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**24.27 In the vapor-recompression evaporator shown in Figure P24.27, the vapor produced on evaporation is compressed to a higher pressure and passed through the heating coil to provide the energy for evaporation. The steam entering the compressor is 98% vapor and 2% liquid, at 10 psia; the steam leaving the compressor is at 50 psia and 400°F; and 6 Btu of heat are lost from the compressor per pound of steam throughput. The condensate leaving the heating coil is at 50 psia, 200°F. (a) Compute: The Btu of heat supplied for evaporation in the heating coil per Btu of work needed for compression by the compressor. (b) If 1,000,000 Btu per hour of heat is to be transferred in the evaporator, what must be the intake capacity of the compressor in ft³ of wet vapor per minute? Compressor Heating Coil Condensote Figure P24.27

**24.27 In the vapor-recompression evaporator shown in Figure P24.27, the vapor produced on evaporation is compressed to a higher pressure and passed through the heating coil to provide the energy for evaporation. The steam entering the compressor is 98% vapor and 2% liquid, at 10 psia; the steam leaving the compressor is at 50 psia and 400°F; and 6 Btu of heat are lost from the compressor per pound of steam throughput. The condensate leaving the heating coil is at 50 psia, 200°F. (a) Compute: The Btu of heat supplied for evaporation in the heating coil per Btu of work needed for compression by the compressor. (b) If 1,000,000 Btu per hour of heat is to be transferred in the evaporator, what must be the intake capacity of the compressor in ft³ of wet vapor per minute? Compressor Heating Coil Condensote Figure P24.27

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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**24.27 In the vapor-recompression evaporator shown in Figure P24.27, the vapor produced on evaporation is compressed to a higher pressure and passed through the heating coil to provide the energy for evaporation. The steam entering the compressor is 98% vapor and 2% liquid, at 10 psia; the steam leaving the compressor is at 50 psia and 400°F; and 6 Btu of heat are lost from the compressor per pound of steam throughput. The condensate leaving the heating coil is at 50 psia, 200°F. (a) Compute: The Btu of heat supplied for evaporation in the heating coil per Btu of work needed for compression by the compressor. (b) If 1,000,000 Btu per hour of heat is to be transferred in the evaporator, what must be the intake capacity of the compressor in ft³ of wet vapor per minute? Compressor Heating Coil Condensote Figure P24.27
Transcribed Image Text:**24.27 In the vapor-recompression evaporator shown in Figure P24.27, the vapor produced on evaporation is compressed to a higher pressure and passed through the heating coil to provide the energy for evaporation. The steam entering the compressor is 98% vapor and 2% liquid, at 10 psia; the steam leaving the compressor is at 50 psia and 400°F; and 6 Btu of heat are lost from the compressor per pound of steam throughput. The condensate leaving the heating coil is at 50 psia, 200°F. (a) Compute: The Btu of heat supplied for evaporation in the heating coil per Btu of work needed for compression by the compressor. (b) If 1,000,000 Btu per hour of heat is to be transferred in the evaporator, what must be the intake capacity of the compressor in ft³ of wet vapor per minute? Compressor Heating Coil Condensote Figure P24.27
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