Tube for a heat exchanger with an at least partially variable cross-section, and heat exchanger equipped therewith
AssigneeIntergas Heating Assets B.V.
InventorHarm Bosscher
Life of this patent
Estimating the term…
Abstract
The present invention relates to a tube for a heat exchanger, wherein at least a part of the tube has a variable cross-section in longitudinal direction, wherein a cross-sectional area decreases from a maximum value close to an outer end of the tube to a minimum value close to an opposite outer end thereof. The invention further relates to a heat exchanger provided with at least one such tube and to a central heating installation and a tap water system comprising such a heat exchanger.
Claims16
A heat exchanger comprising at least one tube for a first medium comprising flue gasses, which at least one tube is in heat-exchanging contact with a second medium flowing therealong, the second medium to be heated by the flue gasses and comprising tap water, wherein at least a part of the tube has a cross-section that varies in a substantially linear manner in a longitudinal direction, and wherein a cross-sectional area decreases from a maximum value proximate a heating burner end of the tube to a minimum value proximate a flue gas exit end thereof,
- wherein a heating burner is positioned at a top of the heat exchanger,
- wherein the at least one tube is received in a housing in which the second medium flows,
- wherein the housing has an inflow opening for the second medium formed in or proximate a first side and an outflow opening for the second medium formed in or proximate a second side, and a number of tubes are arranged substantially parallel in the housing and enclose an angle with a line which mutually connects the inflow opening and the outflow opening;
- and
- wherein the housing with the inflow opening and outflow opening forms part of a tap water conduit and the tubes form part of a flue duct of the heating burner.
A central heating installation, comprising a heating burner, a circuit which extends along one or more spaces and in which a medium circulates, and a heat exchanger provided with at least one tube for a first medium comprising flue gasses, which at least one tube is in heat-exchanging contact with a second medium flowing therealong, the second medium to be heated by the flue gasses and comprising tap water, wherein at least a part of the tube has a cross-section that varies in a substantially linear manner in a longitudinal direction, and wherein a cross-sectional area decreases from a maximum value proximate to a heating burner end of the tube to a minimum value proximate a flue gas exit end thereof,
- wherein the heating burner is positioned at a top of the heat exchanger,
- wherein the at least one tube is received in a housing in which the second medium flows,
- wherein the housing has an inflow opening for the second medium formed in or proximate a first side and an outflow opening for the second medium formed in or proximate a second side, and a number of tubes are arranged substantially parallel in the housing and enclose an angle with a line which mutually connects the inflow opening and the outflow opening;
- and
- wherein the housing with the inflow opening and outflow opening forms part of a tap water conduit and the tubes form part of a flue duct of the heating burner,
- wherein the heat exchanger mutually connects the burner and the circuit.
A tap water system, comprising a heating burner, a water conduit extending from a water source to a draw-off point, and a heat exchanger provided with at least one tube for a first medium comprising flue gasses, which at least one tube is in heat-exchanging contact with a second medium flowing therealong, the second medium to be heated by the flue gasses and comprising tap water, wherein at least a part of the tube has a cross-section that varies in a substantially linear manner in a longitudinal direction, and wherein a cross-sectional area decreases from a maximum value proximate a burner end of the tube to a minimum value proximate a flue gas exit end thereof,
- wherein the heating burner is positioned at a top of the heat exchanger,
- wherein the at least one tube is received in a housing in which the second medium flows,
- wherein the housing has an inflow opening for the second medium formed in or proximate a first side and an outflow opening for the second medium formed in or proximate a second side, and a number of tubes are arranged substantially parallel in the housing and enclose an angle with a line which mutually connects the inflow opening and the outflow opening;
- and
- wherein the housing with the inflow opening and outflow opening forms part of a tap water conduit and the tubes form part of a flue duct of the heating burner,
- wherein the heat exchanger mutually connects the burner and the water conduit.
Dependencies are inferred from the claim text.