Moisture will condense at 100% RH. This means the 35 degree C at 50% RH will have to cool down to 18.5 degree C DBT = 18.5 degree C Wet bulb temperature. Initial enthalpy 64 kJ/kg. final enthalpy - 53 kJ/kg
A room is at 35°C DB and 50% RH. An air-conditioning unit starts to cool the...
3. Room-1 is at 20°C DB and 80% RH. Room-2 is at 25°C DB and 40% RH. Which room has the higher heat content? Use ASHRAE psychrometric chart. 4. A room is at 35°C DB and 50% RH. An air-conditioning unit starts to cool the air. At what temp will the moisture in the air start to condense? What are the initial and final enthalpies and humidity ratios?
A summer air conditioning system with recirculating air stream and BPF = 0 has a room sensible heat load of 20 kW and a room latent heat load of 2.22 kW. The required inside conditions are 22°C and 50% RH, and the outdoor design conditions are 36°C and 60% RH. The mass flow rate of the outside air is 15% of the mass flow rate of the supply air. Find a) RSHF b) the point s on the chart, mass...
explain please 3. 0.5 m3/s of return air from the room at 24°C DB temperature and 20°C WB temperatures is mixed with 0.60 m3/s of outside air at 35°C DB temperature and 60% RH. Determine: i. The humidity ratio of the mixture, W3 = a. 16.74 gw/kg da b. 17.56 gw/kg da C. 15.45 g/kg da d. 14.80 gw/kg da ii. The DB temperature of the mixture, DBT3 = a. 28.8 °C b. 27.1°C C. 30.2°C d. 26.5 °C
3. A room is to be maintained at 75 deg.F db. 3500 cfm of air is ventilated from this room. The sensible heat load on the room is 70,000 Btu/hr. From the air conditioning equation, what is the db temperature of the air ventilated from the room? The ventilated air is 30% rh. What is the wb temperature of the air ventilated from the room? What is the density of the ventilated air? What is the mass flow rate of...
(15) The required inside conditions are 24 °C and 50% RH, and the outdoor design conditions are 34° C and 40% RH. The air is supplied to the (4mx6mx3m) room. Find:- a) the specific volume of the air at the end of the process. b) moisture content at the end of process. (using the psychrometric chart) U = 4 X87 RH=50% in
Air at 80 F db and 50 percent relative humidity is recirculated from a room and mixed with outdoor air at 97 F db and 83 F wb at sea level. Determine the mixture dry bulb and wet bulb temperatures if the volume of recirculated air is three times the volume of outdoor air.
1) In a low-temperature drying operation, air at 60°C and 10% RH is being passed over diced carrots at the rate of 20 kg dry air/s. The constant rate of evaporation of water from the carrots was measured as 0.16 kg moisture/s. Estimate the temperature and RH of the air leaving the dryer. (8 pts) 2) 100 kg of bulghur with an initial moisture content of 80% on wet basis and a surface area of 12 m² is dried in...
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...
The air in a room is at 25 °C and a total pressure of 101.325 kPa . Air contains water vapor with a partial pressure of 1.76 kPa. a. Calculate the air humidity and relative humidity. b. Since you intend to use this air for drying fre sh fruits you plan to heat up the air to 50°C. Once you accomplish that, what would be the new relative humidity of the air if the moisture content is maintained? c. Intuitively...
Q 1: In an air conditioning system return air at 26°C dry-bulb temperature and 50% relative humidity is mixed with outdoor ambient air at 34°C dry-bulb temperature and 60% relative humidity. The dry air mass flow rate of outdoor air is 30% of the supply air mass flow rate to the space. The pressure is constant at 101.3 kPa. Calculate (i) the enthalpy, (ii) the humidity ratio, and (ii) the dry-bulb temperature of the supply air. (i) Compare the results...