FUNDAMENTALS OF THERMODYNAMICS
10th Edition
ISBN: 9781119634928
Author: Borgnakke
Publisher: WILEY
expand_more
expand_more
format_list_bulleted
Videos
Question
error_outline
This textbook solution is under construction.
Students have asked these similar questions
Q.7
The COP of the heat pump is found to be
5.62, and the heat pump operates with the
source at 25°C, while the heat absorbed
is 2.12 kW. What is the amount of heat
rejected ?
1.) A Carnot engine is coupled to a Carnot refrigerator so that all the work produced by the
engine is used by the refrigerator in extraction of heat from a heat reservoir at 270K at the rate of
4 kJ/s. The source of energy for the Carnot engine is a heat reservoir at 500K. If both devise
discard heat to the surrounding at 300K,
a. How much heat does the engine absorb from the 500K reservoir?
b. If the actual efficiency of the engine is n= Ncarnot /1.5 and the COP = COPCarnot/1.5, how
much heat does the engine absorb from the 5O0K reservoir?
An engine has a thermal efficiency of 40%. It is used to drive a refrigerator having a COP of 5.0.Heat Removed from the cold body by the refrigerator is 1 kJ. What should be the heat input to theengine?
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- The thermal efficiency of a Carnot heat engine is 30%. If the engine is reversed in operation to work as a heat pump with same operating conditions then what will be the COP for heat pump?arrow_forwardFor a power system operates with Wcycle = 810 BTU and Qout = 1769 BTU. What is the thermal efficiency?arrow_forwardA belt-driven compressor is used in refrigeration system that will cool 10 liters per second of water from 130C to 10C. The belt efficiency is 98%, motor efficiency is 85% and the input of the compressor is 0.7kW per ton of refrigeration. Find the actual COP if the overall efficiency is 65%.arrow_forward
- A heat pump operates between temperature ranges of 100 C and 250 C. Find its COP. What will be its efficiency if the heat engine operates in the same temperature range?arrow_forward/arrow_forwardA cold storage plant of 30 tonnes of refrigeration capacity runs with its performance just th of its 25% of Carnot COP. Inside temperature is -10°C and atmospheric temperature is 25ºC. Calculate the power required to run the plant. [Note: 1 ton of refrigeration = 3.52 kW]arrow_forward
- One 2 RT capacity air-cooler consumes 1.8 kW electricity. Estimate the COP of the system and the heat rejected to the environment.arrow_forwardQ6) A refrigerator with R-12 as the working fluid has a minimum temperature of -10°C and a maximum pressure of 1 MPa. Assume an ideal refrigeration cycle. Find the specific heat transfer from the cold space and that to the hot space, and the coefficient of performance. [107 kJ/kg, 133.9 kJ/kg, 3.98]arrow_forwardThe refrigeration system of a food production firm is run using the Reversed Carnot Cycle. The temperature of the hot refrigerant supply in the system should be 52°C, while the temperature of the sink should be -14°C. Its capacity is projected to be at least 24 tons. It's important not to disregard losses. Find and Show unit analysis and conversion: a. COP and COP of Heat Pump b. Heat rejected from the system in kW c. Network in, Hp and Energy Efficiency Ratioarrow_forward
- What is the maximum efficiency of heat engine working between 1500K and 300K temperature. If such engine generates 320 kW of work after extracting 700 kJ/s heat from 1500K source, find the second law efficiency.arrow_forward6.) Pineapple fruits with a mass of 500 kg are supplied to a cold storage at 20 C. The cold storage is maintained at 5 C and the fruits get cooled to a storage temperature in 10 hours. The latent heat of freezing is 105 kJ/kg and the specific heat of fruit is 1.256 kJ/kg.K. Find the refrigeration capacity of the plant.arrow_forward5. A heat engine release heat into the cold reservoir at 500 K with a carnot efficiency of 25 %. What exhaust temperature will increase the carnot efficiency to 60 %?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Refrigeration and Air Conditioning Technology (Mi...Mechanical EngineeringISBN:9781305578296Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill JohnsonPublisher:Cengage Learning
Refrigeration and Air Conditioning Technology (Mi...
Mechanical Engineering
ISBN:9781305578296
Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher:Cengage Learning
Thermodynamic Availability, What is?; Author: MechanicaLEi;https://www.youtube.com/watch?v=-04oxjgS99w;License: Standard Youtube License