In absorption vapour systems, the refrigerant widely used is R-12.

More Questions from Heat Transfer, Refrigeration and Air Conditioning

• In a spray washing system, if the temperature of water is higher than the dry bulb temperature of entering air, then the air is
• The final relative humidity of the air during cooling and dehumidification is generally __________ than that of entering air.
• The atmospheric air at dry bulb temperature of 15°C enters a heating coil maintained at 40°C. The air leaves the heating coil at 25°C. The by-pass factor of the heating coil is
• Prandtl number (PN) is given by PN = μ.cp/k.
• The transfer of heat by molecular collision is smallest in
• A composite slab has two layers of different materials with thermal conductivities k1 and k2. If each layer has the same thickness, then the equivalent thermal conductivity of the slab will be
• The wet bulb depression indicates __________ humidity of the air.
• If the energy radiated per second per sq. cm. of the surface for wave lengths lying between λ, and λ + dλ is represented by (eλ.dλ), then eλ is called
• In case ofsensible cooling of air, the coil efficiency is given by
• When the discharge pressure is too high in a refrigeration system, high pressure control is installed to stop the compressor.

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