The invention relates to a condensation heat exchanger which comprises: —at least two concentric bundles (5, 5′) of tubes made from a material that is a good thermal conductor, inside which tubes a heat-transfer fluid is intended to circulate, each bundle of tubes (5, 5′) comprising a series of tubes (50, 50′) in the form of an arc of a circle, the tubes of each bundle (5, 5′) being arranged in parallel planes with a gap (53, 53′) between two adjacent tubes (50, 50′), —a single collector (6) made of a material that is a good conductor of heat and to which the two ends (51, 51′, 52, 52′) of each tube (50, 50′) of the various bundles (5, 5′) are connected, this collector (6) being equipped with inlet (61) and outlet (62) couplings. This exchanger is notable in that the collector (6) comprises several partitions delimiting various channels, which allow the fluid that is to be warmed up to be made to circulate in the various successive bundles from the outermost bundle to the innermost bundle.

A helical fractal heat exchanger comprises a heat exchanger core defining a plurality of helical, first fluid conduits arranged in a two-dimensional grid configuration, and plurality of helical, second fluid conduits in thermal communication with the first fluid conduits. A first fluid inlet structure splits a first fluid from a first fluid inlet of the heat exchanger and supplies it to each of the plurality of first fluid conduits, and a first fluid outlet structure recombines the first fluid from the plurality of first fluid conduits and conveys it to a first fluid outlet of the heat exchanger. The first fluid inlet and outlet structures are each fractal structures comprising at least two multi-furcation stages in which a parent channel divides into two or more sub-channels that diverge away from each other.

A heat exchanger includes first and second fluid circuits. The first fluid circuit is formed by a first set of fins, a first inlet header, and a first outlet header. The first set of fins extend radially and are coaxial with each other. The first inlet header is fluidly connected to and is disposed on an upstream end of the first fins. The first outlet header is fluidly connected to and is disposed on a downstream end of the first fins. The second fluid circuit is formed by a second set of fins, a second inlet header, and a second outlet header. The second fins extend radially and are coaxial with each other. An annular shape of the second inlet header conforms to the circular shape of the first inlet header. An annular shape of the second outlet header conforms to the circular shape of the first outlet header.

A heat exchanger includes a first set of fins, a second set of fins, and an exterior wall. The first set of fins extend radially and are coaxial with each other. The first set of fins forms a first set of channels. The second set of fins extend radially and are coaxial with each other. The second set of fins forms a second set of channels. Channels of the first and second sets of channels are disposed in an alternating pattern in a circumferential direction of the heat exchanger. The first and second sets of fins are integrally formed together. A cross-sectional width of a channel of at least one of the first set of channels and the second set of channels increases as a radial distance from a centerline axis of the heat exchanger increases.

Aspects of the disclosure are directed to a heat exchanger comprising: a first plurality of channels configured to convey a first medium at a first set of temperatures along a first span of the first plurality of channels, the first set of temperatures including a first inlet temperature and a first outlet temperature, a second plurality of channels configured to convey a second medium at a second set of temperatures along a second span of the second plurality of channels, the second set of temperatures being at least partially different from the first set of temperatures and including a second inlet temperature and a second outlet temperature, and a core region where the first plurality of channels and the second plurality of channels are co-mingled with respect to one another.

The invention relates to a container (1) for recovering the heat energy of wastewater. The container (1) comprises a shell (10) and a continuous spiral pipe (2) for conveying wastewater through the container in a vertical direction. A first heat transfer space for a heat transfer liquid is arranged between an outer shell of the spiral pipe (2) and the shell (10) of the container (1), and a second heat transfer space is arranged inside the spiral pipe (2). The shell (10) is provided with at least one openable inspection hatch (6) having fastened thereto a manifold (7) as well as a shell and tube heat exchanger (3) having its inlet and outlet ends coupled to said manifold (7). The spiral pipe (2) consists of acid-proof or stainless steel and its internal surface is adapted to have a higher chromium content than the other parts of the spiral pipe's wall.

The invention relates to a method for controlling the recovery of heat energy from a wastewater (J) flow present in a spiral pipe (2) into a heat transfer fluid (L) flowing in a first heat transfer space (4) inside a container (1) with a temperature difference between the wastewater (J) and the heat transfer fluid (L). The method comprises the steps of adjusting the ratio (V3N5) of two heat transfer fluid volume flows (V3, V5) by adjusting the heat transfer coefficient through the spiral pipe's (2) walls by means of form factors of the spiral pipe's helices (21-28), by measuring the temperature of the heat transfer fluid (L) and/or the temperature of the wastewater (J), and by controlling the temperature of the wastewater (J) to be all the time higher than the temperature of the heat transfer fluid (L). The invention also relates to an adjustment system.

A method of constructing a coil wound heat exchange module and transporting and installing the coil wound heat exchange module at a plant site, such as an natural gas liquefaction plant. A module frame is constructed and attached to a heat exchanger shell prior to telescoping of a coil wound mandrel into the shell. The module frame includes a lug and two saddles that remain attached to the shell throughout the process and when the heat exchanger is operated. The lug and saddles are constructed and located to stabilize the shell during construction, telescoping and transport (when in a horizontal orientation), and when the shell is installed at the plant site (in a vertical orientation). The lugs and saddles are adapted to allow for thermal expansion and contraction of the shell when it is transitioned from ambient to operating temperature and vice versa.

A geothermal heat exchange apparatus is disclosed that includes a central conduit, a plurality of pipes, at least one fitting and a joint. The geothermal heat exchange apparatus is preassembled for insertion into a bore hole and for connection to a supply primary pipe and a return primary pipe that are in fluid communication with a heat pump. The geothermal heat exchange apparatus includes the plurality of pipes in a helical arrangement around the central conduit for geothermal heat exchange. The at least one fitting is fixedly connected to a first end portion of the central conduit in the bore hole.

A counter-flow heat exchanger is provided that includes: a first fluid path having a first supply tube connected to a first transition area separating the first fluid path into a first array of first passageways, with the first array of first passageways merging at a first converging area into a first discharge tube; and a second fluid path having a second supply tube connected to a second transition area separating the second fluid path into a second array of second passageways, with the second array of second passageways merge at a second converging area into a second discharge tube. The first passageways and the second passageways have a substantially helical path around the centerline of the counter-flow heat exchanger. Additionally, the first array and the second array are arranged together such that each first passageway is adjacent to at least one second passageway.