refrigeration and air conditioning compressors

... addresses HFC and PFC emissions from users of refrigeration and air con­ ditioning equipment including household refriger­ ation, domestic air conditioning and heat pumps, mobile air conditioning, ... www.epa.gov/climateleaders Office of Air and Radiation CLIMATE LEADERS GREENHOUSE GAS INVENTORY PROTOCOL CORE MODULE GUIDANCE Direct HFC and PFC Emissions from Use of Refrigeration and Air Conditioning Equipment ... estimating HFC and PFC emissions from refrigeration and air conditioning equip­ ment use This method requires available data on the total inventory of refrigerants at the beginning and end of the

Ngày tải lên: 08/03/2014, 19:20

... Disconnect the valve and plug the tube ends Remove the screen and clean it with a recommended cleaning solvent After the screen is clean and dry, reinstall it in the valve and connect the valve ... compressor, and start the unit Figure 20 shows two different types of strainers, basket and disc, and their location in the compressor motor 10 Purging noncondensable gases Noncondensable gases (air) ... indicated loss of capacity and the discharge valves check properly, you must remove the head and valve plate and check the valves physically 17 Disassembly, inspection, and reassembly of valve plates

Ngày tải lên: 12/08/2014, 16:21

... 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 evaporator tubes and air-conditioning ... chilled water and condensing water circuits (2) Fill the condensing water circuit (3) Start the purge unit to remove all air and nitrogen from the machine (4) Fill the primary and secondary chilled ... F Explosion-proof controls and motor are installed for special applications Refer to the manufacturer's manual on the operation and maintenance of these controls and motors 12 Thermometers

Ngày tải lên: 12/08/2014, 16:21

... WATER USED IN air-conditioning systems may create problems with equipment, such as scale, corrosion, and organic growths Scale formation is one of the greatest problems in air-conditioning systems ... process which changes calcium and magnesium compounds from soluble to insoluble forms and then removes these insolubles by sedimentation and filtration The second and most common is zeolite or ... villain Calcium carbonate is the chief scale-forming deposit found in air-conditioning systems, but magnesium carbonate and calcium sulfate can also cause some degree of scaling. 2 Causes of

Ngày tải lên: 12/08/2014, 16:21

... cathode, and the potential (voltage) between the cathode and the plate Refer to figure 89, a diagram of a simple diode rectifier circuit 10 When an a.c source is connected to the plate and cathode ... that the center tap current is turned to ground and then through R and inductor L to the cathode (filament) of V1 The voltage appearing across X and Y is 700 volts a.c The center tap is at zero ... voltage is applied between the cathode and the grid, it will cause a change in grid bias and thus vary plate current This small a.c voltage between cathode and grid is called a signal 16 The large

Ngày tải lên: 12/08/2014, 16:21

... Motor Servicing The only repairs that can be accomplished in the field are cleaning the potentiometer or limit switch contacts, repairing internal connecting wires, and replacing the internal ... the motor Disconnect the motor terminals (usually numbered 1, 2 and 3) and connect the transformer output leads to terminals 2 and 3 The motor should run clockwise, if it is not already at that ... definite characteristics-flexibility, sensitivity, simplicity, speed, and accuracy-that show to best advantage in an air-conditioning system where signals from several controllers must be coordinated

Ngày tải lên: 12/08/2014, 16:21

... evaporators Liquid cooling is mostly in shell-and-tube or shell-and-coil evaporators In the shell-and-tube type, the liquid is usually in the pipes andthe shell is some three-quarters full of the ... water-collection tank and a thin film of water runs overthe tubes Heat transfer is very high with a thin moving film ofliquid and, if any ice forms, it will be on the outside, free to expand,and it will ... forammonia Frost or condensed water will form on the fin surfaceand must be drained away To permit this, fins will be vertical andthe air flow horizontal, with a drain tray provided under The size

Ngày tải lên: 13/08/2014, 17:20

... (SHF) Psychometric Processes in Air Conditioning Equipment Summer Air Conditioning-apparatus Dew Point (RSHF, GSHF, TSH, GTH, Minimum quantity of air (cmm) min ) Air refrigeration system Boot-strap ... (WBT) Adiabatic saturation of air and adiabatic saturation temperature Heating and humidification Cooling and dehumidification Cooling and humidification Heating and dehumidification Sensible ... ra t ion a nd Air-c ondit ioning 1 Heat Pump and Refrigeration cycles and systems Heat Engine, Heat Pump Reversed Carnot Cycle Liquefaction of Gases Production of Solid Ice Refrigeration capacity

Ngày tải lên: 09/03/2016, 10:36

... transport, handling and distribution 208 21 Refrigeration load estimation 214 22 Industrial uses of refrigeration 223 23 Air and water vapour mixtures 227 24 Air treatment cycles 240 25 Practical air ... source of leakage, and this was sealed with apacked gland Trang 2338 Refrigeration and Air-Conditioning4.3 Valves Piston compressors may be generally classified by the type of valve, and this depends ... seals.Small compressors will be fully hermetic, i.e having the motor and all working parts sealed within a steel shell, and so not accessible for Trang 2746 Refrigeration and Air-Conditioning Compressors

Ngày tải lên: 08/03/2018, 15:25

... to Refrigeration and Air - ConditioningBell – Coleman / Reverse Bryaton Cycle Elements of this system : Cold Air Very Cold Air Warm Air Hot Air Trang 19Introduction to Refrigeration and Air - ConditioningBell ... 7Introduction to Refrigeration and Air - ConditioningRefrigeration Systems 1 Ice Refrigeration System 2 Air Refrigeration System 2 Vapour Compression Refrigeration System 4 Vapour Absorption Refrigeration ... to Refrigeration and Air - ConditioningRefrigeration - Applications 1 Ice making 2 Transportation of food items above and below freezing 2 Industrial Air – Conditioning 4 Comfort Air – Conditioning

Ngày tải lên: 20/11/2018, 19:16

... 5Unit 6 Heat pump and heat recovery 66 Unit 7 Careers and job aids 76 Trang 65 TỪ VIẾT TẮT DÙNG TRONG GIÁO TRÌNH British thermal unit Recovery Btu Heating, Ventilation and Air Conditioning HVAC ... compressor It must prevent refrigerant and oil from ……….and prevent air and moisture from entering the compressor Two types of seals are used—the stationary bellows seal and the rotating bellows seal ... equipment When installing a refrigeration or air-conditioning plant, you must not allow dirt, scale, sand, or moisture to enter any part of the refrigerant system Since air contains moisture, its

Ngày tải lên: 12/02/2020, 20:00

... Course Title Prerequisites Refrigeration and Air Conditioning Major Mechanical Technology Air Conditioning Systems and Equipment RAC 111 & RAC 112 Refrigeration and Air Conditioning Code RAC 202 ... Course Title Prerequisites Refrigeration and Air Conditioning Major Mechanical Technology Refrigeration Systems and Equipment RAC 111 & RAC 112 Refrigeration and Air Conditioning Code RAC 201 ... Desert Air Coolers Components of Simple Ref & A/C Units Car A/C Systems - 28 - Department of Mechanical Technology References: Refrigeration and Air Conditioning “Modern Refrigeration and Air Conditioning ...

Ngày tải lên: 01/04/2014, 00:20

... energy (Figure 2.12) The refrigeration cycle 27 Air inlet Cooling air out Expander Cold air to process Heat exchanger Compressor Cooling air in Fan Figure 2.12 2.11 Air cycle cooling Thermoelectric ... glass seals Small compressors will be fully hermetic, i.e having the motor and all working parts sealed within a steel shell, and so not accessible for 46 Refrigeration and Air- Conditioning (a) ... plant room and into the atmosphere If the plant room is outside or on the roof of a building, the escaping ammonia will drift away from the refrigeration plant 34 Refrigeration and Air- Conditioning...

Ngày tải lên: 12/08/2014, 00:20

... condenser, and manufacturers will give ratings for ‘standard’ and ‘quiet’ products It will be recognized that the low specific heat capacity and high 66 Refrigeration and Air- Conditioning Figure 6.2 Air- cooled ... filtered and kept dry The oil as seen through the crankcase sight glass should remain 62 Refrigeration and Air- Conditioning transparent If it takes on a white, emulsified appearance it is wet and ... pressure and lowest power Air- cooled surfaces may be cleaned by brushing off the accumulation of dust and fluff where the air enters the coil, by the combination of a high-pressure air hose and a...

Ngày tải lên: 12/08/2014, 00:20

... tentative temperature differences of 15 K and 12 K 126 Refrigeration and Air- Conditioning Table 10.2 Climate Air- cooled Evaporative Dry bulb (°C) South UK Scotland Mediterranean Desert Tropical humid ... this, insulate the pipe 11.9 Vibration Compressors and pumps will transmit vibration to their connecting pipework 136 Refrigeration and Air- Conditioning Water and brine pumps may be isolated with ... custom-built systems and, for these, selected outside a factory 128 Refrigeration and Air- Conditioning It is usual to select a thermostatic expansion valve for the maximum duty and at the summer...

Ngày tải lên: 12/08/2014, 00:20