A refrigeration cycle operates between two reservoirs at 320 K and 285 K, rejecting 920 kW to the hot reservoir. If the cycle's CoP is 7, calculate the required power input, in kW For the same refrigeration capacity (you need to use rate of energy removed from the cold reservoir), determine the minimum theoretical power input, in kw Drag and drop the nearest values. 55 70 85 100 115 130 145 42 53 |60 75 82 96|| 99

A refrigeration cycle operates between two reservoirs at 320 K and 285 K, rejecting 920 kW to the hot reservoir. If the cycle's CoP is 7, calculate the required power input, in kW For the same refrigeration capacity (you need to use rate of energy removed from the cold reservoir), determine the minimum theoretical power input, in kw Drag and drop the nearest values. 55 70 85 100 115 130 145 42 53 |60 75 82 96|| 99

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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A reversible power cycle operating as in the figure receives energy QH by heat transfer from a hot reservoir at TH and rejects energy Qc = 10 Btu by heat transfer to a cold reservoir at Tc = 40°F. The work for the cycle Wcycle = 30 Btu. Determine the thermal efficiency and TH, in °F. Step 1 Determine the thermal efficiency. n = i % Hot reservoir Cold reservoir Он Wcycle
You have been tasked with the evaluation of alternate technologies for baseload power generation for a large urban center. The technologies to be considered are (1) coal fired power, (2) gas fired power, (3) nuclear power, (4) solar thermal power with storage, and (5) hydroelectric power. The criteria for assessment and relative weightings are presented below. Criterion Weighting (%) Capital Cost Generation Capacity Environmental Requirements and Impacts Social Acceptance Reliability 25 20 15 10 30 Review the literature for information relevant to each of the selection criteria for the technologies to be considered. Use a Kepner-Tregoe scorecard to determine the weighted scores for each technology option. Your scorecard should include a brief technical justification for the technology options against each criterion, together with references to the cited sources.
THA= 31 Celcius Degree TLA= 8 Celcius Degree QLA= 72 kW WA= 12 kW THB= 33 Celcius Degree TLB= 4 Celcius Degree QLB= 36 kW WB= 6 kW
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QH = 7 kW, Q, = 3 kW, W = 5 kW b. Q„ = 7 kW, Q, : c. Q„ = 7 kW, Q, а. = 7 kW, W = 0 kW с. = 4 kW, W = 3 kW d. Q = 7 kW, Q, = 0 kW, W = 7 kW For each of the cases in Problem 5.21, determine if a heat pump satisfies the first law (energy equation) and if it violates the second law.
This is a repeated question. I have asked this question but it was rejected. I am submitting the problems to check my understanding. I completed the problems already and I am not being graded on them. If you are able to, please state your assumptions and table.
Q7. The net work done per engine cycle in a 4-stroke petrol internal combustion engine is 3860 J. The engine has 4 cylinders and the crank shaft rotates at a rate of 1500 revolutions per minute. The rate of energy lost due to friction is 810 W. Calculate: a. the number of cycles per second b. the indicated power of the engine
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