The disclosure relates to a heat transfer assembly for a rotary regenerative heat exchanger. The assembly includes a rotor arranged between at least two separated fluid flow passages passing flow axially through the rotor, where each flow passage is connected to a sector part of the rotor. The assembly further includes a plurality of channels in the rotor for flowing a fluid through the rotor, each of the channels is enclosed by heat transfer and heat accumulating surfaces in the rotor, and the heat transfer and heat accumulating surfaces of the channels are made in a material providing an average axial thermal conductivity less than 100 W/mK arranged to reduce the Longitudinal Heat Conductivity of the rotor.

A heat transfer element for a rotary heat exchanger includes a plate having a plurality of elongate notches formed therein at spaced intervals and oriented at a first angle relative to a flow direction. The plate further includes a plurality of elongate undulations formed therein at spaced intervals and oriented a second angle relative to the flow direction, wherein the first angle is different than the second angle. A first height of each of said plurality of elongate notches is larger than a second height of each of said plurality of elongate undulations. A plurality of heat transfer elements may be stacked in a container for installation in the rotary heat exchanger.

A rotary heat exchanger for preheating air using waste heat includes a plurality of heat transfer elements movable between first and second openings in a housing to exchange heat between heated exhaust gases and a stream of fresh air. At least one heat transfer element includes a first plate having a plurality of elongate notches formed therein at spaced intervals and oriented at a first angle relative to the flow direction. The plate also includes a plurality of turbulators formed in the spaced intervals between the plurality of elongate notches, the plurality of turbulators being arranged in a two-dimensional pattern. The heat transfer elements may be stacked in a container for installation in the rotary heat exchanger.

A stack of heating surface elements includes a first heating surface element (4) having first (10), second (12) and third (14) zones arranged sequentially along a primary gas flow direction (A). The first zone (10) includes a herringbone structure, the second zone (12) includes a flat structure, and the third zone (14) includes a plurality of corrugations extending in the primary gas flow direction (A). The corrugations have flat peak and trough regions. The stack also includes a second heating surface element (36), where the second heating surface element includes a plurality of corrugations extending in the primary gas flow direction (A).

The present disclosure relates to an energy recovery wheel for a heating, ventilation, and/or air conditioning (HVAC) system. The energy recovery wheel includes a frame positioned within a passage of the HVAC system. The frame is configured to rotate about an axis of the passage relative to the HVAC system and includes an opening that is configured to transmit an air flow. The energy recovery wheel also includes a heat transfer element coupled to the frame and positioned within the opening, where the heat transfer element is permeable and configured to transition between a closed orientation to occlude the opening and direct the air flow across the heat transfer element and an open orientation to substantially unblock the opening and mitigate interaction between the air flow and the heat transfer element.

A heat transfer sheet assembly for a rotary regenerative heat exchanger has first and second heat transfer sheet elements stacked one against the other with a first repeat of a first profile on one sheet element opposing a second repeat of a second profile on the other sheet element. The sheet elements are spaced apart by a plurality of wide-gauged parallel sheet spacing features of the first profile repeat R1 of the second profile repeat to form a generally close sided elongate channel for gaseous flow therethrough. The second profile of repeat includes an elongate fifth sheet spacing feature in the form of a lobe contacting undulations of the adjacent first profile of repeat.

A radial seal assembly is disclosed for a regenerative heat exchanger. The radial seal assembly can include a mount having a first upstanding region and a first arcuate region. Here, the first upstanding region is configured to attach to a diaphragm of the heat exchanger. The radial seal assembly further includes a flexible radial contact or non-contact seal, wherein the seal further includes a second arcuate region. Here, the first arcuate region of the mount is configured to receive the second arcuate region of the flexible seal and securing the flexible seal therein.

Disclosed is a heat transfer assembly for a rotary regenerative preheater. The heat transfer assembly includes a plurality of heat transfer elements stacked in spaced relationship to each other in a manner such that each notch from a plurality of notches of one of the heat transfer element rests on respective flat sections from a plurality of flat sections of the adjacent heat transfer elements to configure a plurality of closed channels, each isolated from the other, wherein each of the channels has a configuration in a manner such that each of corrugation sections from a plurality of corrugation sections of one of the heat transfer elements faces respective undulation sections from a plurality of undulation sections of the adjacent heat transfer elements.

In the case of a heat exchanger element for equipping heat exchangers of flue gas cleaning systems of power stations, the heat exchanger element can be formed by a block shaped honeycomb body having four outer faces and two substantially parallel end faces and a sealing edge. The honeycomb body can be manufactured from a plastics material including a plurality of mutually parallel flow channels which are separated from each other by channel walls. The flow channels extend from the one to the other end face, and the sealing edge can be arranged in the region of one of the end faces and substantially parallel to this end face and extends away from the honeycomb body at the periphery of the honeycomb body.

A seal assembly includes a leaf assembly and a supplemental leaf assembly. The leaf assembly includes a first leaf having a first base section. The first base section defines a first fastening area for securing the first leaf to a diaphragm of the preheater. The first leaf has a first elongate section extending away from the first base section and terminating at a first distal end thereof. The leaf assembly further includes a second leaf that engages a portion of the first leaf. The second leaf has a second base section. The second base section defines a second fastening area for securing the second leaf to the diaphragm. The second leaf has a second elongate section extending away from the second base section and terminating at a second distal end thereof. The supplemental leaf assembly is secured to the first leaf and slidingly engaging the second leaf