A dryer is to deliver 1,000 kg/hour of palay with a final moisture content of 10%. The initial moisture content in the feed is 15% at atmospheric condition with 32°C dry bulb and 21°C wet bulb. The dryer is maintained at 45°C while the relative humidity of the hot humid air from the dryer is 80%. If the steam pressure supplied to the heater is 2 MPaa, determine: a) amount of palay supplied to the dryer in kg/hr and the temperature of the hot humid air from the dryer in °C. b) air supplied to the dryer in m3/hr. c) heat capacity of the heater in kW; and d) steam supplied to the heater in kg/hr.

A dryer is to deliver 1,000 kg/hour of palay with a final moisture content of 10%. The initial moisture content in the feed is 15% at atmospheric condition with 32°C dry bulb and 21°C wet bulb. The dryer is maintained at 45°C while the relative humidity of the hot humid air from the dryer is 80%. If the steam pressure supplied to the heater is 2 MPaa, determine: a) amount of palay supplied to the dryer in kg/hr and the temperature of the hot humid air from the dryer in °C. b) air supplied to the dryer in m3/hr. c) heat capacity of the heater in kW; and d) steam supplied to the heater in kg/hr.

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

Chapter36: Refrigeration Applied To Air-conditioning

Section: Chapter Questions

Problem 9RQ: What are higher-efficiency refrigerant blends that can be used as long-term replacements for R-22 in...

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A dryer is to deliver 1,000 kg/h of palay with final moisture content of 10%. The initial moisture content in the feed is 15% at atmospheric condition with 30 oC dry bulb and 20 oC wet bulb. The dryer is maintained at 45oC while the relative humidity of the hot humid air from the dryer is 80%. If the steam pressure supplied to the heater is 2 MPa, determine the following: a.) Palay supplied to the dryer in kg/h. b.) Temperature of the hot humid air from the dryer in oC. c.) Air supplied to dryer in cu m/h. d.) Heat supplied by the heater in k W. e.) Steam supplied to heater in kg/h.
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