VIII -. Refrigerants and Lubricants
A. - B. Nature of Electricity - Electrical Quantities C. - Automotive Electrical Components D. - E. Basic Electrical Circuits - F. Starters - Alternators G. - Automotive Batteries h -. Course Ignition Systems Automotive Mechanic
A. - B. Basic Structure - C. Train and Suspension - Steering Systems D. - E. Brake Systems - Engine Combustion F. - G. Cooling System - Exhaust System H. - I. Broadcast System - J. Basic Electrical System - Carburetors K. - L. Injection System - M. Spendable Automotive - Maintenance Cycles and Refrigeration Automotive Misses crock pot lunch crock food warmer Basics Course
It is known that the main function of the device is to produce cold air picking up heat from the ambient air, as all fluid absorbs heat, refrigerants are used in air conditioning for its ability to absorb heat. These fluids crock pot lunch crock food warmer must meet a number of features for optimal effectiveness:
Favorable characteristics of pressure and temperature to ensure that the pressures are not very high in the condenser and evaporator too low value high latent heat of evaporation in order to achieve crock pot lunch crock food warmer greater effect refrigerator value of the critical temperature high enough to prevent the compressor compresses crock pot lunch crock food warmer the fluid to a pressure above the critical pressure, in which case no change of state occur in the condenser temperature lower evaporation at room temperature Safety crock pot lunch crock food warmer against fire and explosion Chemical stability and material compatibility that make up the circuit Low toxicity to avoid damage to persons handling Miscibility with lubricating oil used
Types of fluids: CFC: Chlorofluorocarbons (Example R12, R11, R502) are compounds of chlorine, fluorine and carbon. Contribute to the destruction of the ozone layer HCFC: hydrochlorofluorocarbons (Example R22, D124): They are compounds of chlorine, fluorine, carbon and hydrogen. Contribute to the destruction of the ozone layer and global warming through the greenhouse effect. HFCs: hydrofluorocarbons (Example crock pot lunch crock food warmer R134a, ISCEON 49) are compounds of fluorine, crock pot lunch crock food warmer carbon and hydrogen. Contribute to global crock pot lunch crock food warmer warming through the greenhouse effect
Dichlorodifluoromethane (C Cl2 F2) called R-12 or Freon 12 is a fluid characterized by a high heat of evaporation. It belongs to the family of chlorofluorocarbons, CFCs. Its boiling point is -29.4 C at atmospheric pressure. Exhibits high stability at high temperatures and non-reactive with most metals (except zinc and magnesium) also does not deteriorate the rubber tubing, however in the presence of water is highly corrosive because the reaction produces hydrochloric acid. Under normal conditions it is a colorless gas with a slight odor and produces no stains. It is miscible with mineral lubricating oils, taking crock pot lunch crock food warmer the necessary precautions crock pot lunch crock food warmer in the sizing of the pipes in order to ensure oil return to the compressor.
Under normal conditions it is not flammable or explosive, both liquid and gaseous state, however if it comes into contact with a flame or a hot metal decomposes into phosgene gas (mustard gas) which is a very poisonous gas, plus no should be contacting the fluid with eyes, because they can cause frostbite.
Unfortunately this compound rapidly reaches the upper layers of the atmosphere where the ozone, O3, is situated at an altitude of 15 km. and can remain for 120 years. Due to the effect of ultraviolet rays, the chemical degradation of R-12 is produced, releasing chlorine molecules, which react with ozone, an oxygen capturing, decreasing the concentration of ozone in the area. A chlorine molecule crock pot lunch crock food warmer can destroy between 50,000 and 100,000 ozone molecules. The ozone layer surrounding the earth's stratosphere level ensures protection against lightning
UV, which attack the human and animal organism and plant life. In addition, this layer limits the greenhouse crock pot lunch crock food warmer effect, keeping the heat balance of the planet by reflecting infrared rays toward Earth. Thus, the destruction of the ozone layer will cause the penetration of UV rays, with the consequent risk to the health and global warming.
The alternative to R-12 is tetrafluoroethane (CH2F-CF3) which belongs to the family of Hidrogenofluorocarbonos (HFC), its boiling point is -26.3 C at atmospheric pressure, so it presents a low toxicity, in the same so that the R-12, is not flammable under normal crock pot lunch crock food warmer conditions, yet is corrosive in the presence of water, since hydrogen fluoride is produced, is not miscible with mineral oils but
A. - B. Nature of Electricity - Electrical Quantities C. - Automotive Electrical Components D. - E. Basic Electrical Circuits - F. Starters - Alternators G. - Automotive Batteries h -. Course Ignition Systems Automotive Mechanic
A. - B. Basic Structure - C. Train and Suspension - Steering Systems D. - E. Brake Systems - Engine Combustion F. - G. Cooling System - Exhaust System H. - I. Broadcast System - J. Basic Electrical System - Carburetors K. - L. Injection System - M. Spendable Automotive - Maintenance Cycles and Refrigeration Automotive Misses crock pot lunch crock food warmer Basics Course
It is known that the main function of the device is to produce cold air picking up heat from the ambient air, as all fluid absorbs heat, refrigerants are used in air conditioning for its ability to absorb heat. These fluids crock pot lunch crock food warmer must meet a number of features for optimal effectiveness:
Favorable characteristics of pressure and temperature to ensure that the pressures are not very high in the condenser and evaporator too low value high latent heat of evaporation in order to achieve crock pot lunch crock food warmer greater effect refrigerator value of the critical temperature high enough to prevent the compressor compresses crock pot lunch crock food warmer the fluid to a pressure above the critical pressure, in which case no change of state occur in the condenser temperature lower evaporation at room temperature Safety crock pot lunch crock food warmer against fire and explosion Chemical stability and material compatibility that make up the circuit Low toxicity to avoid damage to persons handling Miscibility with lubricating oil used
Types of fluids: CFC: Chlorofluorocarbons (Example R12, R11, R502) are compounds of chlorine, fluorine and carbon. Contribute to the destruction of the ozone layer HCFC: hydrochlorofluorocarbons (Example R22, D124): They are compounds of chlorine, fluorine, carbon and hydrogen. Contribute to the destruction of the ozone layer and global warming through the greenhouse effect. HFCs: hydrofluorocarbons (Example crock pot lunch crock food warmer R134a, ISCEON 49) are compounds of fluorine, crock pot lunch crock food warmer carbon and hydrogen. Contribute to global crock pot lunch crock food warmer warming through the greenhouse effect
Dichlorodifluoromethane (C Cl2 F2) called R-12 or Freon 12 is a fluid characterized by a high heat of evaporation. It belongs to the family of chlorofluorocarbons, CFCs. Its boiling point is -29.4 C at atmospheric pressure. Exhibits high stability at high temperatures and non-reactive with most metals (except zinc and magnesium) also does not deteriorate the rubber tubing, however in the presence of water is highly corrosive because the reaction produces hydrochloric acid. Under normal conditions it is a colorless gas with a slight odor and produces no stains. It is miscible with mineral lubricating oils, taking crock pot lunch crock food warmer the necessary precautions crock pot lunch crock food warmer in the sizing of the pipes in order to ensure oil return to the compressor.
Under normal conditions it is not flammable or explosive, both liquid and gaseous state, however if it comes into contact with a flame or a hot metal decomposes into phosgene gas (mustard gas) which is a very poisonous gas, plus no should be contacting the fluid with eyes, because they can cause frostbite.
Unfortunately this compound rapidly reaches the upper layers of the atmosphere where the ozone, O3, is situated at an altitude of 15 km. and can remain for 120 years. Due to the effect of ultraviolet rays, the chemical degradation of R-12 is produced, releasing chlorine molecules, which react with ozone, an oxygen capturing, decreasing the concentration of ozone in the area. A chlorine molecule crock pot lunch crock food warmer can destroy between 50,000 and 100,000 ozone molecules. The ozone layer surrounding the earth's stratosphere level ensures protection against lightning
UV, which attack the human and animal organism and plant life. In addition, this layer limits the greenhouse crock pot lunch crock food warmer effect, keeping the heat balance of the planet by reflecting infrared rays toward Earth. Thus, the destruction of the ozone layer will cause the penetration of UV rays, with the consequent risk to the health and global warming.
The alternative to R-12 is tetrafluoroethane (CH2F-CF3) which belongs to the family of Hidrogenofluorocarbonos (HFC), its boiling point is -26.3 C at atmospheric pressure, so it presents a low toxicity, in the same so that the R-12, is not flammable under normal crock pot lunch crock food warmer conditions, yet is corrosive in the presence of water, since hydrogen fluoride is produced, is not miscible with mineral oils but
No comments:
Post a Comment