Research and Development of Industrial Drying Concepts Using a Superheated Steam Atmosphere with Exhaust Recompression (Phase 1 - Final Report: October 1989 to December 1990)

Technical Report · Tue Jan 01 04:00:00 EST 1991

DOI:https://doi.org/10.2172/6078066· OSTI ID:6078066

Dibella, Francis A. ^[1]; Doyle, Edward F. ^[1]; Becker, Frederick E. ^[1]; Lang, Russell ^[1]

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1. TECOGEN, Inc., Waltham, MA (United States)

For the thermal drying processes where water is to be removed via evaporation from the feedstock, attempts have been made to reduce the consumption of energy using exhaust waste heat recovery techniques, improved dryer designs, or even the deployment of advanced mechanical dewatering techniques. Despite these efforts, it is obvious that a large amount of thermal energy is often still lost if the latent heat of evaporation from the evaporated water cannot be recovered and/or in some way be utilized as direct heat input into the dryer. Tecogen Inc. is conducting research and development on an industrial drying concept. The concept utilizes a superheated steam drying atmosphere with exhaust steam recompression to recover the latent heat in the exhaust that would otherwise be lost. This approach has the potential to 55% of the energy required by a conventional air dryer. Work on Phase I: Feasibility Investigation, has been completed and the results of this work are given in this Phase I Final Report. Two designs are described for steam drying systems, one directly heated and one indirectly heated. The work on Phase I of the program also concentrated on identifying the most significant industrial applications for this superheated steam drying concept. The work consisted of evaluating information gathered from a literature search, a survey of industrial dryer manufacturers product brochures, and material provided by a major industrial dryer manufacturer. Results from the six tasks in Phase I are given. The tasks were: industrial applicability study; exploration of system configurations; designing system elements; laboratory testing; energy savings analysis; and program management and reporting. Reports on the first 5 tasks have been processed separately for inclusion on the data base.

• Research Organization: TECOGEN, Inc., Waltham, MA (United States)
• Sponsoring Organization: USDOE Idaho Operations Office (IO)
• DOE Contract Number: FC07-89ID12826
• OSTI ID: 6078066
• Report Number(s): DOE/ID/12826--1; TR--7020-009-91; ON: DE91009987
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010300 -- Coal
Lignite
& Peat-- Preparation-- (1987-)
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320303* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Equipment & Processes
320304 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Waste Heat Recovery & Utilization
ABSTRACTS
AIR
BENCH-SCALE EXPERIMENTS
COAL PREPARATION PLANTS
COMPARATIVE EVALUATIONS
COMPRESSORS
COST ESTIMATION
DATA
DESIGN
DOCUMENT TYPES
DRYERS
DRYING
ECONOMIC ANALYSIS
ECONOMICS
ENERGY
ENERGY CONSERVATION
ENERGY RECOVERY
ENERGY SYSTEMS
EQUIPMENT
FLUIDS
GASES
HEAT
HEAT RECOVERY
HEAT RECOVERY EQUIPMENT
INDUSTRIAL PLANTS
INFORMATION
LEADING ABSTRACT
MANAGEMENT
MARKETING RESEARCH
OPERATION
PERFORMANCE
PERFORMANCE TESTING
PROCESS HEAT
PROGRAM MANAGEMENT
PROGRESS REPORT
RECOVERY
STEAM SYSTEMS
TESTING
USES
WASTE HEAT
WASTES