US20110296838A1 - Heat source machine - Google Patents

Heat source machine Download PDF

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Publication number
US20110296838A1
US20110296838A1 US13/151,725 US201113151725A US2011296838A1 US 20110296838 A1 US20110296838 A1 US 20110296838A1 US 201113151725 A US201113151725 A US 201113151725A US 2011296838 A1 US2011296838 A1 US 2011296838A1
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Prior art keywords
heat source
source machine
carbon dioxide
dioxide emission
emission amount
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Abandoned
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US13/151,725
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English (en)
Inventor
Fumio Ogai
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Rinnai Corp
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Rinnai Corp
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Assigned to RINNAI CORPORATION reassignment RINNAI CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: OGAI, FUMIO
Publication of US20110296838A1 publication Critical patent/US20110296838A1/en
Abandoned legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/003—Systems for controlling combustion using detectors sensitive to combustion gas properties
    • 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
    • F24D12/00—Other central heating systems
    • F24D12/02—Other central heating systems having more than one heat source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/40—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H8/00—Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2215/00—Preventing emissions
    • F23J2215/50—Carbon dioxide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2223/00—Signal processing; Details thereof
    • F23N2223/14—Differentiation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2223/00—Signal processing; Details thereof
    • F23N2223/38—Remote control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2241/00—Applications
    • F23N2241/04—Heating water
    • 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
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/04—Gas or oil fired boiler
    • 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
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/04—Gas or oil fired boiler
    • F24D2200/046—Condensing boilers
    • 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
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/08—Electric heater
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/281—Input from user
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/305—Control of valves
    • F24H15/31—Control of valves of valves having only one inlet port and one outlet port, e.g. flow rate regulating valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/355—Control of heat-generating means in heaters
    • F24H15/36—Control of heat-generating means in heaters of burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/395—Information to users, e.g. alarms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/40—Control of fluid heaters characterised by the type of controllers
    • F24H15/414—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based
    • F24H15/421—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/40—Control of fluid heaters characterised by the type of controllers
    • F24H15/414—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based
    • F24H15/45—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based remotely accessible
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/32—Direct CO2 mitigation

Definitions

  • the present invention relates to a heat source machine having a function of displaying a carbon dioxide emission reduction degree.
  • a latent heat recovery-type hot-water supply device which calculates a carbon dioxide emission reduction amount with respect to a reference hot-water supply device (a standard hot-water supply device), and displays information of the carbon dioxide emission reduction amount on a display screen of a remote control (for example, see Japanese Patent Application Laid-Open No. 2004-20150).
  • the hot-water supply device described in the above-mentioned patent document allows a user to recognize to what degree carbon dioxide emissions are reduced with respect to the reference hot-water supply device as a result of replacing with the latent heat recovery-type hot-water supply device.
  • the user replaces a previously used heat source machine with a heat source machine of higher thermal efficiency
  • the user is likely to be interested to know to what degree carbon dioxide emissions are reduced as a result of the replacement of the heat source machine.
  • the above-mentioned conventional heat source machine merely displays the information of the carbon dioxide emission reduction amount in comparison with the uniform reference heat source machine, and so cannot meet the user's interest.
  • the present invention has an object of providing a heat source machine capable of displaying a carbon dioxide emission reduction degree with respect to a previously used heat source machine.
  • the present invention has been made to achieve the stated object, and relates to a heat source machine which performs a heating operation of heating water to be heated by a heating unit.
  • the heat source machine includes: a comparison target input unit which inputs specifications of a reference heat source machine as a comparison target; a first emission amount calculation unit which calculates a first carbon dioxide emission amount, the first carbon dioxide emission amount being an amount of carbon dioxide emitted to obtain energy consumed in the case of performing the heating operation; a second emission amount calculation unit which calculates a second carbon dioxide emission amount, the second carbon dioxide emission amount being an assumed amount of carbon dioxide emitted to obtain energy consumed in the reference heat source machine on an assumption that the reference heat source machine performs the same operation as the heating operation; and a carbon dioxide emission reduction degree display unit which displays a carbon dioxide emission reduction degree that results from changing to the heat source machine, according to a difference between the first carbon dioxide emission amount and the second carbon dioxide emission amount (first invention).
  • a user who replaces a previously used heat source machine or a user who changes his/her residence and as a result uses a heat source machine different from the previously used heat source machine can input specifications of the previously used heat source machine by the comparison target input unit.
  • the carbon dioxide emission reduction degree display unit displays the carbon dioxide emission reduction degree that results from changing to the current heat source machine, with respect to the heat source machine of the specifications input by the comparison target input unit as the reference heat source machine.
  • energy consumed in the case of performing the heating operation is thermal energy generated by burning fuel with a burner in the case where the heat source machine is a gas heat source machine or an oil heat source machine, and thermal energy converted from electric power in the case where the heat source machine is an electric heat source machine such as an electric water heater.
  • Carbon dioxide emitted to obtain energy consumed in the case of performing the heating operation is carbon dioxide emitted when burning fuel with a burner in the case where the heat source machine is a gas heat source machine or an oil heat source machine, and carbon dioxide emitted when generating electric power (such as thermal power generation) in the case where the heat source machine is an electric heat source machine.
  • the carbon dioxide emission reduction degree displayed by the carbon dioxide emission reduction degree display unit includes a reduction amount (absolute quantity) and a reduction proportion (relative quantity) of carbon dioxide emissions with respect to the reference heat source machine.
  • the comparison target input unit is capable of inputting, as the specifications of the reference heat source machine as the comparison target, at least one of an electric water heater, an oil heat source machine, a gas heat source machine using natural gas, and a gas heat source machine using liquefied petroleum gas (second invention).
  • the carbon dioxide emission reduction degree display unit can display the carbon dioxide emission reduction degree with respect to the reference heat source machine that is any of an electric water heater, an oil hot-water supply device, a natural gas hot-water supply device, and an LPG (liquefied petroleum gas) hot-water supply device which are typically used as heat source machines.
  • the reference heat source machine that is any of an electric water heater, an oil hot-water supply device, a natural gas hot-water supply device, and an LPG (liquefied petroleum gas) hot-water supply device which are typically used as heat source machines.
  • the heating unit includes: a burner; a main heat exchanger which mainly absorbs sensible heat from exhaust gas of the burner and performs heat transfer; and an auxiliary heat exchanger which mainly absorbs latent heat from the exhaust gas of the burner and performs heat transfer
  • the comparison target input unit is capable of inputting, as the specifications of the reference heat source machine as the comparison target, a hot-water supply device including only a burner and a heat exchanger which mainly absorbs sensible heat from exhaust gas of the burner and performs heat transfer (third invention).
  • a heat source machine including only a heat exchanger which mainly absorbs sensible heat and performs heat transfer can be input as the reference heat source machine.
  • the carbon dioxide emission reduction degree display unit can then display the carbon dioxide emission reduction degree that results from replacement with a latent heat recovery-type heat source machine including a main heat exchanger which mainly absorbs sensible heat and performs heat transfer and an auxiliary heat exchanger which mainly absorbs latent heat and performs heat transfer.
  • the heating unit includes: a first heating unit which performs a hot-water supply operation of supplying hot water to a hot-water supply pipe, as the heating operation; and a second heating unit which performs a room heating operation of supplying hot water to a room heating circuit, as the heating operation, the first emission amount calculation unit separately calculates the first carbon dioxide emission amount in the case of performing the hot-water supply operation and the first carbon dioxide emission amount in the case of performing the room heating operation, the second emission amount calculation unit separately calculates the second carbon dioxide emission amount in the case of performing the hot-water supply operation and the second carbon dioxide emission amount in the case of performing the room heating operation, and the carbon dioxide emission reduction degree display unit separately calculates and displays the carbon dioxide emission reduction degree that results from changing to the heat source machine in the case of performing the hot-water supply operation and the carbon dioxide emission reduction degree that results from changing to the heat source machine in the case of performing the room heating operation (fourth invention).
  • the carbon dioxide emission reduction degree that results from changing to the current heat source machine in the case of performing the hot-water supply operation and the carbon dioxide emission reduction degree that results from changing to the current heat source machine in the case of performing the room heating operation can be separately recognized by the user.
  • FIG. 1 is a diagram showing a structure of a heat source machine.
  • FIG. 2 is a diagram showing a comparison target selection screen.
  • FIG. 3 is a flowchart of a process of displaying a carbon dioxide emission reduction degree.
  • FIG. 4 is a diagram showing a CO 2 reduction degree display screen 1 .
  • FIG. 5 is a diagram showing a CO 2 reduction degree display screen 2 .
  • a gas heat source machine 1 of this embodiment (corresponding to a heat source machine according to the present invention) is a high-efficiency, latent heat recovery-type heat source machine having a hot-water supply function and a room heating function, and uses natural gas as fuel gas.
  • the gas heat source machine 1 includes: a hot-water supply main heat exchanger 100 a (mainly absorbing sensible heat from exhaust gas of a hot-water supply burner 101 ) and a hot-water supply auxiliary heat exchanger 100 b (mainly absorbing latent heat from the exhaust gas of the hot-water supply burner 101 ) that are provided at some intermediate point of a hot-water supply pipe 105 and heat water to be heated flowing through the hot-water supply pipe 105 ; and a room heating main heat exchanger 110 a (mainly absorbing sensible heat from exhaust gas of a room heating burner 111 ) and a room heating auxiliary heat exchanger 110 b (mainly absorbing latent heat from the exhaust gas of the room heating burner 111 ) that are provided at some intermediate point of a room heating circuit 115 and heat water to be heated flowing through the room heating circuit 115 .
  • a hot-water supply main heat exchanger 100 a mainly absorbing sensible heat from exhaust gas of a hot-water supply burner 101
  • the hot-water supply burner 101 is made up of a large burner 101 a , a medium burner 101 b , and a small burner 101 c
  • the room heating burner 111 is made up of a large burner 111 a and a small burner 111 b.
  • the hot-water supply main heat exchanger 100 a , the hot-water supply auxiliary heat exchanger 100 b , and the hot-water supply burner 101 constitute a first heating unit according to the present invention
  • the room heating main heat exchanger 110 a , the room heating auxiliary heat exchanger 110 b , and the room heating burner 111 constitute a second heating unit according to the present invention.
  • the gas heat source machine 1 includes: a hot-water supply gas solenoid valve 71 which switches on and off of fuel gas supply to the large burner 101 a ; a hot-water supply gas solenoid valve 72 which switches on and off of fuel gas supply to the medium burner 101 b ; a hot-water supply gas solenoid valve 73 which switches on and off of fuel gas supply to the small burner 101 c ; a room heating gas solenoid valve 74 which switches on and off of fuel gas supply to the large burner 111 a ; a room heating gas solenoid valve 75 which switches on and off of fuel gas supply to the small burner 111 b ; a main gas solenoid valve 70 which switches on and off of fuel gas supply to the hot-water supply burner 101 and the room heating burner 111 ; a gas proportional valve 121 which adjusts a fuel gas supply flow rate to the hot-water supply burner 101 and the room heating burner 111 ; and a fan 130 which supplies combustion air to the hot-water supply burner 101 and the room heating burner 111
  • the gas heat source machine 1 further includes a controller 10 which controls the main gas solenoid valve 70 , the gas proportional valve 121 , the hot-water supply gas solenoid valves 71 , 72 , and 73 , the room heating gas solenoid valves 74 and 75 , and the fan 130 , to perform a hot-water supply operation while controlling a temperature of hot water discharged in the hot-water supply pipe 105 and a room heating operation while controlling a temperature of hot water discharged in the room heating circuit 115 .
  • a controller 10 which controls the main gas solenoid valve 70 , the gas proportional valve 121 , the hot-water supply gas solenoid valves 71 , 72 , and 73 , the room heating gas solenoid valves 74 and 75 , and the fan 130 , to perform a hot-water supply operation while controlling a temperature of hot water discharged in the hot-water supply pipe 105 and a room heating operation while controlling a temperature of hot water discharged in the room heating circuit 115 .
  • the controller 10 is an electronic unit composed of a CPU, a memory, and the like not shown.
  • the CPU executes a control program of the gas heat source machine 1 , thereby functioning as a comparison target input unit 11 , a first emission amount calculation unit 12 , a second emission amount calculation unit 13 , and a carbon dioxide emission reduction degree display unit 14 .
  • a remote control 20 for remotely controlling the gas heat source machine 1 is connected to the controller 10 .
  • the comparison target input unit 11 , the first emission amount calculation unit 12 , the second emission amount calculation unit 13 , and the carbon dioxide emission reduction degree display unit 14 are configured to enable a user of the gas heat source machine 1 to display, on a display 30 of the remote control 20 , a carbon dioxide emission reduction degree that results from changing to the gas heat source machine 1 , with respect to another heat source machine used previously.
  • the comparison target input unit 11 displays a comparison target selection screen 50 prompting to select the previously used heat source machine, on the display 30 of the remote control 20 .
  • the user operates an up switch 22 or a down switch 23 , to select specifications of the previously used heat source machine (any one of 1: conventional gas heat source machine (natural gas), 2: conventional gas heat source machine (LPG), 3: oil heat source machine, and 4: electric water heater) on the comparison target selection screen 50 .
  • the previously used heat source machine any one of 1: conventional gas heat source machine (natural gas), 2: conventional gas heat source machine (LPG), 3: oil heat source machine, and 4: electric water heater
  • FIG. 2 shows a state where the oil heat source machine is selected.
  • the conventional gas heat source machine is a gas heat source machine that includes only a heat exchanger for sensible heat recovery and does not include a heat exchanger for latent heat recovery.
  • the heat source machine as the comparison target is determined by the user operating a set switch 24 .
  • thermal energy generated by burning natural gas, LPG (liquefied petroleum gas), or oil with a burner or thermal energy converted from electric power corresponds to energy consumed in the case of performing a heating operation according to the present invention.
  • the following describes processes performed by the first emission amount calculation unit 12 , the second emission amount calculation unit 13 , and the carbon dioxide emission reduction degree display unit 14 when the gas heat source machine 1 performs the hot-water supply operation, with reference to a flowchart shown in FIG. 3 .
  • STEPS 1 to 3 constitute a process performed by the first emission amount calculation unit 12 .
  • the first emission amount calculation unit 12 integrates a consumption amount (output amount) of fuel gas (natural gas) calculated using a water supply temperature, a preset temperature, and a water supply flow amount in the hot-water supply operation of the gas heat source machine 1 (current gas heat source machine), on a day-to-day basis.
  • the first emission amount calculation unit 12 divides an integrated fuel gas amount Gc calculated in STEP 1 by an efficiency conversion value ⁇ 11 given in Table 1 shown below, to calculate an integrated energy amount (input amount) Se used in the hot-water supply operation (corresponding to energy consumed in the case of performing the heating operation according to the present invention).
  • the first emission amount calculation unit 12 calculates Ex1 (first carbon dioxide emission amount) which is an amount of carbon dioxide emitted with burning of natural gas for obtaining the integrated energy amount Se, according to the following Equation (1).
  • Next STEP 4 constitutes a process performed by the second emission amount calculation unit 13 .
  • the second emission amount calculation unit 13 calculates Ex2 (second carbon dioxide emission amount) which is an assumed amount of carbon dioxide emitted with burning of oil on an assumption that the oil heat source machine as the comparison target (reference heat source machine) performs the same hot-water supply operation as the gas heat source machine 1 , according to the following Equation (2).
  • Ex1 is the amount of carbon dioxide emitted with burning of natural gas for obtaining the integrated energy amount Se
  • Step 5 the carbon dioxide emission reduction degree display unit 14 calculates a difference ⁇ Ex between the first carbon dioxide emission amount Ext1 calculated by the first emission amount calculation unit 12 and the second carbon dioxide emission amount Ex2 calculated by the second emission amount calculation unit 13 , as a carbon dioxide emission reduction amount of the gas heat source machine 1 (current heat source machine) with respect to the oil heat source machine (previously used heat source machine, i.e., reference heat source machine).
  • the carbon dioxide emission reduction degree display unit 14 displays a CO 2 reduction degree display screen 60 on the display 30 of the remote control 20 , as shown in FIG. 4 .
  • a carbon dioxide emission reduction amount of the day and a cumulative carbon dioxide emission reduction amount from beginning of use are displayed in a CO 2 reduction amount display portion 61 , and also a value 62 indicating the number of cedar trees equivalent to the cumulative carbon dioxide emission reduction amount and graphics 63 indicating a cedar tree size equivalent to the cumulative carbon dioxide emission reduction amount are displayed.
  • the carbon dioxide emission reduction degree display unit 14 displays, on the display 30 of the remote control 20 , a CO 2 reduction degree display screen 65 that includes a value 66 indicating the number of forests of cedar trees equivalent to the reduction amount and graphics 67 of a forest image, as shown in FIG. 5 .
  • the user who has replaced the conventional oil heat source machine with the high-efficiency latent heat recovery-type gas heat source machine 1 can be satisfied that the replacement contributes to protection of natural environment.
  • the gas heat source machine 1 performs the hot-water supply operation is described in the flowchart of FIG. 3 .
  • the carbon dioxide emission reduction amount that results from the replacement with the gas heat source machine 1 can equally be calculated and displayed on the display 30 of the remote control 20 through the use of the efficiency conversion value ⁇ 12 for the room heating operation in Table 1 shown above and the efficiency conversion value ⁇ 22 for the room heating operation in Table 2 shown above.
  • This embodiment describes an example where the oil heat source machine is selected as the previously used heat source machine.
  • the conventional (not the latent heat recovery type) gas hot-water supply device natural gas or LPG
  • the electric water heater is selected, the carbon dioxide emission reduction amount can equally be calculated and displayed on the display 30 of the remote control 20 through the use of the corresponding CO 2 unit conversion value K2 and the efficiency conversion value ⁇ 21 or ⁇ 22 in Table 2 shown above.
  • the heat source machine as the comparison target is selected from the conventional (not the latent heat recovery type) gas heat source machine (natural gas or LPG), the oil heat source machine, and the electric water heater.
  • the user may input a type name of the heat source machine as the comparison target.
  • the user may further input a type year of the heat source machine as the comparison target so that the setting of the efficiency conversion value is changed according to the type year.
  • This embodiment describes the latent heat recovery-type natural gas heat source machine 1 including the main heat exchangers 100 a and 110 a and the auxiliary heat exchangers 100 b and 110 b , as the heat source machine according to the present invention.
  • the present invention is also applicable to heat source machines of other types.
  • This embodiment describes the composite gas heat source machine 1 which performs the hot-water supply operation and the room heating operation, as the heat source machine according to the present invention.
  • the present invention is also applicable to a heat source machine specifically designed for hot-water supply and a heat source machine specifically designed for room heating.
  • This embodiment describes the case where the carbon dioxide emission reduction degree display unit 14 displays the carbon dioxide emission reduction degree with respect to the reference heat source machine as a reduction amount (absolute value), in the CO 2 reduction degree display screens 60 and 65 .
  • the carbon dioxide emission reduction degree with respect to the reference heat source machine may instead be displayed as a reduction proportion (relative value).
  • the reduction proportion may be calculated using Ext1 in the above-mentioned Equation (1) and Ex2 in the above-mentioned Equation (2), according to the following Equation (3).
US13/151,725 2010-06-07 2011-06-02 Heat source machine Abandoned US20110296838A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010-130310 2010-06-07
JP2010130310A JP5729925B2 (ja) 2010-06-07 2010-06-07 熱源機

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US20110296838A1 true US20110296838A1 (en) 2011-12-08

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US (1) US20110296838A1 (zh)
JP (1) JP5729925B2 (zh)
CN (1) CN102269422B (zh)
AU (1) AU2011202528B2 (zh)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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