powerpoint ® presentation chapter 6 refrigeration systems refrigeration mechanical compression...
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PowerPoint® PresentationPowerPoint® Presentation
Chapter 6Chapter 6Refrigeration SystemsRefrigeration Systems
Refrigeration • Mechanical Compression Refrigeration •
Absorption Systems • Troubleshooting and Maintaining
Refrigeration Systems • Refrigerant Regulations • Refrigerant Handling
Refrigeration • Mechanical Compression Refrigeration •
Absorption Systems • Troubleshooting and Maintaining
Refrigeration Systems • Refrigerant Regulations • Refrigerant Handling
Chapter 6 — Refrigeration SystemsChapter 6 — Refrigeration Systems
A refrigeration system controls the absorption and rejection of heat by refrigerant to move heat from inside a cooled space to outside the cooled space.
A refrigeration system controls the absorption and rejection of heat by refrigerant to move heat from inside a cooled space to outside the cooled space.
Chapter 6 — Refrigeration SystemsChapter 6 — Refrigeration Systems
In a mechanical compression refrigeration system, a compressor is used to produce the refrigeration effect.
In a mechanical compression refrigeration system, a compressor is used to produce the refrigeration effect.
Chapter 6 — Refrigeration SystemsChapter 6 — Refrigeration Systems
Refrigerant vapor pressure charts list the saturation temperature and pressure of refrigerants.
Refrigerant vapor pressure charts list the saturation temperature and pressure of refrigerants.
Chapter 6 — Refrigeration SystemsChapter 6 — Refrigeration Systems
Refrigeration compressors include reciprocating, vane, centrifugal, and screw compressors.
Refrigeration compressors include reciprocating, vane, centrifugal, and screw compressors.
Chapter 6 — Refrigeration SystemsChapter 6 — Refrigeration Systems
Refrigerant compressors are available in hermetic and semi-hermetic configurations.
Refrigerant compressors are available in hermetic and semi-hermetic configurations.
Chapter 6 — Refrigeration SystemsChapter 6 — Refrigeration Systems
An air-cooled condenser removes heat from high-pressure refrigerant vapor by air blown across the condenser coils.
An air-cooled condenser removes heat from high-pressure refrigerant vapor by air blown across the condenser coils.
Chapter 6 — Refrigeration SystemsChapter 6 — Refrigeration Systems
Water-cooled condensers transfer heat from refrigerant vapor to water.
Water-cooled condensers transfer heat from refrigerant vapor to water.
Chapter 6 — Refrigeration SystemsChapter 6 — Refrigeration Systems
Evaporative condensers reject heat through the evaporation of water.
Evaporative condensers reject heat through the evaporation of water.
Chapter 6 — Refrigeration SystemsChapter 6 — Refrigeration Systems
A fin comb is used for condenser maintenance to straighten damaged or bent fins, which limit airflow and reduce condenser efficiency.
A fin comb is used for condenser maintenance to straighten damaged or bent fins, which limit airflow and reduce condenser efficiency.
Robinair Division, SPX CorporationRobinair Division, SPX Corporation
Chapter 6 — Refrigeration SystemsChapter 6 — Refrigeration Systems
A thermostatic expansion valve uses temperature readings at the evaporator outlet to control the rate of refrigerant flow into the evaporator.
A thermostatic expansion valve uses temperature readings at the evaporator outlet to control the rate of refrigerant flow into the evaporator.
Chapter 6 — Refrigeration SystemsChapter 6 — Refrigeration Systems
The opening and closing of a thermostatic expansion valve is controlled by the pressure in the remote bulb.
The opening and closing of a thermostatic expansion valve is controlled by the pressure in the remote bulb.
Chapter 6 — Refrigeration SystemsChapter 6 — Refrigeration Systems
An automatic expansion valve controls the temperature of the refrigerant by controlling the pressure in the evaporator.
An automatic expansion valve controls the temperature of the refrigerant by controlling the pressure in the evaporator.
Chapter 6 — Refrigeration SystemsChapter 6 — Refrigeration Systems
As refrigerant is forced through the capillary tube, it loses pressure until it is at the desired evaporator pressure.
As refrigerant is forced through the capillary tube, it loses pressure until it is at the desired evaporator pressure.
Chapter 6 — Refrigeration SystemsChapter 6 — Refrigeration Systems
An evaporator vaporizes low-pressure refrigerant liquid into a low-pressure vapor.
An evaporator vaporizes low-pressure refrigerant liquid into a low-pressure vapor.
Chapter 6 — Refrigeration SystemsChapter 6 — Refrigeration Systems
A hot-gas defrost uses hot gas from the compressor to melt frost on the evaporator.A hot-gas defrost uses hot gas from the compressor to melt frost on the evaporator.
Chapter 6 — Refrigeration SystemsChapter 6 — Refrigeration Systems
An evaporator pressure regulating valve allows two evaporators running from the same compressor to maintain different temperatures.
An evaporator pressure regulating valve allows two evaporators running from the same compressor to maintain different temperatures.
Chapter 6 — Refrigeration SystemsChapter 6 — Refrigeration Systems
Accessories are used for maintaining and controlling the flow of refrigerant in a refrigeration system.
Accessories are used for maintaining and controlling the flow of refrigerant in a refrigeration system.
Chapter 6 — Refrigeration SystemsChapter 6 — Refrigeration Systems
Pressure switches control refrigeration system temperature through changes in system pressure.
Pressure switches control refrigeration system temperature through changes in system pressure.
Ranco Inc.Ranco Inc.
Chapter 6 — Refrigeration SystemsChapter 6 — Refrigeration Systems
Ammonia systems operate at high temperatures and pressures and must have special controls and fittings to control the release of ammonia gas.
Ammonia systems operate at high temperatures and pressures and must have special controls and fittings to control the release of ammonia gas.
Chapter 6 — Refrigeration SystemsChapter 6 — Refrigeration Systems
The direction of refrigerant flow in a heat pump is controlled by a reversing valve.The direction of refrigerant flow in a heat pump is controlled by a reversing valve.
Chapter 6 — Refrigeration SystemsChapter 6 — Refrigeration Systems
Heat pumps may use air or water as the heat source.
Heat pumps may use air or water as the heat source.
Chapter 6 — Refrigeration SystemsChapter 6 — Refrigeration Systems
Chillers use chilled water to cool large building spaces.Chillers use chilled water to cool large building spaces.
Chapter 6 — Refrigeration SystemsChapter 6 — Refrigeration Systems
A cooling tower cools water from a condenser by the evaporation of water as it cascades through the tower.
A cooling tower cools water from a condenser by the evaporation of water as it cascades through the tower.
Chapter 6 — Refrigeration SystemsChapter 6 — Refrigeration Systems
Absorption systems use a generator and absorber in place of the compressor to raise system pressure.
Absorption systems use a generator and absorber in place of the compressor to raise system pressure.
Chapter 6 — Refrigeration SystemsChapter 6 — Refrigeration Systems
Gauge manifolds are used to take pressure readings, add or remove refrigerant, and remove air from a system before it is filled with refrigerant.
Gauge manifolds are used to take pressure readings, add or remove refrigerant, and remove air from a system before it is filled with refrigerant.
Chapter 6 — Refrigeration SystemsChapter 6 — Refrigeration Systems
Service valves are front-seated for isolating parts of the system, mid-seated for adding or removing refrigerant or taking system pressures, and back-seated during normal operation.
Service valves are front-seated for isolating parts of the system, mid-seated for adding or removing refrigerant or taking system pressures, and back-seated during normal operation.
Chapter 6 — Refrigeration SystemsChapter 6 — Refrigeration Systems
Refrigeration system pressure readings are taken by connecting the blue hose to the low-pressure side service valve and the red hose to the high-pressure side service valve with both gauge manifold valves front-seated.
Refrigeration system pressure readings are taken by connecting the blue hose to the low-pressure side service valve and the red hose to the high-pressure side service valve with both gauge manifold valves front-seated.
Chapter 6 — Refrigeration SystemsChapter 6 — Refrigeration Systems
A head pressure controller prevents the condenser pressure from falling too low and starving the evaporator for refrigerant.
A head pressure controller prevents the condenser pressure from falling too low and starving the evaporator for refrigerant.
Chapter 6 — Refrigeration SystemsChapter 6 — Refrigeration Systems
The EPA has established regulations under Section 608 of the Clean Air Act to regulate the handling of ozone-depleting substances.
The EPA has established regulations under Section 608 of the Clean Air Act to regulate the handling of ozone-depleting substances.
Chapter 6 — Refrigeration SystemsChapter 6 — Refrigeration Systems
A recovery unit is used to recover refrigerant for reuse.
A recovery unit is used to recover refrigerant for reuse.
Chapter 6 — Refrigeration SystemsChapter 6 — Refrigeration Systems
A leak detector is a device used to detect refrigerant leaks in air conditioning or refrigeration systems.
A leak detector is a device used to detect refrigerant leaks in air conditioning or refrigeration systems.
Chapter 6 — Refrigeration SystemsChapter 6 — Refrigeration Systems
A vacuum pump removes all air from a refrigeration system.
A vacuum pump removes all air from a refrigeration system.
Chapter 6 — Refrigeration SystemsChapter 6 — Refrigeration Systems
The vacuum pump is connected to the system service valves using a gauge manifold and hoses.The vacuum pump is connected to the system service valves using a gauge manifold and hoses.
Chapter 6 — Refrigeration SystemsChapter 6 — Refrigeration Systems
Electronic leak detectors are extremely sensitive and indicate the general location of a leak.Electronic leak detectors are extremely sensitive and indicate the general location of a leak.
Chapter 6 — Refrigeration SystemsChapter 6 — Refrigeration Systems
The refrigerant container is placed upside down to charge with liquid and right side up to charge with vapor.
The refrigerant container is placed upside down to charge with liquid and right side up to charge with vapor.