EP3346198A1 - Heizsystem mit strahlenden streifen - Google Patents

Heizsystem mit strahlenden streifen Download PDF

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Publication number
EP3346198A1
EP3346198A1 EP17207170.6A EP17207170A EP3346198A1 EP 3346198 A1 EP3346198 A1 EP 3346198A1 EP 17207170 A EP17207170 A EP 17207170A EP 3346198 A1 EP3346198 A1 EP 3346198A1
Authority
EP
European Patent Office
Prior art keywords
burner
heating system
air
combustion
section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP17207170.6A
Other languages
English (en)
French (fr)
Other versions
EP3346198B1 (de
Inventor
Gastone Martorel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Carlieuklima Srl
Original Assignee
Carlieuklima SRL/systema SPA/ Impresind Srl
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Carlieuklima SRL/systema SPA/ Impresind Srl filed Critical Carlieuklima SRL/systema SPA/ Impresind Srl
Priority to PL17207170T priority Critical patent/PL3346198T3/pl
Publication of EP3346198A1 publication Critical patent/EP3346198A1/de
Application granted granted Critical
Publication of EP3346198B1 publication Critical patent/EP3346198B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/12—Radiant burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D5/00—Hot-air central heating systems; Exhaust gas central heating systems
    • F24D5/06—Hot-air central heating systems; Exhaust gas central heating systems operating without discharge of hot air into the space or area to be heated
    • F24D5/08—Hot-air central heating systems; Exhaust gas central heating systems operating without discharge of hot air into the space or area to be heated with hot air led through radiators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C3/00—Combustion apparatus characterised by the shape of the combustion chamber
    • F23C3/002—Combustion apparatus characterised by the shape of the combustion chamber the chamber having an elongated tubular form, e.g. for a radiant tube
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/12—Radiant burners
    • F23D14/14—Radiant burners using screens or perforated plates
    • F23D14/145—Radiant burners using screens or perforated plates combustion being stabilised at a screen or a perforated plate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/60—Devices for simultaneous control of gas and combustion air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L3/00—Arrangements of valves or dampers before the fire
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L5/00—Blast-producing apparatus before the fire
    • F23L5/02—Arrangements of fans or blowers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00—Hot-water central heating systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2202/00—Fluegas recirculation
    • F23C2202/10—Premixing fluegas with fuel and combustion air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2233/00—Ventilators
    • F23N2233/06—Ventilators at the air intake
    • F23N2233/08—Ventilators at the air intake with variable speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/02—Air or combustion gas valves or dampers
    • F23N2235/06—Air or combustion gas valves or dampers at the air intake
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves

Definitions

  • the present invention refers to a heating system with radiant strips, according to the preamble of the main independent claim No. 1.
  • the present system is intended to be employed in order to heat settings, generally of large size and in general of buildings, and more particularly of industrial and commercial buildings, such as sheds, warehouses, hangars, supermarkets, shopping malls or other buildings.
  • the system according to the invention is therefore inserted in the heat technology field, or in the technical field of production of heating systems.
  • Heating systems with radiant strips have been known and used for some time, especially in industry.
  • Such systems comprise one or more closed-loop radiant pipes adapted to be fixed to the ceiling or to a wall of a room that one wishes to heat and susceptible of being internally traversed by a heated carrier fluid constituted by exhaust gases as better explained hereinbelow, in order to heat the surrounding environment mainly by radiation.
  • the radiant strips are constituted by metal piping, generally made of aluminized steel, which are extended into the room to be heated with a length of several tens of meters, i.e. up to even 100-150 meters.
  • the radiant strip forms a closed loop defined by a delivery pipe and by a return pipe, connected to each other at the respective ends in order to obtain the closure of the loop and allow the recirculation of the carrier fluid at their interior, which in particular is constituted by exhaust gases.
  • the system also comprises a burner inserted in a combustion chamber, which can be partially housed inside an initial section of the delivery pipe of the radiant strip.
  • the burner is connected to first means for supplying fuel, in particular pressurized gas, and second means for supplying a comburent, in particular air for obtaining a mixture in the burner that produces a combustion reaction and produces hot fumes that are directly introduced into the loop of the radiant strip, heating the carrier fluid that flows therein and in turn constituted by previously-burned exhaust gas.
  • the system also comprises a ventilator operating in a suction fashion, which is arranged at the terminal section of the return pipe of the radiant strip, in proximity to the burner.
  • a ventilator operating in a suction fashion, which is arranged at the terminal section of the return pipe of the radiant strip, in proximity to the burner.
  • the latter is in particular of the type at atmospheric pressure with multiflame Venturi tubes.
  • the ventilator of the system described herein is adapted to suction the carrier fluid which traverses the delivery pipe and the return pipe of the radiant strip and to insufflate part of such carrier fluid laterally with respect to the burner in order to allow the recirculation thereof.
  • a fumes expulsion flue is also provided, preferably connected to the closed loop of the radiant strip at the connector close to the ventilator and to the burner, which expels that head part of the circulation carrier fluid which is substituted by new exhaust gases created in the burner.
  • the systems with radiant strips have a box-like containment body in which the following are housed: the burner with its combustion chamber, the ventilator for the circulation of the exhaust gases, the means for injecting air and gas into the combustion chamber and the connector between the delivery pipe and the return pipe with the derivation for the expulsion flue.
  • the box-like containment body of the system is positioned in an external environment with respect to the environment to be heated.
  • the systems with radiant strips employ two types of burners, i.e. suction air burners and blown air burners.
  • the air is suctioned in a natural manner by the fuel due to a duct that has a section narrowing at the tip in which the fuel is introduced.
  • the comburent air coming from the external environment is generally suctioned into the burner due to the depression created by the pressurized jets of fuel gas within the burner and due to the depression created by the ventilator on the delivery pipe of the radiant strip associated with the burner.
  • the second means for supplying air comprise a chamber, communicating with the combustion chamber and with the external environment, through which the comburent air coming from the external environment is suctioned into the burner.
  • the blown air burners provide that the air is introduced into the burner in a forced manner, due to a ventilator placed upstream of the burner.
  • the burner is in this case supplied with a mixture of fuel and comburent air which are mixed together at the nozzle of introduction into the burner; air and gas therefore reach the burner itself already mixed.
  • the flame generated by such blown air burner is rather short, being extended over a limited volume.
  • a first drawback lies in the fact that the exhaust gases expelled through the flue contain a high quantity of pollutants and in particular a high percentage of NOx.
  • a second drawback lies in the fact that the mixture of gas and comburent air is not optimized for the different powers that the burner may be requested to deliver, with the result that the system has poor thermal efficiency.
  • the known systems of the abovementioned type are equipped with a high power ventilator, capable of ensuring the creation within the delivery pipe of the radiant strip of a depression sufficient for ensuring the suction of sufficient quantities of comburent air.
  • a high power ventilator capable of ensuring the creation within the delivery pipe of the radiant strip of a depression sufficient for ensuring the suction of sufficient quantities of comburent air.
  • the systems with radiant strips of known type which have a blown air burner have the main drawback of requiring high production costs, since they must be equipped with a combustion chamber provided with optimal characteristics of resistance to thermal shock, to which the chamber itself is necessarily subjected during the operation of the system, and since they must be provided with a high power ventilator adapted to generate the necessary turbulence for ensuring the complete mixing of the fuel and of the comburent air which are sent to the head of the burner.
  • both the systems with radiant strips with suction air burner and those with blown air burner have, in the combustion unit, considerable thermal dispersions with heat which in part is dispersed in the external environment, where such unit is often situated, and which in part involves arranging heat insulation in order to prevent ruining the electronics, the valves and the other components for supplying the burner, which are housed within the same unit in a chamber alongside the burner.
  • both the systems with radiant strips with suction air burner and those with blown air burner generally have a single or double stage operation of the power, or with only one gas-side modulation since the application of a continuous and combined (air and gas) modulation of such burners is costly.
  • premix burners have been introduced in the market which provide for a complete mixing of the comburent air and of the fuel gas in a ventilator that supplies the combustion head.
  • Such burners allow considerably reducing the NOx inflow, yet up to now they have not found application in the field of systems with radiant strips, since the high powers required by such systems would require a high volume - in which the flame is distributed and the heat is exchanged - which is incompatible with the normal size of the radiant strips.
  • the combustion chamber and the delivery pipe that encloses it would be subjected to excessively high temperatures which would compromise the mechanical strength thereof, also in rather limited time periods.
  • the object of the present invention is to overcome the drawbacks of the abovementioned prior art, by providing a heating system with radiant strips which is able to drastically reduce the inflow of noxious gases, in particular the percentage of NOx with respect to the current systems with radiant strips.
  • a further object of the present invention is to provide a heating system with radiant strips, which is able to modulate the power delivered in a very extensive manner in accordance with the actual user requirements and in very brief time periods.
  • a further object of the present invention is to provide a heating system with radiant strips, which is safe and entirely reliable in operation.
  • a further object of the present invention is to provide a heating system with radiant strips, which is simple and inexpensive to obtain.
  • Another object of the present invention is to provide a heating system with radiant strips, which requires simple and inexpensive maintenance.
  • a further object of the present invention is to provide a heating system with radiant strips, which has low gas and electricity consumptions and therefore low operating costs.
  • reference number 1 indicates the heating system with radiant strips, object of the present invention.
  • the heating system 1, according to the invention is intended to be employed for heating large-cubature settings, i.e. characterized by large surfaces and high heights, usually in industrial or commercial buildings, such as sheds, hangers, warehouses, supermarkets, shopping malls, cinemas or the like.
  • system 1 is intended to be installed in the room that one wishes to heat at a distance from the ground and with an orientation that are suitably selected for ensuring the desired heating of a selected zone of the room.
  • the heating system 1, object of the present invention comprises a loop of radiant strips 2, susceptible to be fixed to the ceiling or to a wall of a room to be heated, maintained suspended and spaced from the ground of the room itself, and adapted to be internally traversed by a carrier fluid F, in order to heat the room itself by radiation.
  • the radiant strips 2 of the system rather than being fixed directly to the ceiling or to a wall, can also be fixed to beams or to columns or to poles associated therewith or to any structure susceptible to safely support the radiant strips 2 themselves and hence the system 1, without departing from the protective scope defined by the present patent.
  • the aforesaid radiant strips 2 are formed by metal pipes which are extended with a length of several tens of meters and in particular even up to 100-150 meters.
  • the aforesaid metal pipes are obtained starting from a continuous strip of metal material, e.g. of aluminized steel, which is formed as a spiral and fixed along the longitudinal edges thereof so as to make a tubular body, according to production processes that are per se known to the man skilled in the art of the field.
  • a continuous strip of metal material e.g. of aluminized steel, which is formed as a spiral and fixed along the longitudinal edges thereof so as to make a tubular body, according to production processes that are per se known to the man skilled in the art of the field.
  • the system 1 illustrated in the enclosed figures and described in detail hereinbelow comprises a delivery pipe 2' and a return pipe 2", connected together at the respective ends in order to define a closed loop and to allow the circulation of the carrier fluid F at its interior.
  • the system 1 can comprise multiple radiant strips 2 without departing from the protective scope defined by the present patent.
  • the heating system 1 comprises a containment structure 3, preferably of box-like shape and metallic, e.g. made of steel, advantageously positioned in an external environment with respect to the setting to be heated, where instead the radiant strips 2 are placed.
  • a recirculation duct 4 is housed which places an initial section 3' and a final section 3" of the loop of radiant strips 2 in mutual connection, and more precisely the initial section 3' of the delivery pipe 2' and the final section 3" of the return pipe 2" of the loop with radiant strips 2.
  • the two delivery and return pipes 2', 2" lead, with one end thereof, to the containment structure 3 while at the other end they are preferably connected, in a per se conventional manner, with a 180-degree connector or connector which has U-shaped form, or with multiple connectors with various extension, not illustrated in the enclosed figures since they are well-known to the man skilled in the art.
  • the system 1 therefore comprises a burner 5 housed in the containment structure 3 and provided with a combustion chamber 6 delimited by a cylindrical wall 7, which is extended passing into the recirculation duct 4, for a first section 7', in which it is externally touched by the carrier fluid F and for a second section 7" with which it continues into the loop of radiant strips 2 starting from the initial section 3' of the delivery pipe 2'.
  • the burner 5 also comprises, in a per se conventional manner, means 8 for supplying a fuel mixture, connected to the combustion chamber 6, in which the combustion of the fuel mixture takes place as well as the consequent generation of combustion products P susceptible of heating the carrier fluid F by mixing with it at the outlet of the combustion chamber 6.
  • a ventilator 9 is housed which is provided with a fan 10 inserted in the recirculation duct 4 and operating in a suction fashion to force the carrier fluid F into the loop of radiant strips 2, from the final section 2B to the initial section 2A.
  • the fuel is advantageously in gaseous form and is constituted for example by methane or can be in liquefied form, and be for example constituted by LPG.
  • the burner 5 is of premix type and comprises a cylindrical combustion head 12, which is provided with a metal mesh 13, on which the combustion occurs.
  • the cylindrical combustion head 12 is extended into the combustion chamber 6 advantageously for at least the first section 7' of its wall 7, so as to uniformly heat it from the interior along its extension, which is externally and uniformly touched and cooled by the carrier fluid F which comes from the recirculation duct 4.
  • the supply means 8 for the burner 5 comprise a modulating blower 14, which is driven by a variable speed motor (advantageously of brushless type), in order to suction an adjustable air flow, and a controlled valve 15, i.e. with proportional opening for the gas, which is connected on one side to a source of supply gas, and on the other side to the inlet of the modulating blower 14 in order to introduce a gas flow therein.
  • a modulating blower 14 which is driven by a variable speed motor (advantageously of brushless type), in order to suction an adjustable air flow
  • a controlled valve 15 i.e. with proportional opening for the gas
  • the supply means 8 for the burner draw a gas flow from the gas source through the controlled valve 15, as a function of the air suctioned by the modulating blower 14.
  • the air flow and the gas flow are then closely mixed together within the modulating blower 14 in order to then be injected in mixture form in the combustion head 12, making a flame, advantageously radial, on its cylindrical mesh 13.
  • the controlled valve 15 is controlled to open and close, in an advantageously proportional manner, directly by the flow of air suctioned by the modulating blower 14 by means of control means.
  • Such control means can be pneumatic, mechanical or electronic.
  • the controlled valve 15 can for such purpose have a proportional opening with pneumatic control, by receiving a pressure signal from the treated air flow or from the suction of the modulating blower 14.
  • the controlled valve can be mechanically controlled by a progressive actuation, which responds in a variable manner to the flow rate of air suctioned by the controlled valve.
  • control means - for making the opening of the valve 15 of the gas dependent on the flow rate of an air flow fed by the blower 14 - are well-known to the man skilled in the art of the field, are schematized in figure 5 and do not require further details due to the easy manufacture thereof.
  • An electronic control unit can likewise be provided which will control the speed of the modulating blower 14, for example as a function of the heat required by the users, and which will electronically detect the capacity of the modulating blower 14 in order to consequently adjust the valve 15, also possibly providing for optimizing the combustion parameters through the assumption of different parameters such as temperature, humidity or emissions at the flue 11.
  • the performances of a premix burner 5 in a heating system with radiant strips 1 are synergistically exploited, by providing for cooling the combustion chamber 6 - which otherwise would reach unacceptable temperatures in a configuration with radiant strips - through the recirculation flow of the coldest gases of the carrier F externally over the entire first section 7' of the wall 7 of the combustion chamber 6, which is correspondingly internally heated also by radiation from the cylindrical combustion head 12 of the burner 5.
  • the heating of the wall 7 of the combustion chamber also occurs by radiation by the metal mesh 13 of the cylindrical combustion head 12 of the burner 5, on which the combustion occurs.
  • the flame on the mesh is very compact and preferably radial, and thus allows the mesh to radiate heat towards the wall 7.
  • the cylindrical combustion head 12 of the premix burner 5 is extended into the combustion chamber 6, going beyond its first section, traversing the initial section 2A of the loop of radiant strips 2 for a length L shorter than the second section 7", with which the combustion chamber 6 is extended into the delivery pipe 2'.
  • a jacket 16 is provided, externally arranged with respect to the recirculation duct 4, with which it defines an interspace 17.
  • the latter is in communication with the external environment by means of a first opening 18 and is in communication with the suction of the modulating blower by means of a first supply duct 19.
  • the air suctioned by the modulating blower 14, through the first supply duct 19 and the interspace 17, is heated in contact with the recirculation duct 4, removing heat from the carrier fluid F so as to supply the modulating blower 14 with pre-heated air.
  • the air supply duct 19 comprises a chamber 20, which is provided with a wall 21 that separates it from the recirculation duct 4 and in which a second opening 22 is provided for the passage of a fraction F' of the flow of the carrier fluid F.
  • the wall 21 is also provided with a third opening 25 in order to place the chamber 20 in communication with the interspace 17.
  • Such fraction F' of the flow of the carrier fluid F is constituted by exhaust gases, the exhaust gases having previously exited from the burner 6 hence with a much lower oxygen level than that of the external air.
  • the fraction F' of the flow of the carrier fluid F is therefore mixed in the chamber 20 with the ambient air coming from the first opening 18, further heating it and forming a mixture of air with oxygen level lower than that of the ambient air, and which supplies the modulating blower 14.
  • the low-oxygen mixture allows further reducing the NOx generated in the combustion on the head 12 and subsequently emitted by the flue 11.
  • the fraction F' of the flow of the carrier fluid F is selected in a manner such that the mixture directed towards the modulating blower 14 has an oxygen percentage on the order of 15-18% rather than about 20.9% which external air would normally have.
  • the two abovementioned openings i.e. the first opening 18 for the inlet of the ambient air and the second opening 22 for the inlet of the fraction F' of the flow of the carrier fluid F, can be adjusted by a gate valve (not illustrated) for reducing the passage of the ambient air and/or of the fraction F' of the flow of the carrier fluid F into the comburent fluid.
  • the system 1 also comprises a heat exchanger 26, which is associated with the flue 11 and receives the air from the external environment through at least one opening 27.
  • the air that enters into the exchanger 26 exchanges heat with the discharge fumes of the flue 11, being heated in order to supply the modulating blower 14 with pre-heated air through a second air supply duct 28. Due to the exchanger 26, the discharge fumes of the flue 11 are cooled, expelling colder fumes into the atmosphere with considerable energy savings, advantageously at a temperature lower than that of condensation for the recovery of the latent heat and hence of a considerably quantity of heat.
  • the pre-heated air exiting from the exchanger 26 is directed, by means of the second air supply duct 28, into the above-considered interspace 17, which encloses, or at least partly touches, the recirculation duct 4, and is in communication with the suction of the modulating blower 14 by means of the first supply duct 19.
  • first air supply duct 19 can also in this case comprise the chamber 20 which receives, from the second opening 22, a fraction F' of the flow of the carrier fluid F.
  • the containment structure 3 comprises a technical compartment 24, in which the ventilator 9 (or its motor) and the supply means 8 for the burner 5 are housed.
  • Such technical compartment 24 is separated from the recirculation duct 4 by a partitioning wall 23 which, if the drawing of the fraction F' of the carrier fluid F flow is provided, is partly defined by a wall of the chamber 20.
  • the cooling of the recirculation duct 4 through the air that traverses the interspace 17 allows decreasing or even eliminating the otherwise necessary insulation that separates it from the contiguous technical compartment 24, which is at a sufficiently low temperature for containing the ventilator 9 and the supply means 8 without ruining them.
  • the fuel and the comburent are mixed before combustion.
  • Such technical solution allows very extensively modulating the delivered power, allowing an improved operating efficiency since the capacity to modulate the power and hence the heat supply allows satisfying the actual present needs of the users, reducing the turning on/off actions that are necessary with the burners that do not allow considerable modulation and which operate with insufficient or excessive power.
  • the modulation of the flame of this burner allows varying the temperature of the fumes and hence of the carrier fluid as a function of the external temperature in order to optimize the performances.
  • the flame of this burner assumes a compact geometry that maintains limited noise, which therefore also involves limited acoustic emission at the flue, with important advantages with regard to comfort.
  • the finding thus conceived therefore attains the preset objects.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Gas Burners (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Basic Packing Technique (AREA)
  • Combustion Of Fluid Fuel (AREA)
  • Air-Conditioning For Vehicles (AREA)
EP17207170.6A 2016-12-14 2017-12-13 Heizsystem mit strahlenden streifen Active EP3346198B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL17207170T PL3346198T3 (pl) 2016-12-14 2017-12-13 System grzewczy z listwami grzejnymi promiennikowymi

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102016000126485A IT201600126485A1 (it) 2016-12-14 2016-12-14 Impianto di riscaldamento a nastri radianti

Publications (2)

Publication Number Publication Date
EP3346198A1 true EP3346198A1 (de) 2018-07-11
EP3346198B1 EP3346198B1 (de) 2019-08-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP17207170.6A Active EP3346198B1 (de) 2016-12-14 2017-12-13 Heizsystem mit strahlenden streifen

Country Status (6)

Country Link
EP (1) EP3346198B1 (de)
CN (1) CN108224424A (de)
HU (1) HUE046039T2 (de)
IT (1) IT201600126485A1 (de)
PL (1) PL3346198T3 (de)
RU (1) RU2749629C2 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202000003224A1 (it) * 2020-02-18 2021-08-18 Carlieuklima S R L Apparecchiatura per la formazione di una barriera d’aria
GB2607411A (en) * 2021-03-23 2022-12-07 Impresind S R L Radiant strip heating device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0248629A2 (de) * 1986-06-04 1987-12-09 Ambi-Rad Limited Raumheizgerät
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RU2749629C2 (ru) 2021-06-16
EP3346198B1 (de) 2019-08-07
RU2017143617A3 (de) 2021-04-14
RU2017143617A (ru) 2019-06-13
IT201600126485A1 (it) 2018-06-14
CN108224424A (zh) 2018-06-29
PL3346198T3 (pl) 2020-03-31

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