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A maximum of 10 smokers are anticipated in a smong room and each is expected to contribute about 150
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- An auditorium scats 1,500 persons. The inside design condition is 26°C dry bulb and 17°C we bulb temperatures. The outside dry bulb temperature is 35°C and the relative humidity is 50% The heat gain rate due to walls; roof, windows, etc. is 35 kW. The light power is 15 kW and the (CLF)L, is 0.82. Calculate the followings: (a) Mass flow rate of ventilation air required. (b) Cooling load due to ventilation air. (c) Total heating load due to occupants for evening show, assuning (CLF)oce. = 0.76. (d) Relative humidity inside the auditorium. (e) Maximum relative humidity allowed for comfort if the inside dry bulb temperature is to be maintained at 26°C. (f) Sensible heat ratio of the auditorium.arrow_forwardThe moisture removed from a material is 200 lb/hr and change of humidity ratio of air in the dryer is 105 grains/lbmd.a. Determine the fan capacity in cfm if specific volume of air entering is 38 ft3 /lb.arrow_forwardFor an exhaust valve, the mass flow rate through the valve is 1.26 kg/s. The flow coefficient is 0.65 and the cylinder pressure and temperature are 625 kPa and 820 K. Assume exhaust system pressure is 103 kPa, the specific heat ratio is 1.4 and R =287J/ kg.K. The effective area of the valve is (SI unit): Select one: O a. 3.45*10-2 O b. 0.85*10-2 O c. 2.2*10-3 O d. 1.85*10-3 O e. 1.42*10-3arrow_forward
- Compute the total wark done by a gas system following compression processes as shown below. Express your answer in KJ. 02 04 06 Vim'arrow_forwardAn ammonia compressor has a volumetric effienciy og 85%, operating condensing & evaporating temperatures of 40 C & 10 C respectively for a cooling capacity of 10 tons with compression index of 1.2, mean piston speed of 2m/s, 5% clearance & bore to stroke ratio of 0.7. Determine the ff: 1.Draw the PH diagram indicating the temperatures, enthalpies, and initial specific volume 2. Refrigerating effect in kj/kg 3. mass flow rate in kg/s 4. work of compressor in kj/kgarrow_forwardAn ammonia compressor has a volumetric effienciy og 85%, operating condensing & evaporating temperatures of 40 C & 10 C respectively for a cooling capacity of 10 tons with compression index of 1.2, mean piston speed of 2m/s, 5% clearance & bore to stroke ratio of 0.7. Determine the ff: 1. Draw the PH diagram indicating the temperatures, enthalpies, and initial specific volume 2. Refrigerating effect in kj/kg 3. mass flow rate in kg/s 4. work of compressor in kj/kg 5. power of compressor in kj/kg 6. cooling coefficient of performance 7. piston displacement in cu. meters/min 8. bore in mm 9. stroke in m 10. motor rpmarrow_forward
- Q 2- The Nusselt number for flow in a tube is given by Nu = C₁ Rea Prb where the constants, C1, a, and b are 0.023, 0.8, and 0.3, respectively. Estimate a mass-transfer coefficient for moist air flowing in a 30 cm tube with a diameter of 10 cm at the rate of 0.3 m3/s. Assume standard air, Prandtl number is 0.7 and unity Lewis number.arrow_forwardAn ammonia compressor has a volumetric effienciy og 85%, operating condensing & evaporating temperatures of 40 C & 10 C respectively for a cooling capacity of 10 tons with compression index of 1.2, mean piston speed of 2m/s, 5% clearance & bore to stroke ratio of 0.7. Determine the ff: 4. work of compressor in kj/kg 5. power of compressor in kj/kg 6. cooling coefficient of performancearrow_forwardyour A bank of 120-employees is maintained at 24°C db and 50% RH. The heat gain due to heat transfer through walls, roof, ..etc is 10 kW. The outside air temperature is 35°C and its relative humidity is 60%. Calculate the followings: (a) Ventilation air required. (b) Sensible and latent heat gains due to occupants. (CLF = 0.86) (c) Volumetric flow rate of supply air if the supply temperature is 18°C. (d) Volumetric flow rate of moisture removed. (e) Sensible heat ratio of the theater. (f) Relative humidity of the supply airarrow_forward
- Pls. Answer thank you! The moisture removed from a material is 200 lb/hr and change of humidity ratio in dryer is 0.015. Determine the fan capacity if specific volume of air entering is 38 ft3/lb.arrow_forwardIt is desired to rehydrate 10 kg of dried mangoes (3% dry basis) to a moisture content of 80% wet basis. How much water must be added and what is the weight of the rehydrated mangoes? (Write "done" in the answer box when done solving") A pump with a shaft input of 45 KW and efficiency of 70% is connected in a waterline carrying 0.10 m3/s and delivers it to the washing plant of a certain canning industry. The pump has 120 mm diameter suction line and a 150 mm diameter discharge pipe. The pressure gage attached to the suction line is located at 200 cm below the centerline of the discharge pressure gage and reads –500 mmHg. The pressure gage attached to the discharged pipe is located 140 cm above the centerline of the pump. Neglecting friction, calculate the discharge pressure in kPa. Mango juice puree with a specific gravity of 1.48 and viscosity of 26.7 cP is flowing in a 35 mm diameter pipe. If the puree flow rate is 1000 L/min, determine the pressure drop due to friction for a 100…arrow_forward8. The foilowing observations were made during the trial of a boiler plant consisting of a battery of 6 lancashire boilers and an economiser: Calorific value of coal per kg= 30MJ/kg; Mass of feed water per kg of dry coal 9.1 kg; Equivalent evaporation from and at 100" C per kg of dry coal = 9.6 kg; Temperature of feed water to economiser 12" C: Temperature of feed water to boiler 105° C; Air temperature 13° C ; Temperature of flue gases entering economiser 370° C; Mass of flue gases entering economiser 18.2 kgkg of coal; Mean specific heat of flue gases = 1.005 kJ/kg K. %3D Find : 1. the cfficiency of the boiler alone; 2. the efficiency of the economiser alone ; and 3. the [Ans. 72.22% ; 54.43%; 84.1%l efficiency of the whole boiler plant.arrow_forward
- Principles of Heat Transfer (Activate Learning wi...Mechanical EngineeringISBN:9781305387102Author:Kreith, Frank; Manglik, Raj M.Publisher:Cengage Learning