FOOD ENG Q's
How much heat must be removed in order to cool air at 37oC dry bulb and 40% relative humidity to a temperature of 30oC without any loses in moisture?
a.Draw the process on the Chart on this page(labelstate 1 and state 2)
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The atmospheric air 32 °C dry bulb temperature and 70% relative humidity supplied to the cooling...
The atmospheric air 32 °C dry bulb temperature and 70% relative humidity supplied to the cooling coil at a rate of 45m3/min. The air cooling to the saturated state and leaving at a temperature of 16 °C. Determine: a- Specific humidity at each state. b- Wet bulb and dew point temperatures at the final state c- Final relative humidity. d- Mass of water condensed. e- Rate of heat removed from the air in kW. f- Show the process on Psychrometric...
150 ft3/min of air at 80F dry-bulb temperature and 70% relative humidity enters an air conditioning...
150 ft3/min of air at 80F dry-bulb temperature and 70% relative humidity enters an air conditioning unit and leaves it as saturated air at 50F. Part of the moisture in the air that condensate is collected and removed at 55F. Draw the cycle on the attached chart and a)Determine the rates of heat removal from the air. b)Determine the rate of moisture removal from the air
3. Air at a dry bulb temperature of 40C and a wet bulb temperature of 20C...
3. Air at a dry bulb temperature of 40C and a wet bulb temperature of 20C is first heated in a heater to a dry bulb temperature of 90C. Then it is passed through a bed of apricot slices to dry them. The air exiting from the top of the apricot bed is at a dry bulb temperature of 60C. It is then passed through a dehumidifier to reduce its relative humidity to 10%. Clearly show the various paths of...
THERMODYNAMICS PROBLEM 1. Explanation and concept question Under what conditions, if any, the mass fractions and...
THERMODYNAMICS PROBLEM
1. Explanation and concept question Under what conditions, if any, the mass fractions and mole fractions of a mixture would be the same? а. (1 Mark) b A moist air sample undergoes a purely humidification process (increase in specific humidity only). Which one of the following properties will increase, decrease, or not change; relative humidity, wet bulb temperature, dry bulb temperature, and enthalpy of the moist air sample. The dry bulb temperature, the relative humidity, total pressure, and...
4 pts)_1-ALGIVEN: Steam Tables and "Psych Chart" for atmospheric air at std. atm. pressure LET: DB...
4 pts)_1-ALGIVEN: Steam Tables and "Psych Chart" for atmospheric air at std. atm. pressure LET: DB dry bulb temperature DP dew point temperature CIRCLE THE BEST ANSWER a) A constant humidity ratio process will have approximately constant b) The relative humidity value can be determined given humidity ratio and DB DP c) The mol fraction of H:0 vapor in air at std. pressure can be found given just DB DP d) The mixture enthalpy value can be determined given humidity...
u ut slatept I. 5. A dehumidifier is used to extract excess moisture from the air...
u ut slatept I. 5. A dehumidifier is used to extract excess moisture from the air inside a room with dimensions 8x6x3 m3. The room was initially at a dry bulb temperature of 30°C, 70% relative humidity and ends up to a wet bulb temperature of 11°C, 100% relative humidity. If the dry air density is 1.2 kg/m3, what mass of water vapour has been removed by the dehumidifier?
for the process. 13) Saturat drier uses silica geD absorbent. The air is then passed though a cooler untiaits final...
for the process. 13) Saturat drier uses silica geD absorbent. The air is then passed though a cooler untiaits final temperature i21 without a change in its specifie humidity. Determine: i The temperature of air at the end of the drying process ii) The heat rejected during the cooling process iii) The relative humidity at the end of the cooling process iv) The dew point temperature at the end of the drying process v) Moisture removed during the drying process...
The weather report indicates that the temperature outside is 15°C with a relative humidity of 75%....
The weather report indicates that the temperature outside is 15°C with a relative humidity of 75%. Using this information, provide the following: a) Wet bulb temperature b) Dew point temperature c) Moisture content of the outside air d) Specific volume of the outside air e) Enthalpy of the outside air f) How much moisture would you need to add to the air in order to saturate it? (Give this answer in kg moisture/kg dry air). g) The air temperature in...
On a typical autumn day, outside air with a dry bulb temperature of 15°C and 40%...
On a typical autumn day, outside air with a dry bulb temperature of 15°C and 40% relative humidity is brought into a processing facility where it is to be used for a controlled storage chamber. The air must be heated to 37°C and humidified to 90% relative humidity. Calculate: (11 marks total) The relative humidity of the air when it is heated to 37°C, but BEFORE it is humidified. (No water has been added to the air yet). (2 marks)...
Please explain every thing and show me even your small detail >> thank you (its very...
Please explain every thing and show me even your small detail
>> thank you (its very important to me)
Saturated air at 40 F is first preheated and then saturated adiabatically. This saturated air is then heated to a final condition of 105F and 28% RH. To what temperature must initially be heated in the preheat coil? (use Psychrometry chart & Show all detail statements in your answer.) Find a) Show the processes on the psychrometric chart. b) To what...
THERMODYNAMICS PROBLEM
1. Explanation and concept question Under what conditions, if any, the mass fractions and mole fractions of a mixture would be the same? а. (1 Mark) b A moist air sample undergoes a purely humidification process (increase in specific humidity only). Which one of the following properties will increase, decrease, or not change; relative humidity, wet bulb temperature, dry bulb temperature, and enthalpy of the moist air sample. The dry bulb temperature, the relative humidity, total pressure, and...
4 pts)_1-ALGIVEN: Steam Tables and "Psych Chart" for atmospheric air at std. atm. pressure LET: DB dry bulb temperature DP dew point temperature CIRCLE THE BEST ANSWER a) A constant humidity ratio process will have approximately constant b) The relative humidity value can be determined given humidity ratio and DB DP c) The mol fraction of H:0 vapor in air at std. pressure can be found given just DB DP d) The mixture enthalpy value can be determined given humidity...
u ut slatept I. 5. A dehumidifier is used to extract excess moisture from the air inside a room with dimensions 8x6x3 m3. The room was initially at a dry bulb temperature of 30°C, 70% relative humidity and ends up to a wet bulb temperature of 11°C, 100% relative humidity. If the dry air density is 1.2 kg/m3, what mass of water vapour has been removed by the dehumidifier?
for the process. 13) Saturat drier uses silica geD absorbent. The air is then passed though a cooler untiaits final temperature i21 without a change in its specifie humidity. Determine: i The temperature of air at the end of the drying process ii) The heat rejected during the cooling process iii) The relative humidity at the end of the cooling process iv) The dew point temperature at the end of the drying process v) Moisture removed during the drying process...
The weather report indicates that the temperature outside is 15°C with a relative humidity of 75%. Using this information, provide the following: a) Wet bulb temperature b) Dew point temperature c) Moisture content of the outside air d) Specific volume of the outside air e) Enthalpy of the outside air f) How much moisture would you need to add to the air in order to saturate it? (Give this answer in kg moisture/kg dry air). g) The air temperature in...
Please explain every thing and show me even your small detail
>> thank you (its very important to me)
Saturated air at 40 F is first preheated and then saturated adiabatically. This saturated air is then heated to a final condition of 105F and 28% RH. To what temperature must initially be heated in the preheat coil? (use Psychrometry chart & Show all detail statements in your answer.) Find a) Show the processes on the psychrometric chart. b) To what...
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