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Giannoni France

Societe D'etude Et De Realisation Mecaniques Engeneering En Technologies Avancees

Sermeta

Giannoni, Rocco

Le Mer, Joseph

Rocco Giannoni

Joseph Le Mer

Remo Castelli

Giuseppe Bucci

Joseph LeMer

A tube profile (), in particular for manufacturing a heat exchanger for a condensing boiler, wherein the cross-section () of the tube profile () comprises: a rectangular portion () having two greater sides () parallel to each other and two smaller sides () parallel to each other and orthogonal to the greater sides (), and an ogival portion () defined by a convex flat figure formed by a base () and two curved sides () connected to each other in an apical zone () opposite to said base, wherein said base () coincides with a first side () of said two smaller sides () of the rectangular portion (), wherein said two curved sides () are symmetrical to an axis of symmetry (S-S) parallel to said greater sides () and passing through the central points () of said smaller sides (), wherein one end of each of said two curved sides () joins to one end of a respective one of said two greater sides ()) in a first joining point (PH), said each of said two curved sides () being tangent to said respective one of said two greater sides () in said first joining point (PH), and wherein an overall dimension of said ogival portion (HO) measured along said axis of symmetry (S-S) is greater than the length of said base (); wherein the two greater sides (), a second side of said two smaller sides (), and said two curved sides (), define the outer surfaces () of the walls of said tube profile ().

Tube winding for a gas heat exchange cell for a boiler

A heat exchange cell includes a casing, a heat exchanger in which a first heat transfer fluid flows, a feeding zone, and first and second collection chambers for a second heat transfer fluid. The casing can include rear, front, and peripheral side walls. The heat exchanger can be helically-shaped, mounted in the casing, and include at least one tubular duct for the flow of the first heat transfer fluid. The tubular duct can be coiled about a longitudinal axis and define a helix. The feeding zone of the second heat transfer fluid can be defined in the casing coaxially and internally with respect to the helix. The first chamber can be defined externally with respect to the heat exchanger by a radially outer wall thereof and the peripheral side wall. The second chamber can be at least partially delimited by at least one separating element.

Heat exchange cell and method

A heat exchange cell includes a helically-shaped heat exchanger, in which a first heat transfer fluid circulates; a first heat exchange chamber in which a first collection chamber is defined; a second heat exchange chamber in which a second collection chamber is defined; and a fluid outlet passage from the second heat exchange chamber. The first and second heat exchange chambers are separated by a first separating element comprising a substantially plate-shaped body and by at least a second separating element so as to define at least one passage of fluid between the first and the second collection chamber of the second heat transfer fluid. A pair of axial separator baffles extend axially between the second separating element and the rear wall of the containment casing, and are configured to separate a first portion of the second collection chamber from a second portion of the second collection chamber.

A heat exchange cell is described comprising a containment casing comprising a rear wall, a front wall and a peripheral side wall, a helically-shaped heat exchanger comprising at least one tubular duct for the flow of a first heat transfer fluid coiled about a longitudinal axis of the helix according to a plurality of coils and mounted in the containment casing; a feeding zone of a second heat transfer fluid, intended for the heat exchange with the first heat transfer fluid, defined in the casing coaxially and internally with respect to the heat exchanger; a first chamber for collecting the second heat transfer fluid externally defined with respect to the heat exchanger between a radially outer wall thereof and the peripheral side wall of the containment casing; and a second chamber for collecting the second heat transfer fluid at least partially delimited by at least one separating element.

A method is described of manufacturing a set of heat exchange cells (-) having a thermal power falling within a predetermined range of minimum and maximum values, each heat exchange cell (-) comprising at least one heat exchanger () mounted in a respective containment casing (), wherein the method comprises the steps of: a) providing a single containment casing () of a plurality of heat exchange cells (-1) of the set, the casing () having a constant axial extension as the thermal power of the cell (-) varies within the range of thermal power values and equal to the axial extension of the cell having the minimum thermal power within the range of thermal power values; b) providing a plurality of helically-shaped heat exchangers () each having a thermal power falling within said range of minimum and maximum values and each comprising at least one tubular duct () for the flow of a first heat transfer fluid coiled about a longitudinal axis (X-X) of the helix according to a plurality of coils; c) mounting within said single containment casing () at least one helically-shaped heat exchanger () of the plurality of heat exchangers () of the set; wherein the plurality of heat exchangers () of the set has an internal diameter that is substantially constant as the thermal power of the heat exchanger () varies within the range of thermal power values; and wherein the tubular duct () of the heat exchanger () has a radial extension of the coils proportional to the thermal power of the heat exchanger () and such to maintain substantially constant the axial extension of the heat exchanger () as its thermal power varies and equal to the axial extension of the heat exchanger () having the minimum thermal power within the range of thermal power values of the set.

Method of manufacturing a set of heat exchange cells and set of heat exchange cells thus obtained

The invention relates to a device that includes means for conveying or producing hot gases and a condensing heat exchanger including: an bundle of helical tubes serving as primary exchanger, mounted within a gas-impermeable housing and equipped with a gas discharge trunk, means for circulating a primary fluid in the primary exchanger, two deflector plates and a deflecting ring arranged so as to circulate the hot gasses through the coils of the primary exchanger. Said device is characterized in that it includes a second tube bundle serving as a secondary exchanger, means for circulating therein a secondary fluid separate from the primary fluid and in that the second deflector plate is inserted between the primary exchanger and the secondary exchanger. The invention can be used in the production of heating water and of hot water for sanitation.

Hot fluid production device including a condensing heat exchanger

The invention relates to a gas burner comprising a perforated cylindrical wall used as a combustion surface, a bottom wall and an inlet opening through which a combustible gaseous mixture is fed inside the burner. The stabilisation device consists of a grid () that can be positioned in the inlet opening of the burner, and that comprises a central ring () surrounded by a series of diverting vanes (), the grid being thus configured so as to allow the free passage of the central portion of the flow of gaseous mixture entering the burner through the central ring () while said diverting vanes () generate an eddy movement in the peripheral portion of the flow entering the burner from the outside of the central ring ().

Device and method for stabilizing the pressure and the flow of a gaseous mixture supplied to a surface-combustion cylindrical burner

This exchanger comprises a pair of primary tubular bundles () surrounding a fuel or gas burner (), and a secondary tubular bundle () on which condensation of the steam contained in the burned gases discharged from the primary bundles occurs, wherein the three bundles () are mounted parallel, side-by-side inside a gas-tight casing (), and communicate with one another, with means being provided in order to circulate the water to be heated, between the tubes forming the secondary bundle () and the tubes forming the primary bundles (); the casing () is subdivided at the level of the secondary bundle () by a partition (-) that extends both inside and outside said bundle (), with the arrangement being such that a only a circumferential section of the latter is capable of being contacted and traversed by the hot gases coming from one of the two primary bundles (), and its remaining section being capable of being contacted and traversed only by the hot gases coming from the other primary bundle (). Household or industrial heating installation with high efficiency and low bulk.

Condensation heat exchanger including 2 primary bundles and a secondary bundle

The invention relates to a condensation heat exchanger. The inventive heat exchanger consists of two co-axial helicoidal tube bundles which are positioned end-to-end, one of said bundles () serving as a primary exchanger and the other () serving as a secondary exchanger. Each of the aforementioned bundles comprises a tube and/or a group of flat tubes which are mounted inside a gas-impermeable casing (). Moreover, means are provided to circulate at least one fluid to he heated inside the tubes, the casing () being equipped with a gas exhaust sleeve (). In this way, a first hot gas, known as the main gas, which is, for example, generated by a burner (), passes radially through the voids in the bundles. A deflector system () ensures that said main hot gas first passes through the primary exchanger () from inside outwards and, subsequently, the secondary exchanger () from outside inwards, after which it is discharged from the exchanger through the above-mentioned sleeve (). The deflector () comprises two adjoining parallel plates () which are made from a thermally-insulating material. In this way, a second (additional) hot gas can be introduced between the aforementioned plates in order to heat the fluid circulating in the secondary exchanger or to contribute to the heating thereof. The inventive condensation exchanger is suitable, for example, for domestic use.

Condensation heat exchanger

A condensation heat exchanger adapted to interface with a gas or fuel-oil burner, the condensation heat exchanger including two coaxial tube bundles placed end-to-end, one of which acts as primary exchanger and the other of which acts as secondary exchanger. Each of these bundles include at least one of a tube or of a group of tubes arranged end-to-end, forming a helical coil, in which the wall of the tube(s) is produced from a material that is a good conductor of heat and has a flattened, oval cross section, the major axis of which is perpendicular or approximately perpendicular to the axis of the helix. The width of the gap separating two adjacent turns is constant and smaller than the thickness of the cross section, the bundles being mounted securely inside a gas-impermeable jacket.

Condensation heat exchanger with a gas/air heat collector

The invention concerns a heat exchanger comprising at least one helically bound bundle of tubes, whereof the thermally conductive wall has a flattened and oval cross-section, whereof the main axis is perpendicular to that (X-X') of the helix, while the width of the interstice separating two adjacent turns is small and constant, said bundle being fixedly mounted inside a casing () fitted with a pipe for evacuating gases generated by a burner (), means being provided for circulating cold water inside said bundle, said exchanger being further designed so that the hot gases pass radially through the bundle via the interstices of the turns. Said exchanger is characterized in that the casing is made of heat-resistant plastic material and means are provided for ensuring mechanical containment of the beam in the axial direction, and for damping the thrust loads resulting from the fluid internal pressure, preventing their being transmitted to the casing. The inventive condensation heat exchanger is particularly designed for domestic use and is inexpensive to produce.

Condensation heat exchanger with plastic casing

The invention relates to a heat exchanger comprising a pair of tube bundles () through which the fluid to be heated flows, one primary bundle () surrounding a cylindrical burner () and the other secondary bundle () on which the water steam contained in the combustion gas exhausting from the primary bundle is condensed, whereby the tubes forming the bundles have a flattened section and a helicoidal shape, such that the combustion gas flow between the coils, from the inside to the outside for the primary bundle () and in the reverse order for the secondary bundle (), both bundles being arranged inside a same shell (). Said heat exchanger is characterised in that the axial dimension (l) of the secondary bundle is substantially smaller than the axial dimension (I) of the primary bundle, such that an available space for an exhaust trunking () is provided at the end of said secondary bundle (). The present invention also relates to a gas- or oil-fired boiler, especially for domestic application, with high efficiency, space saving and reduced weight.

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Milan, Italy

Rocco Giannoni