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A process to liquify nitrogen gas (N2) from 300K, 200atm to 98.69K (saturation temperature) and 7atm is to be designed. The specific enthalpy of the saturated liquid and saturated vapor at 7atm are, Hl = 74.7 J/g and Hv = 239.2 J/g respectively. Consider first using a throttle valve alone. Sketch the path corresponding to the conditions given above on the T-S diagram on the next page. Is it possible to achieve liquefaction by a throttle valve alone? State and justify your reasoning.

A process to liquify nitrogen gas (N2) from 300K, 200atm to 98.69K (saturation temperature) and 7atm is to be designed. The specific enthalpy of the saturated liquid and saturated vapor at 7atm are, Hl = 74.7 J/g and Hv = 239.2 J/g respectively. Consider first using a throttle valve alone. Sketch the path corresponding to the conditions given above on the T-S diagram on the next page. Is it possible to achieve liquefaction by a throttle valve alone? State and justify your reasoning.

Refrigeration and Air Conditioning Technology (MindTap Course List)
Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN:9781305578296
Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Chapter25: Special Refrigeration System Components
Section: Chapter Questions
Problem 7RQ: Two types of relief valves are_______and ______.
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A process to liquify nitrogen gas (N2) from 300K, 200atm to 98.69K (saturation
temperature) and 7atm is to be designed. The specific enthalpy of the saturated liquid and
saturated vapor at 7atm are, Hl = 74.7 J/g and Hv = 239.2 J/g respectively.

Consider first using a throttle valve alone. Sketch the path corresponding to the conditions
given above on the T-S diagram on the next page. Is it possible to achieve liquefaction by a
throttle valve alone? State and justify your reasoning.

 

ENTROPY, Col/ gm "K or BTU/ Ib "R LD 300 540 290 200 s00 TEMPERATURE-ENTROPY CHART FOR NITROGEN 400 PRESSURE, PI DEHSIT, TEMPERATUNE ENTHALPY, IHI ENTROPY Natel Bue Stendards Cr e ineing Lebereter 460 440 240 20 130 400 220 s00 200 no 340 340 320 300 H200 de/ 260 130 240 240 130 120 200 100 H180 30 H160 H40 230 120 LO 20 40 ENTROPY, Joules / gm*K Fig. 44 .... Temperoture-Entropy Diagram for Refrigerant 728 TEMPERATURE, K TEMPERATURE, "R
Transcribed Image Text:ENTROPY, Col/ gm "K or BTU/ Ib "R LD 300 540 290 200 s00 TEMPERATURE-ENTROPY CHART FOR NITROGEN 400 PRESSURE, PI DEHSIT, TEMPERATUNE ENTHALPY, IHI ENTROPY Natel Bue Stendards Cr e ineing Lebereter 460 440 240 20 130 400 220 s00 200 no 340 340 320 300 H200 de/ 260 130 240 240 130 120 200 100 H180 30 H160 H40 230 120 LO 20 40 ENTROPY, Joules / gm*K Fig. 44 .... Temperoture-Entropy Diagram for Refrigerant 728 TEMPERATURE, K TEMPERATURE, "R
Heat Exchanger 4 1 2 Throttle Valve Liquid Nitrogen 3
Transcribed Image Text:Heat Exchanger 4 1 2 Throttle Valve Liquid Nitrogen 3
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