part 3 pptx
... covered by the provisions of BS.4 434 :1980 and require safety pressure relief devices as outlined in Section 6.10. In cases where there is no shut-off valve between the condenser and receiver, ... the condenser heat. If the mass flow is reduced, the temperature rise must increase, raising the condensing temperature and pressure to give lower plant efficiency. In practice, the temperatu...
Ngày tải lên: 12/08/2014, 00:20
Refrigeration and Air Conditioning 3 E Part 5 ppt
... fluid entering the cooler, not the log mean temperature difference (see [1 5] ). In systems where the evaporator cools air, the air itself becomes the heat transfer medium and its temperature and ... and shorten the working life. 11.11 Site pressure safety tests Site-erected pipework, once complete, must be pressure tested for safety and freedom from leaks. Pressures will be 1 .3...
Ngày tải lên: 12/08/2014, 00:20
Refrigeration and Air Conditioning 3 E Part 6 pdf
... have to be installed on site. 13. 3 One-piece packages The true packaged unit will have all the parts of the system and will be factory tested in the complete state. There are four basic types: 25°C 30 °C 35 °C 40°C ... a eutectic solution, and these are frozen down by placing these elements in the domestic deep-freeze cabinet. Once frozen, they can be used in picnic baskets, etc., for...
Ngày tải lên: 12/08/2014, 00:20
Refrigeration and Air Conditioning 3 E Part 7 pps
... hygiene, or the cheese will be damaged. Some cheeses can be frozen for long-term storage, but must then be allowed to thaw out gradually and complete their ripening before release to the market. Other ... heat exchange between milk entering and leaving the process, hot water and chilled water, in plate heat exchangers (see Figure 17. 1) in the following stages: Figure 17. 1 Plate heat e...
Ngày tải lên: 12/08/2014, 00:20
Refrigeration and Air Conditioning 3 E Part 8 pot
... estimation 215 ∆T a = temperature decrease above freezing h l = latent heat of freezing c b = specific heat capacity below freezing ∆T b = temperature decrease below freezing Some of these components will be zero ... process analysed to decide representative rates. Assumptions should be stated and agreed by the parties concerned, since these estimates are to form the basis for the selection...
Ngày tải lên: 12/08/2014, 00:20
Refrigeration and Air Conditioning Equipment Cooling Episode 1 docx
... of refrigerant. 6 REFRIGERATION AND AIR CONDITIONING IV (EQUIPMENT COOLING) Subcourse OD1750 Edition A United States Army Combined Arms Support Command Fort Lee, VA 238 01- 1809 14 Credit Hours INTRODUCTION This ... of a D/X coil solenoid valve and modulating control of a return air bypass damper. 3 SUBCOURSE EDITION OD1750 A REFRIGERATION AND AIR CONDITIONING IV...
Ngày tải lên: 12/08/2014, 16:21
Refrigeration and Air Conditioning Equipment Cooling Episode 2 docx
... 5) 21 . During gauge installation, in which position is the shutoff valve set and why? (Sec. 3, Par. 9) 22 . Where would you install a liquid line sight glass in the system? (Sec. 3, Par. 12) 23 . ... R- 12, R-13, and R -22 . As the water vaporizes, the water vapor travels from the evaporator to the absorber, where it is absorbed into the salt solution. The evaporator pump, shown in it...
Ngày tải lên: 12/08/2014, 16:21
Refrigeration and Air Conditioning Equipment Cooling Episode 3 pdf
... Resume normal operation by filling 31 TABLE 11 TABLE 12 TABLE 13 41 Figure 33 . Pressure and temperature curve. Figure 34 . Seal water system. 36 (6) Purge cooling coil (keeps purge solution ... closed cycle to the cooling coils. This refrigeration effect is known as flash cooling. 5. In reference to item 3 of figure 28, note the addition of the generator and accessory...
Ngày tải lên: 12/08/2014, 16:21
Refrigeration and Air Conditioning Equipment Cooling Episode 6 pps
... scale, the refrigeration man knows that corrosion is a constant problem. Let us now study corrosion, its causes, its effects, and its control. 22. Corrosion 1. In the refrigeration/ air- conditioning ... (Sec. 16, Par. 3) 43. Where is the weir and trap located on the purge unit? (Sec. 16, Par. 3) 44. High head pressure indicates that ___________________. (Sec. 16, Par. 5) 45. How i...
Ngày tải lên: 12/08/2014, 16:21
Refrigeration and Air Conditioning Equipment Cooling Episode 8 doc
... ___________________. (Sec. 28, Par. 2) 18. When is it necessary to pipe water from a clean water source to the stuffing box? (Sec. 28, Par. 3) 19. Why is exact packing tightening important? (Sec. 28, Par. 4) 20. ... Figure 88 . Electron flow in a diode. term “diode” refers to the number of elements within the tube envelope (di meaning two) rather than to any specific application, as shown...
Ngày tải lên: 12/08/2014, 16:21
Refrigeration and Air Conditioning Equipment Cooling Episode 10 ppsx
... following systems are typical examples of how electronics is applied to the control of air- conditioning and equipment cooling systems. The control sequence is given for each application. 6. Refrigerant ... matter or air bubbles; the best control for this type of corrosion is a good filtration system, and air purging valves installed in the highest point of the water system. (...
Ngày tải lên: 12/08/2014, 16:21