Find the power required to run the heat pump

Assignment Help Civil Engineering
Reference no: EM131249840

A dairy farmer needs to heat a 0.1-kg/s flow of milk from room temperature, 20?C, to 60?C in order to pasteurize it and then send the flow through a cooler, bringing it to 10?C for storage. He wants to buy a heat pump to do this and finds one using R-134a with a high pressure of 3 MPa and a low pressure of 300 kPa. The farmer is very clever and uses the heat pump to heat the milk in a heat exchanger, after which the milk flows through the evaporator's heat exchanger to cool it. Find the power required to run the heat pump so that it can do both the heating and the cooling, assuming milk has the properties of water. Is there any excess heating or cooling capacity? What is the total rate of exergy destruction attained by running this system?

Reference no: EM131249840

Questions Cloud

What is the thermal efficiency of this power plant : Consider the ammonia Rankine-cycle power plant shown in Fig. P9.31. The plant was designed to operate in a location where the ocean water temperature is 25?C near the surface and 5?C at some greater depth. The mass flow rate of the working fluid i..
Identify the name of the venue and the date you attended : Explain and identify how/why the artistic event fits in the broader cultural/artistic environment, either in Fort Wayne specifically or in that of America or even other parts of the world.
Determine whether the system admits a limit cycle in r2 : When δ > 0, Bendixson's criterion rules out the existence of a periodic solution in R2. Assume now δ = 0, and determine whether the system admits a limit cycle in R2.
Preventing fraud and abuse in managed care : Your paper should be 7-10 pages in length, with 12-point font, and double-spaced. Include a cover page, table of contents, introduction, body of the report, summary/conclusion, and works cited.
Find the power required to run the heat pump : Find the power required to run the heat pump so that it can do both the heating and the cooling, assuming milk has the properties of water. Is there any excess heating or cooling capacity? What is the total rate of exergy destruction attained by r..
Excerpt from a book or internet page : Explain your findings. Based on the readability tests you conducted, assess whether you consider the excerpt contains language which would be suitable for a business document and enhances readability. The excerpt should be supplied by mail/fax or ..
What goal is the organization trying to accomplish : Describe the strategies or actions involved in the training exercise to meet established goals. What is the expected performance or applications after the training? How will the strategies drive successful business results and improve employee per..
Guarantee the success of a business : While there is no blueprint or checklist that one can follow to guarantee the success of a business, much can be learned from analyzing those that have failed and those that have flourished during the same time period and under similar circumstanc..
Find the thermal efficiency of the cycle : The remainder of the steam is reheated to 400?C at this pressure, 0.8 MPa, and is fed to the low-pressure turbine. The condenser pressure is 10 kPa. Calculate the thermal efficiency of the cycle and the network per kilogram of steam.

Reviews

Write a Review

Civil Engineering Questions & Answers

  Calculate the overconsolidation ratio of the clay layer

From the results of an oedometer test on an undisturbed sample of clay taken at a depth of 10 m from the ground surface, the maximum vertical preconsolidation pressure (s'vmax or s'c) was found to be 560 kPa.

  What lift area would be required per year

The current landfill site covers 50 acres, including 5 acres needed for access roads and auxiliary facilities, and has completed one lift on the site of solid waste. If two more lifts are envisioned before closure, how long would it take to complete ..

  Evaluate damage of material and compressive strength

A structural element subjected to cyclic loading is made of fc' = 3000 psi concrete. Compressive stresses are changing between 2200 psi and 1600 psi. The frequency of loading is 8 Hz.

  Determine sketch beam and show neutral axis

A rectangular beam 4 inches wide and 12 inches height must sustain a maximum bending stress of 12,500 Lbs/in^2. A) Sketch beam and show neutral axis. B) Solve for the maximum bending moment.

  Determine at what rate must generated power be sold in order

The motor-generators installed with these pump-turbines have an efficiency of 0.85 when operating as motors and 0.91 when operating as generators. Each pump-turbine uses its own 100-m-long, 150-cm steel penstock.

  On a summer day when the wind speed in 3 ms a tank truck

on a summer day when the wind speed in 3 ms a tank truck loaded with liquid chlorine is involved in an accident that

  Calculate horizontal length ab

Similar to Problem 27.19, except the air base is 6940 ft, the flying height above mean sea level is 12,520 ft, the x and y photo coordinates on the left photo are xa = 37.98 mm, ya = 50.45 mm, xb = 24.60 mm, and yb = -46.89 mm, and the x photo coo..

  Determine the surface area of a 1m depth lagoon

A well mixed sewage lagoon is to be constructed to process 100,000 gallons per day of raw sewage. The pollutant concentration in the raw sewage to be discharged into the lagoon is 200ppm.

  Determine what will be the height above datum of a point b

If the free surface at a distance from the axis of the vortex, which is sufficient for its effect to be negligible, is 180 mm above datum, what will be the height above datum of a point B on the free surface at a radius of 100 mm

  Determine the initial speed v0 and angle-theta required

The receiver's velocity is constant at 10 yd/sec, and he catches passes when the ball is 6 ft. above the ground. If the quarterback desires the receiver to catch the ball 2.5 sec. after the launch instant, determine the initial speed v0 and angle,..

  Calculate total organic load reaching the plant per day and

Calculate total organic load reaching the plant per day and the population equivalent based on BOD5 of the combined wastewater flow for ultimate development condition (ie. end of the design period).

  What is the water content of this borrow material

A soil borrow material in its natural state in the ground has a unit weight of 85 pfc. When a sample of this soil is dried in the laboratory, its dry unit weight is 72 pfc.

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