Dampers placed on the half face of the inlet and the outlet of side-by-side airflow energy recovery sections used as recirculation path
An air handler includes a housing with a heat exchanger core. The housing includes a faceplate, a roof panel, a base panel, a first side panel, and a second side panel. A first tunnel and a second tunnel are connected to the housing at the faceplate. A septum protrudes from the faceplate and connects the core at a front edge. The air handler further includes a first recirculation path and a second recirculation path inside the housing. The first and second recirculation paths are defined by the septum, the housing, and the core. The first and second recirculation paths are configured to direct a portion of airflow from the first tunnel to the second tunnel. The air handler further includes a first damper and a second damper disposed on the faceplate and configured to obstruct the first recirculation path and the second recirculation path respectively.
1. An air handler for an HVACR system, comprising:
a housing having a faceplate, a roof panel, a base panel, a first side panel, and a second side panel;
a septum protruding into the housing from a first side of the faceplate;
a core disposed within the housing and having a front edge connected to an edge of the septum, a top edge connected to the roof panel, a bottom edge connected to the base panel, a first side plate connected to the first side panel, and a second side plate connected to the second side panel;
a first tunnel connected to a first area on the faceplate from a second side of the faceplate, wherein the second side is opposite to the first side of the faceplate;
a second tunnel connected to a second area of the faceplate from the second side, wherein the second area is disjointed from the first area;
a first recirculation path defined by the faceplate, the roof panel, the septum, the first side panel, the second side panel, and the core and configured to channel a first portion of airflow from the first tunnel to the second tunnel;
a first damper disposed in the second area of the faceplate and configured to obstruct the first recirculation path; and
a first opening disposed in the first area of the faceplate and connecting the first tunnel to the first recirculation path.
2. The air handler of claim 1 , wherein
the first damper is disposed adjacent to the first side panel and the roof panel.
3. The air handler of claim 1 , wherein
the first opening is adjacent to the second side panel and the roof panel.
4. The air handler of claim 1 , wherein
the first tunnel is an indoor air inlet from a controlled space, and
the second tunnel is an indoor air return to the controlled space.
5. The air handler of claim 1 , wherein
the core includes a fixed plate heat exchanger or a rotary type wheel heat exchanger.
6. The air handler of claim 1 , wherein
the core is in a horizontal configuration substantially parallel to the septum, and
when the core includes a fixed plate heat exchanger, the fixed plate heat exchanger includes heat transfer plates that are in a vertical configuration, and
when the core includes a rotary type wheel heat exchanger, the rotary type wheel heat exchanger includes at least two side-by-side wheels.
7. The air handler of claim 1 , wherein
the first tunnel and the second tunnel are separated by a middle of unit wall that is substantially perpendicular to the faceplate on a first plane and substantially perpendicular to the septum on a second plane, wherein the second plane is substantially perpendicular to the first plane.
8. The air handler of claim 1 , wherein
the first damper includes a plurality of sections that are configured to open or close independently among one another or in unison.
9. The air handler of claim 1 , wherein
the first damper obstructs the first portion of the airflow from entering the second tunnel when the first damper is in a closed position.
10. The air handler of claim 1 , wherein
the first portion of the airflow is recirculated to the second tunnel through the first opening when the first damper is in an open position.
11. The air handler of claim 1 , wherein
the airflow enters the first tunnel from a controlled space is recirculated into the controlled space when the first damper is in an open position.
12. The air handler of claim 1 , wherein
the core further includes at least one of a bypass damper or a defrost damper.
13. A method of providing recirculation capabilities using an air handler with a core, comprising:
opening a first damper;
receiving vented indoor air from a controlled space through a first tunnel;
channeling a first portion of the vented indoor air from the first tunnel to a second tunnel through a first opening, a first recirculation path, and the first damper; and
returning the first portion of the vented indoor air from the second tunnel into the controlled space, wherein
the air handler has a housing that includes a faceplate, a roof panel, a base panel, a first side panel, and a second side panel,
a septum protrudes into the housing from a first side of the faceplate,
the housing contains the core having a top edge connected to the roof panel, a bottom edge connected to the base panel, a front edge connected to the septum, a first side plate connected to the first side panel, and a second side plate connected to the second side panel,
the first tunnel connects to the faceplate at a first area of a second side of the faceplate, wherein the second side is opposite to the first side of the faceplate,
the second tunnel connects to the faceplate at a second area of the first side of the faceplate, wherein the second area is disjointed from the first area,
the first damper is disposed in the second area on the faceplate,
the first opening is disposed in the first area on the faceplate, and
the first recirculation path is defined by the roof panel, the faceplate, the first side panel, the second side panel, the septum, and the core.
14. The method of claim 13 , further comprising:
closing the first damper;
obstructing the vented indoor air in the first recirculation path from entering into the second tunnel;
channeling the vented indoor air in the first tunnel into the first recirculation path through the first opening;
channeling the vented indoor air in the first recirculation path into the core;
channeling fresh air into the core;
exchanging energy in the core between the vented indoor and the fresh air;
channeling the fresh air in the core into the second tunnel through a second opening;
exhausting the vented indoor air from the core after exchanging energy; and
channeling the fresh air from the second tunnel to the controlled space.
15. The method of claim 13 , wherein
the first damper is disposed adjacent to the first side panel and the roof panel, and
the first opening is adjacent to the second side panel and the roof panel.
16. The method of claim 13 , wherein
the first tunnel is an indoor air inlet from the controlled space, and
the second tunnel is an indoor air return to the controlled space.
17. The method of claim 13 , wherein
the core includes a fixed plate heat exchanger or a rotary type wheel heat exchanger.
18. The method of claim 13 , wherein
the core is in a horizontal configuration substantially parallel to the septum, and
when the core includes a fixed plate heat exchanger, the fixed plate heat exchanger includes heat transfer plates of the core are in a vertical configuration, and
when the core includes a rotary type wheel heat exchanger, the rotary type wheel heat exchanger includes at least two side-by-side wheels.
19. The method of claim 13 , wherein
the first tunnel and the second tunnel are separated by a middle of unit wall that is substantially perpendicular to the faceplate on a first plane and substantially perpendicular to the septum on a second plane, wherein the second plane is substantially perpendicular to the first plane.
20. The method of claim 13 , wherein
the first damper includes a plurality of sections that are configured to open or close independently among one another or in unison.