Recovery heat exchange to conserve energy in wood drying. Final report

Technical Report · Sat Jun 01 04:00:00 EDT 1985

OSTI ID:5164613

Rosen, H N

The North Central Forest Experiment Station of the Forest Service has had an ongoing program since 1974 to conserve energy in wood drying without reducing wood quality. We have suggested ways to conserve energy, developed new drying techniques which were less energy intensive than conventional methods, and investigated recovery of vent stream energy with bench-scale heat exchangers. This study is a culmination of our efforts to conserve energy in lumber drying by vent stream recovery in a conventional dry kiln. An experimental 600 bf kiln was fitted with a recovery heat exchanger to utilize the vent stream from a 100 bf prototype pressure steam dryer. Four runs were conducted, two with green yellow-poplar in both the kiln and pressure steam dryer, and two with air-dried red oak in the kiln and green silver maple in the pressure steam dryer. The dryers were instrumented so that air and steam temperatures, pressures, steam rates, electrical consumption, and humidity could be monitored on a periodic basis. Determinations of lumber physical characteristics before and after drying were made so that changes in quality of the lumber as a result of drying could be determined.

• Research Organization: North Central Forest Experiment Station, St. Paul, MN (USA)
• DOE Contract Number: AI01-80CS40452
• OSTI ID: 5164613
• Report Number(s): DOE/CS/40452-T1; ON: DE85013631
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320303* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Equipment & Processes
CONTROL
DRYING
ENERGY CONSERVATION
ENERGY RECOVERY
HEAT EXCHANGERS
HEAT RECOVERY
INDUSTRY
MAPLES
OAKS
PAPER
PLANTS
QUALITY CONTROL
RECOVERY
TREES
WASTE HEAT UTILIZATION
WASTE PRODUCT UTILIZATION
WOOD