Heat pump driven by electric motor maintains the interior

Assignment Help Mechanical Engineering
Reference no: EM13714052

At steady state, a heat pump driven by an electric motor maintains the interior of a building at Th=293 K. The rate of heat transfer, in kJ/h, from the building through its walls and roof is given by 8000 (Th-Tc), where Tc is the outdoor temperature. Plot the minimum theoretical electric power, in kW, required to drive the heat pump versus Tc ranging from 273 K to 293 K.

Reference no: EM13714052

Questions Cloud

Determine ratio of dimensional drag force on small mario : NES/Famicom Super Mario Brothers scaling. Small Mario (figure a) has a height hM = 1.5 m, and while he is underwater runs along the ground with a speed VM = 0.5 m/s. Super Mario (figure b) is twice the height of Small Mario. How fast must Super Mario..
An important fluid property is the kinematic viscosity : An important fluid property is the kinematic viscosity which determines the viscous, or frictional, forces acting in a flow. The kinematic viscosity of air multiplied by 10^6 is given at 350, 450, 500, 550, and 650 K as 20.92,32.39, 38.79, 45.57, and..
An air compressor is designed to compress ambient : An air compressor is designed to compress ambient (assumed to be 100 kPa, 20C) to a pressure 1 MPa. The heat transfer rate to the ambient is anticipated to be equal to 10% of the power input to the compressor.
Energy is rejected by heat transfer to the cold reservoir : A power cycle operates between hot and cold reservoirs at 500 K and 310 K. At steady state the cycle develops a power output if 0.1 MW. Determine the minimum theoretical rate at which energy is rejected by heat transfer to the cold reservoir in MW
Heat pump driven by electric motor maintains the interior : At steady state, a heat pump driven by an electric motor maintains the interior of a building at Th=293 K. The rate of heat transfer, in kJ/h, from the building through its walls and roof is given by 8000 (Th-Tc), where Tc is the outdoor temperature...
Determine the total power output of the turbine : Super-heated water steam at 6 MPa and 400C enters a turbine with a velocity 50 m/s. It leaves the turbine at 70 kPa and 90% quality with a velocity of 200 m/s. The mass flow rate of steam is 20 kg/s. The rate of heat loss from turbine to surroundings..
Velocity profile of motor-oil flow in a circular pipe : To study the velocity profile of motor-oil flow in a circular pipe, it was proposed to conduct a test using water (instead of oil). The oil-conducting pipe diameter is 0.4 m and the expected average velocity is about 1.5 m/s. For the properties of th..
Vessel is divided into two compartments connected a valve : An insulated vessel is divided into two compartments connected by a valve. Initially, one compartment contains steam at 10 bar and 500ºC and the other is evacuated. The vale is opened and the steam is allowed to fill the entire volume, achieving a fi..
Determine the least area of a cross section of an ASTM : Determine the least area of a cross section of an ASTM-a36 steel bar required to support a tensile load of 100,000 lbs. the allowable unit stress is 36,000 psi. (Ans. nearest 100th of an inch squared)

Reviews

Write a Review

Mechanical Engineering Questions & Answers

  At what point on the plate does the flow become

consider flow of water over a flat plate of length 5 m. on one graph plot the both the drag caused by shear stress and

  Estimate the number of pounds of mercury

Estimate the number of pounds of mercury it would take to fill your bathtub. List all assumptions and calculations also determine the same, using glycerin.

  What is the section lift coefficient

Consider a NACA 0009 airfoil that has a plain flap whose length is 0.2c and which is deflected 25. a. Calculate cl and cmc/4 When the geometric angle of attack is 4 degrees, what is the section lift coefficient? Where is the center of pressure?

  Air enters the compressor of a regenerative gas-turbine

air enters the compressor of a regenerative gas-turbine engine at 300k and 100 kpa where it is compressed to 800 kpa

  Determine a the enthalpy of r-134a at the exit b the

r-134a is throttled from 1200kpa and 40oc to 200kpa. it is known that heat of 5kjkg is lost from r-134a to the

  The diameter of one pipe is twice the diameter of the

two pipes are connected together in series. the diameter of one pipe is twice the diameter of the second pipe. with

  Determine all of the state points and the efficiency what

in an air-standard brayton cycle air enters the compressor at 1000 lbmhr 14.7 psia and 40degf and exits at 70 psig. the

  Determine the reading of the pressure gauge

A 400 L rigid tank contains 5 kg of air at 25 degrees C. Determine the reading of the pressure gauge if the atmospheric pressure is 97 kPa.

  If the power output is 5 mw determine a the mass flow rate

steam enters an adiabatic turbine at pressure 6 mpa temperature 600oc and velocity 80 ms and leaves at pressure 50

  A car travels along a road which for a short distance is

a car travels along a road which for a short distance is defined by r200theta ft where theta is in radians. if it

  Air at 5 bar and 177c state 1 is expanded through a turbine

air at 5 bar and 177oc state 1 is expanded through a turbine to 1 bar and 27oc state2. the mass flow rate of air

  Assume adiabatic operation what is the ratio of chilled air

a device with no moving parts provides a steady stream of chilled air at -25c and 1 bar. the feed to the device is

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd