Assume a slab of PMMA (0.12-m2) is burning with an average mass loss flux of 25 g.m-2.s-1. Comple...
Assume a slab of PMMA (0.12-m2) is burning with an average mass loss flux of 25 g.m-2.s-1. Complete heat of combustion of PMMA is 25-kJ.g-1, and assume a combustion efficiency of 65%. Calculate the heat release rate resulted from burning of this slab.
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Assume a slab of PMMA (0.12-m2) is burning with an average mass loss flux of 25 g.m-2.s-1. Comple...
External problem 1 - Chapter 8: Engine heat transfer correlation The following table reports experimental results obtained for an engine overall Nusselt number for different engine speeds. N (rp...
External problem 1 - Chapter 8: Engine heat transfer correlation The following table reports experimental results obtained for an engine overall Nusselt number for different engine speeds. N (rpm) 1000 Nu/1000 186 5000 4000 3000 2000 752 653 548 319438 The engine tested is a single cylinder engine with a 0.12 m bore and 0.12 m stroke. Assume k0.06W Im.K and 20x10 Ns/m2. The volumetric efficiency is e, 0.85 b) Write In( Nu) in function of InN), Conclude the heat...
2. The electric vehicle Tesla Model S has a drag coefficient of 0.24, a mass of 2100 kg, and a frontal area of 2.4 m2....
2. The electric vehicle Tesla Model S has a drag coefficient of 0.24, a mass of 2100 kg, and a frontal area of 2.4 m2. The coefficient of rolling resistance of its tires is 0.01. Recall the density of air at sea level is 1.3 kg/m3. How much kinetic energy is required to overcome rolling resistance and air resistance (drag) at Autobahn speeds of 180 km/hr for a 200 km trip? How much useful energy (in MJ) and money (in...
Question 2 of 4 < > - / 25 View Policies Current Attempt in Progress Air...
Question 2 of 4 < > - / 25 View Policies Current Attempt in Progress Air at atmospheric pressure and a temperature of 25°C is in parallel flow at a velocity of 5 m/s over a 1-m-long flat plate that is heated from below with a uniform heat flux of 1250 W/m2. Assume the flow is fully turbulent over the length of the plate. Evaluate properties at 325 K. (a) Calculate the plate surface temperature, Ts(x). in °C, and the...
1. Define heat release rate (HRR) and explain its importance, in your own words. Specifically, what...
1. Define heat release rate (HRR) and explain its importance, in your own words. Specifically, what clements affect the HRR of a single fuel package? What is the mathematical formula for determining the HRR, and what does each element of the equation represent? Write your answers in your own words. Provide all references. Determine the peak HRR of the following items in Review Questions 2-5 (provide refer- ences for your answers): 2. Bunk bed 3. Sofa 4. Mattress 5. Kiosk...
2. (10 points) A pharmaceutical fluid is sterilized by heating it from 25 to 75 °C...
2. (10 points) A pharmaceutical fluid is sterilized by heating it from 25 to 75 °C as it moves at 0.2 m/s through a straight thin-walled stainless steel tube of 12.7-mm diameter that is 10 m long. A uniform heat flux is maintained by an electric resistance heater wrapped around the outer surface of the straight tube. The pharmaceutical fluid properties may be approximated as: p = 1000 kg/mº, cp = 4 kJ/kg-K, u = 2.102 kg/s-m, k = 1...
1. Calculate the primary NAAQS concentration limit for 502 in units of ug/m' at standard temperature...
1. Calculate the primary NAAQS concentration limit for 502 in units of ug/m' at standard temperature and pressure (STP:T - 25*C, P = 1 atm). 2. Fuel X9-6000 is 95.8% efficient in an airplane engine. The unburned fuel leaves as VOCS in the exhaust. For each kg of fuel X9-6000 (Molecular Weight, MW-98), the engine exhausts 20 kg of gases (MW = 28 g/mol). What is the fraction of VOCs in the exhaust (ppm)? ncinerator burns 30 tonnes of plastic...
25 PRR HEAT TRANSFER NAME: UNIT SIX AND SEVEN EXCHANGERS BOILING AND CONDENSATION, He- Solve the following problems:...
25 PRR HEAT TRANSFER NAME: UNIT SIX AND SEVEN EXCHANGERS BOILING AND CONDENSATION, He- Solve the following problems: 1. In a gas-faired boiler, water is boiler at 150 C by hot gases flowing through 59 m long, 5 cm outer diameter mechanically polished stailess-stell pipes submerged in water, If the outer surface temperature of the pipes is 180 °C. determine (a) the rate of heat transfer from the hot gases to water. (b) the rate of evaporation, (c) the ratio...
T =1050 K P.950 kPa m-5k/s Q=12 kW Question 1 150 Points) Combustion gases that we...
T =1050 K P.950 kPa m-5k/s Q=12 kW Question 1 150 Points) Combustion gases that we can assume to be air enter a gas turbine at T-1050 K and P-950 kPa at a mass flow rate of 5 kg/s and leave the turbine at T 850 K and P-500 kPa. The heat lost to the surroundings at 25 °C is 12 kW. The flow through the turbine is steady state steady flow process. The air can be assumed to be...
Question 1 Moist air, saturated at 5°C, enters a heating coil at a rate of 10 m2/s. Air leaves th...
Question 1 Moist air, saturated at 5°C, enters a heating coil at a rate of 10 m2/s. Air leaves the coil at 40°C. a) What is the nature of this transformation? Find from the psychrometric chart the required rate of heat addition. n r Tables Vertical wall in wi Horizontal wall in contact with the ground (Hoor of a heated space, buried) all adjoining to an unheated room (garage, sh Wall in contact with the outside Space category contact with...
#2 Problem 1: (A) Hot water at a rate of 0.2 Liter/s passing through a gas...
#2
Problem 1: (A) Hot water at a rate of 0.2 Liter/s passing through a gas wall-mount heater placed upstream in the basement and heats the water from 5°C to a 60°C for a shower. Taking the density o water to be 1 kg/L, determine the total heat added in the heater. (25 points) -5℃ T イ1.60℃ water is in subcooled in the streami -ue.oon KJ/S is volume flow rate (m'/s) & is mass flow rate (kg/s) v2 for each...
External problem 1 - Chapter 8: Engine heat transfer correlation The following table reports experimental results obtained for an engine overall Nusselt number for different engine speeds. N (rpm) 1000 Nu/1000 186 5000 4000 3000 2000 752 653 548 319438 The engine tested is a single cylinder engine with a 0.12 m bore and 0.12 m stroke. Assume k0.06W Im.K and 20x10 Ns/m2. The volumetric efficiency is e, 0.85 b) Write In( Nu) in function of InN), Conclude the heat...
2. The electric vehicle Tesla Model S has a drag coefficient of 0.24, a mass of 2100 kg, and a frontal area of 2.4 m2. The coefficient of rolling resistance of its tires is 0.01. Recall the density of air at sea level is 1.3 kg/m3. How much kinetic energy is required to overcome rolling resistance and air resistance (drag) at Autobahn speeds of 180 km/hr for a 200 km trip? How much useful energy (in MJ) and money (in...
Question 2 of 4 < > - / 25 View Policies Current Attempt in Progress Air at atmospheric pressure and a temperature of 25°C is in parallel flow at a velocity of 5 m/s over a 1-m-long flat plate that is heated from below with a uniform heat flux of 1250 W/m2. Assume the flow is fully turbulent over the length of the plate. Evaluate properties at 325 K. (a) Calculate the plate surface temperature, Ts(x). in °C, and the...
1. Define heat release rate (HRR) and explain its importance, in your own words. Specifically, what clements affect the HRR of a single fuel package? What is the mathematical formula for determining the HRR, and what does each element of the equation represent? Write your answers in your own words. Provide all references. Determine the peak HRR of the following items in Review Questions 2-5 (provide refer- ences for your answers): 2. Bunk bed 3. Sofa 4. Mattress 5. Kiosk...
2. (10 points) A pharmaceutical fluid is sterilized by heating it from 25 to 75 °C as it moves at 0.2 m/s through a straight thin-walled stainless steel tube of 12.7-mm diameter that is 10 m long. A uniform heat flux is maintained by an electric resistance heater wrapped around the outer surface of the straight tube. The pharmaceutical fluid properties may be approximated as: p = 1000 kg/mº, cp = 4 kJ/kg-K, u = 2.102 kg/s-m, k = 1...
1. Calculate the primary NAAQS concentration limit for 502 in units of ug/m' at standard temperature and pressure (STP:T - 25*C, P = 1 atm). 2. Fuel X9-6000 is 95.8% efficient in an airplane engine. The unburned fuel leaves as VOCS in the exhaust. For each kg of fuel X9-6000 (Molecular Weight, MW-98), the engine exhausts 20 kg of gases (MW = 28 g/mol). What is the fraction of VOCs in the exhaust (ppm)? ncinerator burns 30 tonnes of plastic...
25 PRR HEAT TRANSFER NAME: UNIT SIX AND SEVEN EXCHANGERS BOILING AND CONDENSATION, He- Solve the following problems: 1. In a gas-faired boiler, water is boiler at 150 C by hot gases flowing through 59 m long, 5 cm outer diameter mechanically polished stailess-stell pipes submerged in water, If the outer surface temperature of the pipes is 180 °C. determine (a) the rate of heat transfer from the hot gases to water. (b) the rate of evaporation, (c) the ratio...
T =1050 K P.950 kPa m-5k/s Q=12 kW Question 1 150 Points) Combustion gases that we can assume to be air enter a gas turbine at T-1050 K and P-950 kPa at a mass flow rate of 5 kg/s and leave the turbine at T 850 K and P-500 kPa. The heat lost to the surroundings at 25 °C is 12 kW. The flow through the turbine is steady state steady flow process. The air can be assumed to be...
Question 1 Moist air, saturated at 5°C, enters a heating coil at a rate of 10 m2/s. Air leaves the coil at 40°C. a) What is the nature of this transformation? Find from the psychrometric chart the required rate of heat addition. n r Tables Vertical wall in wi Horizontal wall in contact with the ground (Hoor of a heated space, buried) all adjoining to an unheated room (garage, sh Wall in contact with the outside Space category contact with...
#2
Problem 1: (A) Hot water at a rate of 0.2 Liter/s passing through a gas wall-mount heater placed upstream in the basement and heats the water from 5°C to a 60°C for a shower. Taking the density o water to be 1 kg/L, determine the total heat added in the heater. (25 points) -5℃ T イ1.60℃ water is in subcooled in the streami -ue.oon KJ/S is volume flow rate (m'/s) & is mass flow rate (kg/s) v2 for each...
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