The value of C.O.P in vapour compression cycle is usually
Always less than unity
Always more than unity
Equal to unity
Any one of the above
- The advantage of dry compression is that
- During a refrigeration cycle, heat is rejected by the refrigerant in a
- A Bell Coleman refrigerator working on dense air system as compared to open air system, for the same…
- The lower horizontal line of the refrigeration cycle plotted on pressure-enthalpy diagram represents
- At lower temperatures and pressures, the latent heat of vaporisation of a refrigerant
- The refrigeration effect in a dry evaporator compared to flooded evaporator in a similar plant is
- During sensible cooling,
- The coefficient of performance is the ratio of the refrigerant effect to the
- For unsaturated air, the dew point temperature is __________ wet bulb temperature.
- The mass of water vapour present in __________ is called absolute humidity.
- In order to cool and dehumidify a stream of moist air, it must be passed over the coil at a temperature
- In refrigerators, the temperature difference between the evaporating refrigerant and the medium being…
- The wet bulb temperature at 100% relative humidity is ________ dry bulb temperature.
- Ammonia is
- The superheated vapour region, in a pressure enthalpy chart, is represented by the space
- One ton refrigeration corresponds to
- The emissivity of a polished silver body is __________ as compared to black body.
- The evolution of heat of solution takes place in ammonia absorption plant when
- The specific humidity during heating and humidification process.
- The index which correlates the combined effects of air temperature, relative humidity and air velocity…
- The boiling point of carbon dioxide is
- Efficiency of a Carnot engine is given as 80%. If the cycle direction be reversed, what will be the…
- Highest temperature encountered in refrigeration cycle should be
- Aqua ammonia is used as refrigerant in the following type of refrigeration system
- Which of the following refrigerant has the lowest freezing point?
- A human body feels comfortable when the heat produced by the metabolism of human body is equal to the
- A heat pump working on a reversed Carnot cycle has a C.O.P. of 5. It works as a refrigerator taking…
- One ton of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of…
- The value of C.O.P in vapour compression cycle is usually
- A vapour absorption refrigeration system