Microsoft Word - Cengel and Boles TOC _2-03-05_.doc

Chapter 13 | 715 13–102 One compartment of an insulated rigid tank con- tains 2 kmol of CO 2 at 20°C and 150 kPa while the other ...

cen84959_ch13.qxd 4/6/05 9:35 AM Page 716 ...

Chapter 14 GAS–VAPOR MIXTURES AND AIR-CONDITIONING | 717 A t temperatures below the critical temperature, the gas phase of a sub ...

14–1
DRY AND ATMOSPHERIC AIR Air is a mixture of nitrogen, oxygen, and small amounts of some other gases. Air in the atmospher ...

below 50°C. Therefore,the enthalpy of water vapor in air can be taken to be equal to the enthalpy of saturated vapor at the same ...

where (14–10) Combining Eqs. 14–8 and 14–9, we can also express the relative humidity as (14–11a, b) The relative humidity range ...

14–3
DEW-POINT TEMPERATURE If you live in a humid area, you are probably used to waking up most summer mornings and finding th ...

night, so does the “moisture capacity” of air, which is the maximum amount of moisture air can hold. (What happens to the relati ...

14–4
ADIABATIC SATURATION AND WET-BULB TEMPERATURES Relative humidity and specific humidity are frequently used in engineering ...

Thus, Energy balance: or Dividing by m . agives or which yields (14–14) where, from Eq. 14–11b, (14–15) since f 2 100 percent. ...

on this principle is called a sling psychrometerand is shown in Fig. 14–13. Usually a dry-bulb thermometer is also mounted on th ...

14–5
THE PSYCHROMETRIC CHART The state of the atmospheric air at a specified pressure is completely speci- fied by two indepen ...

14–6
HUMAN COMFORT AND AIR-CONDITIONING Human beings have an inherent weakness—they want to feel comfortable. They want to liv ...

It did not take long for people to realize that they could not change the weather in an area. All they can do is change it in a ...

the environment is close to 100 percent. Prolonged sweating without any fluid intake causes dehydration and reduced sweating, wh ...

Most air-conditioning processes can be modeled as steady-flow processes, and thus the mass balancerelation m . inm . outcan be ...

Heating with Humidification Problems associated with the low relative humidity resulting from simple heating can be eliminated b ...

1 atm, either other charts for that pressure or the relations developed earlier should be used. In our case, the choice is clear ...

The cooling process with dehumidifying is illustrated schematically and on the psychrometric chart in Fig. 14–25 in conjunction ...

Then, Therefore, this air-conditioning unit removes moisture and heat from the air at rates of 0.131 kg/min and 511 kJ/min, resp ...