Homework Answers
Add Answer to:
Problem 4.049 A pump is used to circulate hot water in a home heating system. Water...
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...
2. Internal Viscous Flow a) Pumps are used to circulate hot water through a home heating...
2. Internal Viscous Flow a) Pumps are used to circulate hot water through a home heating system. Summarize, in your own words, all the forces the pump must overcome to maintain a constant flow rate. Use the vector form of the Navier-Stokes equation to prove your answer. b) Apply the solution methods you learned to solve the following engineering problem: Water flows steadily through a smooth, circular, horizontal pipe. The discharge rate is 0.04 m/s and the pipe diameter is...
9-1 The above office requires 2,000,000 BTUH heating for exterior zones. A hot water heating system with a circulating pump is used for water circulation. Assume Heating coils have inlet temp 180 F o...
9-1 The above office requires 2,000,000 BTUH heating for exterior zones. A hot water heating system with a circulating pump is used for water circulation. Assume Heating coils have inlet temp 180 F outlet temp 140", and pump head is 30 FT. Answer the following questions: (3 points) (a) The required total hot water flow rate in GPM (b) BHP if the pump selected has an efficiency of 50% (c) what is the water main pipe size
9-1 The above...
6. (3 points) A water-based heating system is shown in Figure 5. A pump exerts a...
6. (3 points) A water-based heating system is shown in Figure 5. A pump exerts a constant pressure difference between its inlet and outlet, ΔΡ-12 psi, to circulate hot water across 2 distinct paths. One path contains a single radiator that can be modelled as a pipe with an effective resistance to water flow of Ri-4x 107 kg-m-4 . s-1. The other path has two radiators with effective resistances to water flow given by R2-5x 107kg. m-4-S-1 and R3 3...
Problem 8.015 Water is the working fluid in a Rankine cycle. Steam exits the steam generator at 1500 lbf/in.2 and 1100℉ Due to heat transfer and frictional effects in the line connecting the steam ge...
Problem 8.015 Water is the working fluid in a Rankine cycle. Steam exits the steam generator at 1500 lbf/in.2 and 1100℉ Due to heat transfer and frictional effects in the line connecting the steam generator and turbine, the pressure and temperature at the turbine inlet are reduced to 1400 Ibf/in.2 and 1000 , respectively. Both the turbine and pump have isentropic efficiencies of 95%. Pressure at the condenser inlet is 2 lbf/ in.2, but due to frictional effects the condensate...
Problem 5: The 28-in-diameter pump in the Figure at 1170 r/min is used to pump water at 20°C through a piping system at 14,000 gal/min. (a) Determine the required brake horsepower. The average fricti...
Problem 5: The 28-in-diameter pump in the Figure at 1170 r/min is used to pump water at 20°C through a piping system at 14,000 gal/min. (a) Determine the required brake horsepower. The average friction factor is 0.018. (b) If there is 65 ft of 12-in-diameter pipe upstream of the pump, how far below the surface should the pump inlet be placed to avoid cavitation? Given that the water at 20 °C has a specific weight of 62.4 lbf/ft and vapor...
3_12: A pump operating at steady state draws in 60 kg of liquid water per second...
3_12: A pump operating at steady state draws in 60 kg of liquid water per second at 1 bar, 15 °C and delivers the water to a location whose elevation is 10 m above that of the inlet. The exit pressure is 4 bar and the temperature remains constant. The inlet has a diameter of 20 cm and the exit has a diameter of 10 cm. The pump operates adiabatic and experiences no internal irreversibility. If pumps are sold in...
THERMO Question 1 A pump steadily delivers 13.7 kg/s of water at the conditions given below....
THERMO Question 1 A pump steadily delivers 13.7 kg/s of water at the conditions given below. Calculate the pump power (hp). There is no heat transfer from the pump to the surroundings (i.e., adiabatic conditions). Pump Inlet Temperature = 20oC Pump Inlet Pressure = 170 kPa Pump Inlet Diameter = 11.4 cm Pump Inlet Elevation = 20 m Pump Exit Temperature = 20oC Pump Exit Pressure = 581 kPa Pump Exit Diameter = 5 cm Pump Exit Elevation = 20...
A two-pipe direct return chilled water system with an expansion tank is used to circulate water...
A two-pipe direct return chilled water system with an expansion tank is used to circulate water for cooling three identical loads in a commercial building. Each load is connected with a balancing valve, zone valve and thermostat. Given that the cooling capacity of each load is 50 kW, density of water 1000kg/m3, a specific heat of water Cpw 4.185 kJ/kg K and gravitational constant 10 m/s2. (a) Sketch a schematic of the system illustrating all the components. (6%) Legend Expansion...
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...
2. Internal Viscous Flow a) Pumps are used to circulate hot water through a home heating system. Summarize, in your own words, all the forces the pump must overcome to maintain a constant flow rate. Use the vector form of the Navier-Stokes equation to prove your answer. b) Apply the solution methods you learned to solve the following engineering problem: Water flows steadily through a smooth, circular, horizontal pipe. The discharge rate is 0.04 m/s and the pipe diameter is...
9-1 The above office requires 2,000,000 BTUH heating for exterior zones. A hot water heating system with a circulating pump is used for water circulation. Assume Heating coils have inlet temp 180 F outlet temp 140", and pump head is 30 FT. Answer the following questions: (3 points) (a) The required total hot water flow rate in GPM (b) BHP if the pump selected has an efficiency of 50% (c) what is the water main pipe size
9-1 The above...
6. (3 points) A water-based heating system is shown in Figure 5. A pump exerts a constant pressure difference between its inlet and outlet, ΔΡ-12 psi, to circulate hot water across 2 distinct paths. One path contains a single radiator that can be modelled as a pipe with an effective resistance to water flow of Ri-4x 107 kg-m-4 . s-1. The other path has two radiators with effective resistances to water flow given by R2-5x 107kg. m-4-S-1 and R3 3...
Problem 8.015 Water is the working fluid in a Rankine cycle. Steam exits the steam generator at 1500 lbf/in.2 and 1100℉ Due to heat transfer and frictional effects in the line connecting the steam generator and turbine, the pressure and temperature at the turbine inlet are reduced to 1400 Ibf/in.2 and 1000 , respectively. Both the turbine and pump have isentropic efficiencies of 95%. Pressure at the condenser inlet is 2 lbf/ in.2, but due to frictional effects the condensate...
Problem 5: The 28-in-diameter pump in the Figure at 1170 r/min is used to pump water at 20°C through a piping system at 14,000 gal/min. (a) Determine the required brake horsepower. The average friction factor is 0.018. (b) If there is 65 ft of 12-in-diameter pipe upstream of the pump, how far below the surface should the pump inlet be placed to avoid cavitation? Given that the water at 20 °C has a specific weight of 62.4 lbf/ft and vapor...
3_12: A pump operating at steady state draws in 60 kg of liquid water per second at 1 bar, 15 °C and delivers the water to a location whose elevation is 10 m above that of the inlet. The exit pressure is 4 bar and the temperature remains constant. The inlet has a diameter of 20 cm and the exit has a diameter of 10 cm. The pump operates adiabatic and experiences no internal irreversibility. If pumps are sold in...
A two-pipe direct return chilled water system with an expansion tank is used to circulate water for cooling three identical loads in a commercial building. Each load is connected with a balancing valve, zone valve and thermostat. Given that the cooling capacity of each load is 50 kW, density of water 1000kg/m3, a specific heat of water Cpw 4.185 kJ/kg K and gravitational constant 10 m/s2. (a) Sketch a schematic of the system illustrating all the components. (6%) Legend Expansion...
Most questions answered within 3 hours.
-
Based on the range, which of the following sets of scores has
the greatest variability? 3,...
asked 50 minutes ago -
Ripples in a pond travel at a velocity of 3 m/s with one peak
passing a...
asked 40 minutes ago -
A man stands on the roof of a building of height 13.0 mm and
throws a...
asked 46 minutes ago -
The extent to which assets are financed by borrowed funds and
other liabilities is indicated by:...
asked 1 hour ago -
Explain in detail
Germany is the fifth largest economy
explain what goods and services Germany specializes...
asked 2 hours ago -
The density of platinum is 21.45 g/mL. If a cube of platinum
with a mass of...
asked 2 hours ago -
Accounts Receivable
Sales
A/R Posting
Extended Sales Invoice
Packing Slip
Compare invoice to packing slip 2...
asked 2 hours ago -
Michaella, age 23, is a full-time law student and is claimed by
her parents as a...
asked 2 hours ago -
Why are polymers not typically casted into products?
asked 2 hours ago -
When rolling a die 129 times, what is the probability of rolling
a 6 no more...
asked 2 hours ago -
4. A call option currently sells for $7.75. It has a strike
price of $85 and...
asked 2 hours ago -
1.
You need to prepare 10.0 liters of an acid aqueous solution with a
pH of...
asked 2 hours ago