Heat recovery apparatus and method
A flue gas heat recovery apparatus for reconstituting thermal energy normally lost through the venting of flue gases from a heat liberating plant is disclosed. The apparatus can be employed with forced air or hydronic systems and includes a compressor which draws hot gases from the exhaust flue through a first heat exchanger located in a cold fluid return to the plant, thereby transferring thermal energy from the gases to fluid (typically air or water) flowing in the return duct. The compressor operates to substantially elevate the pressure and temperature of the flue gases passing therethrough and discharges them through a second heat exchanger located in the return duct upstream of the first heat exchanger to further transfer thermal energy from the gases to the fluid flowing therein. Gases exiting the second heat exchanger are directly vented to the atmosphere or, alternatively, are first filtered to remove particulate matter. Additionally, the compressor can be disposed within the return duct to provide still more transfer of thermal energy to the return duct fluid.
- Assignee:
- EDB-84-129905
- Patent Number(s):
- US 4429661
- OSTI ID:
- 6697112
- Country of Publication:
- United States
- Language:
- English
Similar Records
Heat recovery device for use in return air duct of forced air furnace for recovering heat from the flue of such furnace
Heat recovery device for use in return air duct of forced air furnace for recovering heat from the flue of such furnace
Related Subjects
200105 -- Fossil-Fueled Power Plants-- Heat Utilization
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320304* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Waste Heat Recovery & Utilization
COMPRESSORS
CONTROL EQUIPMENT
DESIGN
DRAFT CONTROL SYSTEMS
DUCTS
ENERGY RECOVERY
EQUIPMENT
EXHAUST GASES
FILTERS
FLOW REGULATORS
FLUE GAS
FLUIDS
GASEOUS WASTES
GASES
HEAT EXCHANGERS
HEAT RECOVERY
HEAT RECOVERY EQUIPMENT
POWER PLANTS
RECOVERY
THERMAL POWER PLANTS
WASTE HEAT UTILIZATION
WASTE PRODUCT UTILIZATION
WASTES