Question

In: Mechanical Engineering

An air-conditioned room is to be maintained at 18oC, percentage saturation 40%. The fabric heat gains...

An air-conditioned room is to be maintained at 18oC, percentage saturation 40%. The fabric heat gains are 3000 W and there are a maximum of 20 people in the room at any time. Neglecting all other heat gains or losses calculate the required volume flow rate of air to be supplied to the room and its percentage saturation when the air supply temperature is 10oC. (Sensible heat gains per person = 100 W; latent heat gains per person = 30W; barometric pressure = 1.01325 bar)

Solutions

Expert Solution


Related Solutions

In a certain space to be air conditioned the sensible and latent heat loads are 20.60...
In a certain space to be air conditioned the sensible and latent heat loads are 20.60 kW and 6.78 kW, respectively. Outside air is at 33 degrees dry bulb and 24 degrees wet bulb temperatures. The space is to be maintained at 25 degrees with a relative humidity not exceeding 50%. All outside air is supplied with reheater. The conditioned air enters at 18 degrees. Determine 1. The refrigeration load required 2. The capacity of the supply fan, and 3....
It is required to maintain the air in a building at 20oC and 40% saturation when...
It is required to maintain the air in a building at 20oC and 40% saturation when the outside conditions are 28oC, 50% saturation with a barometric pressure of 1.01325 bar. The total heat gains to the room (sensible plus latent) are 15 kW, and the latent heat gains are 3 kW. There is no reciculation and the fresh air passes over a cooling coil to dehumidify it, and then a heater, before entering the room. The cooling coil by pass...
An air-conditioned zone is at 72°F and 40% relative humidity. The total heating load of the...
An air-conditioned zone is at 72°F and 40% relative humidity. The total heating load of the space is 300,000 Btu/hr, out of which 60,000 Btu/hr is latent heating load. To maintain an appropriate indoor air quality 1000 CFM of outdoor air at 30°F and 80% relative humidity is required. Determine: a) flow rate of supplied air at 25 °F above the zone temperature b) total heating unit load c) amount of water required for the humidifier Please show diagrams in...
A double-pipe heat exchanger is used to condense steam at 40°C saturation temperature. Water at an...
A double-pipe heat exchanger is used to condense steam at 40°C saturation temperature. Water at an average bulk temperature of 20°C flows at 2 m/s through the inner tube (copper, 2.54 cm ID, 3.05 cm OD). Steam at its saturation temperature flows in the annulus formed between the outer surface of the inner tube and outer tube of 6 cm ID. The average heat transfer coefficient of the condensing steam is 6,000 W/m2 ? K, and the thermal resistance of...
The air-conditioned room which stands in a ventilated basement measuring length, width, height 6m x 3m...
The air-conditioned room which stands in a ventilated basement measuring length, width, height 6m x 3m x 3m. one of the two 3m walls faces west and has a double glass window measuring 1.5 m x 1.5 m, mounted on a wall without external shading. There is no heat gain through the wall other than the wall facing west. Calculate sensible heat, latent heat, and total heat in the room. How much cooling capacity is needed? Inside conditions: 25 Celsius...
6 m3/s recirculated room air at 22oC Tdb and 50% saturation, is mixed with 1.5 m3/s...
6 m3/s recirculated room air at 22oC Tdb and 50% saturation, is mixed with 1.5 m3/s of incoming fresh air at 10oC Tdb and 6oC Twb. Determine all properties of the mixed air that you can get form the psychrometric chart (APPENDIX 2).
On a hot summer day (95°F), you walk outside from an air-conditioned room (75°F) watching TV...
On a hot summer day (95°F), you walk outside from an air-conditioned room (75°F) watching TV and begin jogging. Describe how your body reacts physiologically to the change in temperature. Be sure to include the following terms: set point, normal range, homeostasis, stimulus, sensor, input signal, integrating center, output signal, target and response (10 pts), include examples of tissues and organs that make up the sensor, input signal, integrating center, output signal, target (5 pts).
Transient heat transfer Leaking steam completely fills a room, pushing out all of the air. The...
Transient heat transfer Leaking steam completely fills a room, pushing out all of the air. The steam is at atmospheric pressure. Because the mortar cement siding walls are initially cool, at a uniform temperature of 22C, the steam begins to condense on the walls. Find the rate of condensation per square meter of wall at (a) 10 s and (b) 30 s after the leak. The wall is 10 cm thick, and you may assume that the other side of...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT