a shower mixes 1.2 kg/s of cool water at 20c with 0.9 kg/s of hot water...
a shower mixes 1.2 kg/s of cool water at 20c with 0.9 kg/s of hot water at 65C .during mixing heat is lost to the surrounding at the rate of 28 kj/s. what is the temperature of the warm water stream?
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a shower mixes 1.2 kg/s of cool water at 20c with 0.9 kg/s of
hot water...
#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...
A hot-water stream at 80°C enters a mixing chamber with a mass flow rate of 0.56...
A hot-water stream at 80°C enters a mixing chamber with a mass flow rate of 0.56 kg/s where it is mixed with a stream of cold water at 20°C. If it is desired that the mixture leave the chamber at 42°C, determine the mass flow rate of the cold-water stream. Assume all the streams are at a pressure of 250 kPa. The enthalpies are 335.02 kJ/kg, 83.915 kJ/kg, and 175.90 kJ/kg. The saturation temperature at a pressure of 250 kPa...
To cool her 0.200 kg cup of 75.0 C hot chocolate (mostly water), Heidi drops a...
To cool her 0.200 kg cup of 75.0 C hot chocolate (mostly water), Heidi drops a 29,.97 g ice cube at 0 C into her insulated cup. After the ice cube melts, the temperature of the hot chocolate comes down to 54.8 C. a. How much energy was lost by the hot chocolate? The specific heat capacity of water is 1 cal/g C b. How much energy was gained by the ice cube just to melt to 0 C water?...
Hot water flows thorough a parallel flow heat exchanger at a rate of 10 kg/min and...
Hot water flows thorough a parallel flow heat exchanger at a rate of 10 kg/min and is cooled by a cold water stream of flow rate 25 kg/min. The inlet temperatures of hot and cold water streams are 70 oC and 25 oC, respectively. The outlet temperature of the hot water is expected to be 50 oC. The individual convective heat transfer coefficient on both sides of the heat transfer area is 600 W/m2 .K. Take the specific heat for...
A heat exchanger is used to heat cold water at 8C entering at a rate of...
A heat exchanger is used to heat cold water at 8C entering at a rate of 1.2 kg/s by hot air at 90 C entering at rate of 2.5 kg/s. The heat exchanger is not insulated, and is loosing heat at a rate of 28 kJ/s. If the exit temperature of hot air is 20 C, the exit temperature of cold water is
2. A SCEN101 student mixes 148.3 grams of hot water at 54.3°C with 143.2 grams of...
2. A SCEN101 student mixes 148.3 grams of hot water at 54.3°C with 143.2 grams of cold water at 20.2°C. What is the final temperature in °C of the mixture assuming no heat is lost to the environment as the mixture gets equilibrium? (3 points) 3. Is it possible to add heat to an object, and the objects temperature stays the same? Give reason for your answer. (1 point) How many calories heat is required to change 1.5 grams of...
3.2.3 The device shown mixes saturated steam and cold water and produces warm water. The cold...
3.2.3 The device shown mixes saturated steam and cold water and produces warm water. The cold water flows in at 12 kg/s at 50°C. The steam flows in at 0.2 kg/s at 160 C. The resulting water flows out at 60°C. The pressure for all three is a constant 100 kPa. If the pipe out has a 0.03 m diameter, what is the mass flow rate and velocity of the water coming out. Cool feedwater Warm feedaner Ans: 12.2 kg/s,...
Cold water (Cp = 4180 J/kg · °C) leading to a shower enters a thin-walled double-pipe...
Cold water (Cp = 4180 J/kg · °C) leading to a shower enters a thin-walled double-pipe counter-flow heat exchanger at 15°C at a rate of 0.25 kg/s and is heated to 45°C by hot water (Cp = 4190 J/kg · °C) that enters at 100°C at a rate of 3 kg/s. If the overall heat transfer coefficient is 950 W/m2 · °C. determine the rate of heat transfer and the heat transfer surface area of the heat exchanger using the...
The temperature of 2.7 kg of water is 34° C. To cool the water, ice at...
The temperature of 2.7 kg of water is 34° C. To cool the water, ice at 0° C is added to it. The desired final temperature of the water is 11° C. The latent heat of fusion for water is 333.5 × 103 J/kg, and the specific heat capacity of water is 4186 J/(kg·C°). Ignoring the container and any heat lost or gained to or from the surroundings, determine how much mass m of ice should be added. m = kg
The temperature of 2.26 kg of water is 34 °C. To cool the water, ice at...
The temperature of 2.26 kg of water is 34 °C. To cool the water, ice at 0 °C is added to it. The desired final temperature of the water is 11 °C. The latent heat of fusion for water is 33.5 × 104 J/kg, and the specific heat capacity of water is 4186 J/(kg·C°). Ignoring the container and any heat lost or gained to or from the surroundings, determine how much mass m of ice should be added.
#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...
2. A SCEN101 student mixes 148.3 grams of hot water at 54.3°C with 143.2 grams of cold water at 20.2°C. What is the final temperature in °C of the mixture assuming no heat is lost to the environment as the mixture gets equilibrium? (3 points) 3. Is it possible to add heat to an object, and the objects temperature stays the same? Give reason for your answer. (1 point) How many calories heat is required to change 1.5 grams of...
3.2.3 The device shown mixes saturated steam and cold water and produces warm water. The cold water flows in at 12 kg/s at 50°C. The steam flows in at 0.2 kg/s at 160 C. The resulting water flows out at 60°C. The pressure for all three is a constant 100 kPa. If the pipe out has a 0.03 m diameter, what is the mass flow rate and velocity of the water coming out. Cool feedwater Warm feedaner Ans: 12.2 kg/s,...
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