The Heat Recovery System (HRS) uses the waste heat from the burner flues. This may be used to heat one or two final zones of the oven. These zones would not require burners, giving a saving in capital and running costs.
A proportion of the hot gases in the burner flues are diverted to an HRS collection pipe which runs along the top of the oven. Hot gases are collected from each zone with a burner. The hot gases are drawn along the collection pipe by a fan and blown into radiant ducts in the final oven zone.
Baker Pacific Indirect Radiant Oven with Heat Recovery System
The burner flue is connected to the HRS collection pipe and the flow of hot gases is controlled by dampers. One damper controls the exhaust flue and one damper controls the connecting pipe from the burner flue to the collection pipe. These dampers are set by the commissioning engineer to allow sufficient quantity of heat for the final zone(s) of the oven.
The HRS zone is constructed with radiant ducts above and below the oven band. The hot gases recovered from the burner flues are fed by the fan to the ducts. The fan is located on top of the oven at the end of the collection pipe.
The Heat Recovery System saves capital and running costs. By using recovered heat from the system shown, the fuel cost was reduced by 15%.
Details of the design and construction of the Heat Recovery System, with airflow calculations are included in the Baking Process and Engineering Manual available from Baker Pacific. For further details, please request at our Contacts page.