A new air conditioner using R-410a is used in heat pump mode. The high pressure is 2000
Question:
A new air conditioner using R-410a is used in heat pump mode. The high pressure is 2000 kPa and the low pressure is 400 kPa. It warms a house at 20◦C, driven by an electric power input of 2 kW in an ambient at −5◦C. Find the COP, the heating rate, and the rate of entropy generation for the heat pump.
Step by Step Answer:
To find the COP heating rate and rate of entropy generation for the heat pump we need to know the ma...View the full answer
Fundamentals Of Thermodynamics
ISBN: 9781118131992
8th Edition
Authors: Claus Borgnakke, Richard E. Sonntag
Related Video
An air pump is a device used to inflate or deflate objects by moving air in or out of them. There are many different types of air pumps, ranging from manual hand pumps to electrically powered pumps, and they are used for a variety of purposes. John had trouble blowing up many balloons without a balloon pump and experienced pain. He solved this problem by using an empty plastic bottle with a rectangular-shaped hole in the cap, a cut piece of balloon stretched over it, and a small hole in the bottle. By pressing and releasing the bottle, he created an air pump to inflate the balloons without any discomfort. Air pumps utilize fluid mechanics and thermodynamics principles to increase air pressure inside an object being inflated, such as a bicycle tire. The ideal gas law is used to calculate the pressure inside the tire. As air pressure increases, the object becomes more rigid and can support more weight. The efficiency of the pump is determined by how much of the work done is converted into useful work, such as inflating the tire, and how much is lost as heat. Understanding these principles is important to effectively use and optimize the use of air pumps.
Students also viewed these Sciences questions
-
A 1200-kg elevator driven by an electric motor can safely carry a maximum load of 800 kg. What is the power provided by the motor when the elevator ascends with a full load at a speed of 2.3 m/s?
-
A crane driven by an electric motor lifts 5 ton of building material in one minute to a height of 50m. The motor has an efficiency of 92% and the crane has an efficiency of 96%. Sketch the block...
-
A crane driven by an electric motor lifts 5 ton of building material in one minute to a height of 50m. The motor has an efficiency of 92% and the crane has an efficiency of 96%. Sketch the block...
-
When my niece Michelle told me she had learned to read, she was bursting with pride. How might reflecting on this accomplishment affect how Michelle thinks about herself?
-
An AS/RS with four aisles is 80 m long and 18 m high. The S/R machine has a maximum speed of 1.6 m/s in the horizontal direction. It accelerates from zero to 1.6 m/s in a distance of 2.0 m. On...
-
Do you perceive yourself as a transformational or transactional leader? Explain your answer.
-
Which biome includes more living things than all other biomes combined?
-
What organization has the authority to ban the sale of scooters based on safety concerns? Leota Sage saw a local motorcycle dealers newspaper advertisement for a MetroRider EZ electric scooter for...
-
Find the total derivative, dz/dt, for below function: Z= f(x,t) = (x + t)(x - 2t) where x = h(t)=2-7t
-
Northwest Hospital is a full-service hospital that provides everything from major surgery and emergency room care to outpatient clinics. The hospitals Radiology Department is considering replacing an...
-
A heat pump for heat upgrade uses ammonia with a low temperature of 25C and a high pressure of 5000 kPa. If it receives 1 MW of shaft work, what is the rate of heat transfer at the high temperature?
-
A refrigerator receives 500Wof electrical power to the compressor driving the cycle flow of R-134a. The refrigerator operates with a condensing temperature of 40C and a low temperature of 5C. Find...
-
Woodchuck Manufacturing produces quality tools for woodworking. Woodchuck has been forced to increase prices by about 40 per cent over the last few years, mostly because of the increased costs of...
-
20. Eight trucks are in the parking lot, but only 4 can be driven at any one time. How many samples of 4 trucks can be chosen from the population if: a. The order is important? b. If order is not...
-
The real rates are 1.5% per year every year. The expected inflation rate is 7% in the first year, 5% in the second year, and 4% in the third year. A Treasury bond with a 6% coupon pays coupon...
-
Show impact of accounting equation for the following transactions: A=L +SE 1.Paid previously declared cash dividend 2. Issued stock dividend 3. accrued interest expense 4. sold merch on account...
-
Tommy purchases a deferred interest rate swap with a term of five years. Under the swap, there is no swapping of interest rates during the first two years. During the last three years, the settlement...
-
An apartment building was recently sold for $3,650,000. The County Assessor has determined that the building's value is allocated with 36% land value. What is the annual allowable tax shelter from...
-
How would you expect the components of return on investment to be different for a mostly Internet-based retailer compared to a more traditional bricks-and-mortar retailer (e.g., Amazon.com versus...
-
What impact has the Internet had on the globalization of small firms? How do you think small companies will use the Internet for business in the future?
-
A refrigerator is operated by a 0.25-hp (1 hp = 746 watts) motor. If the interior is to be maintained at 4.50C and the room temperature is 38C, what is the maximum heat leak (in watts) that can be...
-
Predict the major product obtained upon radical bromination of each of the following compounds: (a) (b) (c)
-
From the following data, calculate ÎH o R,391.4 K for the reaction CH 3 COOH(g) + 2O 2 (g) 2H 2 O(g) + 2CO 2 (g): Values for ÎH o R for the first two reactions are at 298.15 K, and for...
-
Research Report Template Complete the table for dietary and nutritional guidelines for the following groups. You will need to conduct research on the internet as well as various publications. You...
-
Can you elucidate the significance of employing principled negotiation strategies in navigating multifaceted disputes?
-
A charge, Q = 4.0 x 109 C experiences a net electrostatic force of 1.2 x 106 N toward the north. a. Find the electric field (magnitude and direction) at the location of QA. b. If the charge QA is...
Study smarter with the SolutionInn App