Refrigeration and Air Conditioning Equipment Cooling Episode 6 pps

... transfer at the interface and this simplifies predictions of the performance of air-conditioning coils [1, 5, 9]. Refrigeration and Air-Conditioning Preface Refrigeration and its application is ... of suction gas 3. Non-corrosive, non-toxic and non-flammable 4. Critical temperature and triple point outside the working range 38 Refrigeration and Air-Conditioning throw...

Ngày tải lên: 05/03/2014, 19:20

... 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

... 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

... 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

... 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

... connecting the inner and outer tappings to the ends of the manometer, the difference will be the velocity pressure. Figure 27.2 Vertical and inclined manometers Figure 27 .3 Pitot tube Sensitive and ... through the surface, some will be absorbed in warming the outer layers and there will be a time lag before the effect reaches the inner face, depending on the mass, conductivity and...

Ngày tải lên: 12/08/2014, 00:20

... to the process exceeds the load. (See Figure 31 .2.) The range of the control will therefore be the differential of the detector plus the upper and lower overshoots under load. Upper limit Overshoot Set ... condensation or ice on cold surfaces. 34 .6 Excess condenser pressure This is the greatest cause of excess power and loss of duty in a refrigeration system. Causes are: 33 0 Ref...

Ngày tải lên: 12/08/2014, 00:20

... higher condensing temperature will be a drop in the refrigerating effect, since the liquid enters the expansion valve hotter, and a decrease in volume pumped due to the lower volumetric efficiency. ... separate budgets, possibly accounted for by four different managers, so these budgets need to be adjusted. Separate fuel meters are needed to prove the savings, which might otherwise be held...

Ngày tải lên: 12/08/2014, 00:20

... 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

... 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

... 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

... 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

... ___________________. (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

... 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

... cooler Throttle valve Solenoid valve 92 Refrigeration and Air- Conditioning Where the surrounding air is always at + 4 C or higher, it will be sufficient to stop the refrigerant for a period and allow the frost to melt ... sleeve and is used to detect the position of the 110 Refrigeration and Air- Conditioning 9.7 Solenoid valves Electrically operated shut-off valves (F...

Ngày tải lên: 13/08/2014, 17:20