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Atmospheric air enters an air-conditioning system at 30°C and 70 percent relative humidity with a volume flow rate of 4 m3 /min and is cooled to 20°C and 20 percent relative humidity at a pressure of 1 atm. The system uses refrigerant- 134a as the cooling fluid that enters the cooling section at 350 kPa with a quality of 20 percent and leaves as a saturated vapor. Draw a schematic and show the process on the psychrometric chart. What is the heat transfer from the air to the cooling coils, in kW? If any water is condensed from the air, how much water will be condensed from the atmospheric air per min? Determine the mass flow rate of the refrigerant, in kg/min.
The cross-sectional area of the sample was 60 cm2 and its length was 150 mm. For 80 cm3/min steady-state flow rate, a total head difference of 8 cm was measured across two points separated by 10 cm along the axis of the sample.
A 45-percent efficient, coal-fired power plant generates output power of 1000 MW (106 kW) and emits SO2 at the legally allowable rate of 0.6 lb SO2 per million BTU of heat into the plant. The stack has an effective height of 250 m.
A nozzle discharges a stream of water with an initial velocity v0 of 50 ft/s into the end of a horizontal pipe of inside diameter d=5ft. determine the largest distance x that the stream can reach.
Two bridge designs have been proposed for the new interstate highway to cross Detroit Michigan to Windsor, Ontario. A bridge constructed from wood will cost $6000 and will last for eight years.
How many pounds of coal must be burned to keep one 100 watt light bulb lit for one hour? Assume efficiency of the power plant is 35%, the transmission losses are 10% fo the delivered poer, and the heating value of coal is 12,000 BTU/lb
If the fre- quency of simple harmonic motion is 13/pi cycles/s, what is the spring constant k What is the frequency of simple harmonic motion if the original mass is replaced with an 288 pound mass
he concentration of carbon in an iron-carbon alloy is 0.15 wt%. What is the concentration in kilograms of carbon per cubic meter of alloy
If a tank contains 1000 kg of the dilute acid and the concentrated acid is added at a rate of 100 kg/min, how long will it take to bring dilute acid strength to 75 wt% H2PO4? What will be the final chemical composition and weight of the final mixture..
A cube of moist soil weighs 330 lb and has a volume of 3.00 ft3. Its moisture content is 27.0% and the specific gravity of solids is 2.72. Compute the void ratio, porosity, degree of saturation, unit weight and dry unit weight of this soil.
The vertical post is secured by three cables. The cables are pre-tensioned so that the resultant of the cable forces F, Q, and P is directed along the z-axis. If F =120lb, find P and Q.
Write an essay on the topic "application of geophysical techniques using electromagnetic induction as a tool for sustainable soil and water management of agricultural fields in the humid tropic Caribbean. components:
A 50 meter wide rectangular channel is carrying a flow of 250 m3/s at a flow depth of 5 meters. To produce critical flow in this channel, determine a.) the height of the step in the channel botom if the width remains constant.
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