A 50-gallon electric water heater is used to heat tap water with an initial temperature of...
A 50-gallon electric water heater is used to heat tap water with an initial temperature of 15oC. The heating level is set at a maximum while several people are taking their showers. If the maximum heating level of the heater is 7.5kW of electricity and the water use rate is 3 gal/min, what is the temperature of the water exiting the heater? Assume that the system is at steady state and the heater is 100% efficient; that is it is perfectly insulated and all of the energy used goes to heat the water. If 10% of the heat is lost to the surrounding what is the temperature of the exiting water?
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A 50-gallon electric water heater is used to heat tap water with
an initial temperature of...
SME 4463/SKMM 3443 Q3. (a) Water is heated from 15oC to 75°C as it flows through...
SME 4463/SKMM 3443 Q3. (a) Water is heated from 15oC to 75°C as it flows through a 2.5-cm-internal-diameter, 15-m long tube. The tube is equipped with an electric resistance heater, which provides uniform heating throughout the surface of the tube. The outer surface of the heater is well insulated, so that in steady state operation all the heat generated in the heater is transferred to the water in the tube. If the system is to provide hot water at a...
A pump is used to circulate hot water in a home heating system. Water enters the...
A pump is used to circulate hot water in a home heating system.
Water enters the well-insulated pump operating at steady state at a
rate of 0.42 gal/min. The inlet pressure and temperature are 14.7
lbf/in2, and 180F,
respectively; at the exit the pressure is 60 lbf/in2.
The pump requires 1/35 hp of power input. Water can be modeled as
an incompressible substance with constant density of 60.58
lb/ft3 and constant specific heat of 1 Btu/lb
R.
Neglecting kinetic and...
A pump is used to circulate hot water in a home heating system. Water enters the...
A pump is used to circulate hot water in a home heating system. Water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. The inlet pressure and temperature are 14.7 lbf/in.2, and 180°F, respectively; at the exit the pressure is 90 lbf/in.2 The pump requires 1/15 hp of power input. Water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 Btu/lb · °R. Neglecting kinetic...
Problem 4.049 A pump is used to circulate hot water in a home heating system. Water...
Problem 4.049 A pump is used to circulate hot water in a home heating system. Water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. The inlet pressure and temperature are 14.7 lbf/in., and 180°F, respectively; at the exit the pressure is 90 lbf/in. The pump requires 1/35 hp of power input. Water can be modeled as an incompressible substance with constant density of 60.58 lb/ft and constant specific heat of 1 Btu/lb OR Neglecting...
An engineer is developing an electric water heater to provide acontinuous ("on demand") supply of hot...
An engineer is developing an
electric water heater to provide acontinuous ("on demand") supply
of hot water. One trial design isshown in the figure. Water is
flowing at the rate F, the inlet thermometer registers
T_1, the voltmeter reads V, and the ammeter reads current I. Then
the power (i.e., the heat generated perunit time by the heating
element) is VI.
Assume that the heat capacity of water is C and that the heat
capacity of the heater apparatus is...
Please help and solve Radiation from a heater is used to heat the still and produce...
Please help and solve
Radiation from a heater is used to heat the still and produce vapor steam as shown here. The heater is maintained at 1000C. The surrounding temperature is 27C. By employing a hypothetical surface for the side surface between Al and A2 to form an enclosure, a radiative circuit can be plotted as shown. Take D= 200mm, D2 = 250mm, H = 100mm.&1 = 0.8. Water latent heat of vaporization is 2.26 x 106J/kg. vapor ED RE...
Problem I-B Circuit shown below in Fig. 1-B is used to heat water (of 5000 American gallon) illustrated. A DC volta...
Problem I-B Circuit shown below in Fig. 1-B is used to heat water (of 5000 American gallon) illustrated. A DC voltage source of 120 volts is used to energize three heating elements, each of value (3R) ohm. It is observed that the temperature of the water changes from 100° F to 200° F over a time period of 1.5 hours. Calculate as (i) Total current supplied by the de source at 100°F (Ans: 12.47 A) Resistance value (R in ohm)...
A 300 W immersion heater is used to heat 400 g of water from 10 ⁰C...
A 300 W immersion heater is used to heat 400 g of water from 10 ⁰C to 80 ⁰C. About how many minutes did this take? 5 min 3.5 min 2 min None of the above is correct As blood passes through the capillary bed in an organ, the capillaries join to form venules (small veins). If the blood speed increases by a factor of 4.00 and the total cross-sectional area of the venules is 9.5 cm2, what is the...
1. At an outdoor lot, there is a black-colored solar heat collection copper pipe. It is 50 meters...
Please answer question 2.
Quastion 1 answer is already provided in the photos.
1. At an outdoor lot, there is a black-colored solar heat collection copper pipe. It is 50 meters long, 10 cm in inner diameter and 10.2 cm in outer diameter. The pipe is set horizontally. Assume that solar radiation in 1.0 kW/m2 shines on the entire surface of the pipe and convert 90% of the solar energy on the pipe into heat. There is water in 25...
Two large parallel plates with surface conditions approximating those of a blackbody are maintained at 800°C...
Two large parallel plates with surface conditions approximating those of a blackbody are maintained at 800°C and 100°C, respectively. Determine the rate of heal transfer by radiation between the plates in Wim and the radiative heat transfer coefficient in W/m K ) 12 Write down the one-dimensional sent heal conduction equation for a plane wall with constant thermal conductivity and heat generation in its simplest form, and indicate what each variable represents 13 Write down the one-dimensional transient heat conduction...
SME 4463/SKMM 3443 Q3. (a) Water is heated from 15oC to 75°C as it flows through a 2.5-cm-internal-diameter, 15-m long tube. The tube is equipped with an electric resistance heater, which provides uniform heating throughout the surface of the tube. The outer surface of the heater is well insulated, so that in steady state operation all the heat generated in the heater is transferred to the water in the tube. If the system is to provide hot water at a...
A pump is used to circulate hot water in a home heating system.
Water enters the well-insulated pump operating at steady state at a
rate of 0.42 gal/min. The inlet pressure and temperature are 14.7
lbf/in2, and 180F,
respectively; at the exit the pressure is 60 lbf/in2.
The pump requires 1/35 hp of power input. Water can be modeled as
an incompressible substance with constant density of 60.58
lb/ft3 and constant specific heat of 1 Btu/lb
R.
Neglecting kinetic and...
Problem 4.049 A pump is used to circulate hot water in a home heating system. Water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. The inlet pressure and temperature are 14.7 lbf/in., and 180°F, respectively; at the exit the pressure is 90 lbf/in. The pump requires 1/35 hp of power input. Water can be modeled as an incompressible substance with constant density of 60.58 lb/ft and constant specific heat of 1 Btu/lb OR Neglecting...
An engineer is developing an
electric water heater to provide acontinuous ("on demand") supply
of hot water. One trial design isshown in the figure. Water is
flowing at the rate F, the inlet thermometer registers
T_1, the voltmeter reads V, and the ammeter reads current I. Then
the power (i.e., the heat generated perunit time by the heating
element) is VI.
Assume that the heat capacity of water is C and that the heat
capacity of the heater apparatus is...
Please help and solve
Radiation from a heater is used to heat the still and produce vapor steam as shown here. The heater is maintained at 1000C. The surrounding temperature is 27C. By employing a hypothetical surface for the side surface between Al and A2 to form an enclosure, a radiative circuit can be plotted as shown. Take D= 200mm, D2 = 250mm, H = 100mm.&1 = 0.8. Water latent heat of vaporization is 2.26 x 106J/kg. vapor ED RE...
Problem I-B Circuit shown below in Fig. 1-B is used to heat water (of 5000 American gallon) illustrated. A DC voltage source of 120 volts is used to energize three heating elements, each of value (3R) ohm. It is observed that the temperature of the water changes from 100° F to 200° F over a time period of 1.5 hours. Calculate as (i) Total current supplied by the de source at 100°F (Ans: 12.47 A) Resistance value (R in ohm)...
Please answer question 2.
Quastion 1 answer is already provided in the photos.
1. At an outdoor lot, there is a black-colored solar heat collection copper pipe. It is 50 meters long, 10 cm in inner diameter and 10.2 cm in outer diameter. The pipe is set horizontally. Assume that solar radiation in 1.0 kW/m2 shines on the entire surface of the pipe and convert 90% of the solar energy on the pipe into heat. There is water in 25...
Two large parallel plates with surface conditions approximating those of a blackbody are maintained at 800°C and 100°C, respectively. Determine the rate of heal transfer by radiation between the plates in Wim and the radiative heat transfer coefficient in W/m K ) 12 Write down the one-dimensional sent heal conduction equation for a plane wall with constant thermal conductivity and heat generation in its simplest form, and indicate what each variable represents 13 Write down the one-dimensional transient heat conduction...
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