Enhancement of heat transfer in waste-heat heat exchangers

Technical Report · Tue Jul 01 00:00:00 EDT 1980

DOI:https://doi.org/10.2172/6882134· OSTI ID:6882134

The Fluidfire shallow fluidized bed heat transfer facility was modified during this program to give increased air flow capacity and to allow testing with different distributor plates and with two-stage heat exchangers. Tests were conducted using this heat transfer facility to investigate the effect of reduced distributor plate pressure loss and amount and type of bed material on the heat transfer performance of a single-stage fluidized bed heat exchanger. Elutriation from the bed was measured for different bed materials and distributor plates; alternate heat exchanger surfaces having different fin spacings were also tested. Two types of two-stage fluidized bed heat exchangers were tested: one having a baffle (having almost no pressure loss) located between the stages and which allowed bed material to recirculate between upper and lower beds; the second having two distributor plates in series with no recirculation of the bed material. The results obtained in the experimental program were used in conceptual design studies of multi-stage fluidized bed heat exchangers for waste heat recovery from diesel engine exhaust gases. Information was obtained from the literature and from diesel engine manufacturers to determine allowable diesel engine operating back pressures. The costs were estimated for two- and three-stage designs and were compared with costs obtained previously for single-stage fluidized bed and conventional heat exchanger designs.

• Research Organization: United Technologies Research Center, East Hartford, CT (United States)
• DOE Contract Number: AC03-77ET11348
• OSTI ID: 6882134
• Report Number(s): DOE/ET/11348-T1
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
DIESEL ENGINES
WASTE HEAT
FLUIDIZED BED HEAT EXCHANGERS
DESIGN
PERFORMANCE
HEAT RECOVERY EQUIPMENT
HEAT TRANSFER
AUGMENTATION
COST
EXPERIMENTAL DATA
FLUIDIZED BED
HEAT RECOVERY
NUMERICAL DATA
PARTICLE SIZE
DATA
ENERGY
ENERGY RECOVERY
ENERGY TRANSFER
ENGINES
EQUIPMENT
HEAT
HEAT ENGINES
HEAT EXCHANGERS
INFORMATION
INTERNAL COMBUSTION ENGINES
RECOVERY
SIZE
WASTES
320304* - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Waste Heat Recovery & Utilization