Air is compressed in a frictionless steady-flow process from 70kN/m² ,-29°C and a specific volume of 1 m3 /kg to 100 kN/m² in such a manner that p(v + 0.5) = constant ,where v is in m³ /kg. Inlet velocity is negligibly small and discharge velocity is 100 m/s. The flow rate is 0.2 kg/s. Calculate the work required in kW. Answer: - 5.49 kW

Air is compressed in a frictionless steady-flow process from 70kN/m² ,-29°C and a specific volume of 1 m3 /kg to 100 kN/m² in such a manner that p(v + 0.5) = constant ,where v is in m³ /kg. Inlet velocity is negligibly small and discharge velocity is 100 m/s. The flow rate is 0.2 kg/s. Calculate the work required in kW. Answer: - 5.49 kW

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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Concept explainers

Entropy

In physics, entropy means the amount of disorder or the degree of randomness associated with a thermodynamic system. The system is not self-organized when the entropy of the system is high. For instance, when a system is at an elevated temperature, its molecules are in random motion, vibrating and colliding with each other. During this scenario, the probability of finding a molecule at a particular place twice, is low. Under this circumstance, the system can be said to be in a high entropy.

Question

Instructions: Show solution step by step with Units.

Please answer it in 1 hr.

Subject: Thermodynamics

Topic: Work and Heat

Thermodynamics:
Air is compressed in a frictionless steady-flow process from 70kN/m² , –29 °C and a specific volume of
1 m3 /kg to 100 kN/m² in such a manner that p(v + 0.5) = constant ,where v is in m3 /kg. Inlet
velocity is negligibly small and discharge velocity is 100 m/s. The flow rate is 0.2 kg/s. Calculate the work
required in kW.
Answer: - 5.49 kW
Methane enters a compressor at 14 psia with a very low velocity and is compressed to 55 psia. The
entering methane has a density of 0.04 lbm/ft3. The methane leaves the compressor with a velocity of
250 fps. The flow rate is 0.38 Ibm/s. Assuming a quasi-equilibrium process in which pv1.33 = constant,
calculate the work done on the methane in hp.
Answer: -57.4 hp

Science that deals with the amount of energy transferred from one equilibrium state to another equilibrium state.

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