JP2009047052A - Co-generation apparatus - Google Patents

Co-generation apparatus Download PDF

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Publication number
JP2009047052A
JP2009047052A JP2007212977A JP2007212977A JP2009047052A JP 2009047052 A JP2009047052 A JP 2009047052A JP 2007212977 A JP2007212977 A JP 2007212977A JP 2007212977 A JP2007212977 A JP 2007212977A JP 2009047052 A JP2009047052 A JP 2009047052A
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JP
Japan
Prior art keywords
heater
generator
cooling water
oil tank
internal combustion
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.)
Pending
Application number
JP2007212977A
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Japanese (ja)
Inventor
Nobuyuki Yuri
信行 由利
Original Assignee
Honda Motor Co Ltd
本田技研工業株式会社
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Application filed by Honda Motor Co Ltd, 本田技研工業株式会社 filed Critical Honda Motor Co Ltd
Priority to JP2007212977A priority Critical patent/JP2009047052A/en
Publication of JP2009047052A publication Critical patent/JP2009047052A/en
Application status is Pending legal-status Critical

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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/10Combined combustion
    • Y02E20/14Combined heat and power generation [CHP]
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/16Energy recuperation from low temperature heat sources of the ICE to produce additional power
    • Y02T10/166Waste heat recovering cycles or thermoelectric systems

Abstract

<P>PROBLEM TO BE SOLVED: To provide a co-generation apparatus configured to enhance energy-saving efficiency and to have capability to adapt load fluctuations by energizing a heater using surplus power generated in a generator thus creating warm water, as well as to prevent a deterioration of the heater as far as possible. <P>SOLUTION: The co-generation apparatus includes at least a heater 40 that generates heat when connected to a generator (stator/generator) 20, more specifically connected via an inverter unit 30, and energized, and an oil tank 22n that stores lubricating oil EO of an internal combustion engine (engine) 22, and causes cooling water of a cooling water passage 36 and the lubricating oil EO is subjected to a heat exchange. The heater 40 is arranged in the oil tank 22n, more specifically arranged in the inside thereof. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cogeneration apparatus, and more specifically to an arrangement of a heater that is energized with surplus power.

In recent years, a generator driven by an internal combustion engine is connected to an AC power supply path from a commercial power system to an electric load to supply power to the electric load in conjunction with the commercial power system, and exhaust heat from the internal combustion engine. A so-called cogeneration apparatus has been proposed in which warm water or the like warmed by using a heat source is supplied to a heat load. As an example, a technique described in Patent Document 1 can be cited.
JP-A-8-4586

  In the technique described in Patent Document 1, when surplus power is generated, the heater disposed in the hot water tank is energized to warm the hot water, that is, the surplus electricity generated by the generator is stored as thermal energy. In addition to improving energy efficiency, the stored heat energy can be used when the heat load increases, thereby improving the ability to cope with load fluctuations.

  In the above-described prior art, warm water is heated by energizing the heater. However, since the boiling point of water is slightly over 100 ° C., the heater energizes and the surface of the heater is eroded and the heater may be deteriorated.

  Therefore, the object of the present invention is to solve the above-mentioned problems, and to improve the energy saving efficiency and the ability to cope with load fluctuations by energizing the heater with surplus power generated in the generator to generate hot water, as well as deterioration of the heater It is an object of the present invention to provide a cogeneration apparatus that can prevent the occurrence of the problem as much as possible.

  In order to solve the above-mentioned problem, in claim 1, a power generation unit comprising a generator connectable to a power supply path of AC power from a commercial power system to an electric load and an internal combustion engine that drives the generator In a cogeneration apparatus that guides the cooling water of the internal combustion engine to a cooling water passage, heats it with exhaust heat of the internal combustion engine to generate hot water, and supplies it to a heat load, connected to the generator, A heater that generates heat when energized, and an oil tank that stores lubricating oil of the internal combustion engine and that exchanges heat between the cooling water in the cooling water passage and the lubricating oil, and the heater in the oil tank It was configured to be arranged.

  In the cogeneration apparatus according to a second aspect, the heater is arranged inside the oil tank.

  In the cogeneration apparatus according to a third aspect, the heater is embedded in the tank wall of the oil tank.

  In the cogeneration apparatus according to claim 1, the heater connected to the generator and generating heat when energized stores the lubricating oil of the internal combustion engine and heats the cooling water and the lubricating oil in the cooling water passage. Since it is configured to be arranged in the oil tank to be replaced, when surplus power is generated in the generator, the heater is energized to generate hot water and supply it to the heat load, thereby improving the energy saving efficiency and the ability to cope with load fluctuations At the same time, the heater can be prevented from being deteriorated as much as possible.

  That is, since the boiling point of the lubricating oil in the internal combustion engine is 300 ° C., it is difficult to raise the temperature of the lubricating oil to that temperature by energizing the heater, and therefore the heater is not easily deteriorated due to surface erosion. It can be prevented as much as possible.

  Moreover, by arranging in the oil tank, it is possible to reduce the installation space of the heater and to divert the warm-up at the time of cold start of the internal combustion engine. Moreover, when it is set as the structure which unitizes an internal combustion engine and a generator and accommodates in a power generation unit case, it can also be diverted for the freezing countermeasure at the time of cold.

  In the cogeneration apparatus according to claim 2, since the heater is configured to be disposed inside the oil tank, in addition to the effects described above, the heater is submerged in the lubricating oil, so that the temperature rise efficiency can be increased. This can improve the energy efficiency.

  In the cogeneration apparatus according to the third aspect, since the heater is configured to be embedded in the tank wall of the oil tank, in addition to the above-described effects, the temperature raising efficiency can be increased substantially in the same manner, and the energy saving efficiency can be increased. Can be further improved, and the heater does not need to be sealed because it is not immersed in the lubricating oil.

  The best mode for carrying out a cogeneration apparatus according to the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a block diagram generally showing a cogeneration apparatus according to a first embodiment of the present invention.

  As shown in the figure, a cogeneration apparatus (denoted by reference numeral 10) includes a generator 20 that can be connected to an AC power supply path (power line) 16 from a commercial power source (commercial power system) 12 to an electric load 14, and a generator 20 A power generation unit 24 including an internal combustion engine 22 for driving the engine. The commercial power supply 12 outputs AC power of 50 Hz (or 60 Hz) at 100/200 V AC from a single-phase three-wire.

  The power generation unit 24 is integrated and accommodated in a power generation unit case (housing) 26. In addition, the cogeneration apparatus 10 is comprised correctly from the electric power generation unit 24 and the exhaust-heat utilization hot-water supply heating unit (thermal load. Not shown).

  Hereinafter, each element constituting the power generation unit 24 will be described. The internal combustion engine (hereinafter referred to as “engine”) 22 is a water-cooled four-cycle single-cylinder OHV type spark ignition type fueled by city gas (or LP gas). An engine, for example, having a displacement of 163 cc.

  FIG. 2 is an explanatory view schematically showing the structure of the engine 22 shown in FIG. 1, but the position when the engine 22 is housed in the power generation unit case 26 and the power generation unit case 26 is installed at a place of use such as a home. Based on the relationship, the cylinder head 22a and the cylinder block 22b of the engine 22 are arranged in a horizontal direction (lateral direction), and a single piston (not shown) reciprocates therein. A crankshaft (not shown) arranged in the vertical direction (longitudinal direction) is connected to the piston.

  A flywheel (not shown) is attached to the upper end of the crankshaft, and a generator 20 composed of a multi-pole coil is disposed inside the crankshaft, and generates AC power when rotating relative to the flywheel. . Since the generator 20 also functions as a starter motor for cranking the engine 22 when energized, it is indicated as “starter / generator” in the figure.

  In the engine 22, air (intake air) enters the mixer 22e through the intake silencer 22c and the air cleaner 22d. Gas is supplied to the mixer 22e from a supply source through the gas proportional valve unit 22f, and is mixed with air there. In the gas box including the mixer 22e and the gas proportional valve unit 22f, the mixer 22e includes a throttle valve driven by an electric motor and a variable jet.

  The air-fuel mixture generated by the mixer 22e flows into a combustion chamber (not shown), and combusts when ignited by an ignition system composed of an ignition coil 22g and a spark plug 22h. Thus, the generated exhaust gas is discharged out of the power generation unit case 26 (outside the warehouse) through the exhaust pipe 22k and the exhaust muffler 22m.

  As shown in FIG. 2, an oil tank (oil pan) 22n is formed below the cylinder block 22b of the engine 22 (the crankcase is not shown), and the lubricating oil EO of the engine 22 is stored therein. Lubricating oil EO is scraped up by a gear pump (not shown) and lubricates sliding parts such as pistons, then falls along a connecting rod (not shown) and a cylinder wall surface, and is stored in an oil tank 22n. Similar to the crankcase, the oil tank 22n is partitioned by a tank wall 22n1 made of a metal material such as cast iron.

  The output of the generator (starter / generator) 20 is sent to the inverter unit 30. The inverter unit 30 converts the output of the generator 20 into AC100 / 200V (single phase) via a DC-DC converter. The inverter unit 30 constitutes a control unit together with an electronic control unit (Electronic Control Unit; hereinafter referred to as “ECU”) 32 composed of a microcomputer, and switches the function of the generator 20 between the starter and the generator in response to an instruction from the ECU 32. .

  The output of the inverter unit 30 is sent to the indoor switchboard 34, where it can be connected to the AC power supply path 16 from the commercial power supply 12 to the electric load 14. The power generation output of the power generation unit 26 is about 1.0 kW.

  Reference numeral 36 denotes a passage of cooling water made of antifreeze that cools the engine 22. The cooling water passage 36 passes through the cylinder block 22b and the oil tank 22n of the engine 22 and is connected to an external waste heat utilization hot water supply / heating unit (thermal load, not shown).

  That is, as shown in FIG. 1, the low-temperature cooling water sent from the hot water supply / heating unit is guided to the inlet side 36a of the cooling water passage 36 and exchanges heat with the lubricating oil EO through the tank passage formed in the oil tank 22n. After cooling the lubricating oil EO, the engine 22 is cooled by exchanging heat with the engine 22 through a cylinder passage formed in the cylinder block 22b (and the cylinder head 22a).

  The high-temperature cooling water heated by the heat exchange between the lubricating oil EO and the engine 22 and further heated by the exhaust heat exchanger 22o disposed in the exhaust pipe 22k becomes hot water from the outlet side 36b. Returned to the unit. In FIG. 2, the cooling water passage 36 is indicated by a thick arrow indicating the flow of the cooling water. The exhaust heat exchanger 22o has a structure in which, for example, the cooling water passage 36 is deformed to cover the exhaust pipe 22k.

  Since the cogeneration apparatus according to this embodiment is a heat main electric type, in order to generate power according to the heat demand of the user, such as a household, the electric load is low and the power generation output of the cogeneration apparatus becomes redundant. In this case, the heater (surplus power heater) 40 is energized to heat the cooling water.

  In other words, the surplus electricity generated in the power generation unit 24 is stored as thermal energy, thereby improving the energy saving efficiency, and the stored thermal energy can be used when the thermal load increases, thereby improving the ability to cope with load fluctuations. However, what is characteristic of the cogeneration apparatus 10 according to this embodiment is that the heater 40 is arranged in the oil tank 22n.

  As shown in FIG. 2, the heater 40 is specifically disposed inside the oil tank 22n, more specifically, disposed so as to be completely or partially immersed (immersed) in the lubricating oil EO. That is, the heater 40 includes a heater body 40a made of nichrome wire that generates heat due to electric resistance, a heater power line 40b connected to the inverter unit 30, and a heater that holds the heater body 40a in the oil tank 22n in a liquid-tight manner. It consists of a flange 40c.

  In the heater 40, when surplus power is sent from the generator 20 via the inverter unit 30 in response to a command from the ECU 32 and energized, the heater body 40a generates heat and heats the lubricating oil EO, and thus the lubricating oil EO. The cooling water flowing through the cooling water passage 36 passing therethrough is heated.

  As shown in FIG. 1, the power generation unit 24 includes a number of sensors, and the ECU 32 controls the operation of the engine 22 based on the output thereof, but this is not directly related to the present application, and thus the description thereof is omitted. To do.

  As described above, in the cogeneration apparatus 10 according to the first embodiment, the heater 40 that is connected to the generator 20 via the inverter unit 30 and generates heat when energized is stored, and the lubricating oil EO of the engine 22 is stored. In addition, since the cooling water in the cooling water passage 36 and the lubricating oil EO are arranged in the oil tank 22n for exchanging heat, when surplus power is generated in the generator 20, the heater 40 is energized to generate hot water. By supplying the heat load, the energy saving efficiency and the ability to cope with load fluctuations can be improved, and the heater 40 can be prevented from being deteriorated as much as possible.

  That is, since the boiling point of the lubricating oil EO of the engine 22 is 300 ° C., it is difficult to raise the temperature of the lubricating oil EO to that temperature by energizing the heater 40, and therefore, the heater 40 is hardly deteriorated due to surface erosion. The heater 40 can be prevented from being deteriorated as much as possible.

  In addition, by arranging the oil tank 22n, it is possible to reduce the installation space of the heater 40 and to use it for warming up the engine 22 during cold start. Further, since the engine 22 and the generator 20 are unitized as the power generation unit 24 and accommodated in the power generation unit case 26, it can also be used as a countermeasure against freezing during cold weather.

  Further, since the heater 40 is arranged inside the oil tank 22n, in addition to the above-described effects, the heater 40 is submerged in the lubricating oil EO, so that the temperature raising efficiency can be increased and the energy saving efficiency is further increased. Can be improved.

  FIG. 3 is an explanatory view similar to FIG. 2, schematically showing the structure of the engine of the cogeneration apparatus according to the second embodiment of the present invention.

  The description will focus on the differences from the first embodiment. In the cogeneration apparatus according to the second embodiment, the heater 40, more precisely, the heater body 40a is connected to the tank wall 22n1 of the oil tank 22n. A recess 22n11 was formed in the interior, and the heater main body 40a was embedded therein.

  Since the cogeneration apparatus according to the second embodiment is configured as described above, it is possible to increase the temperature raising efficiency and improve the energy saving efficiency substantially in the same manner as in the first embodiment, and to further improve the energy saving efficiency. Since the main body 40a is not immersed in the lubricating oil EO, it is not necessary to seal the heater main body 40a of the heater 40. The remaining configuration and effects are not different from those of the first embodiment.

  In the second embodiment, the recess 22n11 inside the tank wall 22n1 is formed shallowly so that the heater body 40a is partially buried in the tank wall 22n1 and the remaining part is exposed in the lubricating oil EO. It may be configured.

  In the first and second embodiments, as described above, the generator (starter / generator) 20 that can be connected to the AC power supply path 16 from the commercial power system (commercial power source) 12 to the electric load 14 and the generator are driven. The internal combustion engine (engine) 22 includes a power generation unit 26, and the cooling water of the internal combustion engine is guided to the cooling water passage 36 and heated by exhaust heat of the internal combustion engine to generate hot water to generate a thermal load ( In the cogeneration apparatus 10 to be supplied to the waste heat utilization hot water supply / heating unit), the heater 40 connected to the generator 20, more specifically connected through the inverter unit 30 and generating heat when energized, more specifically, Is an oil for storing the heater main body 40a and the lubricating oil EO of the internal combustion engine and exchanging heat between the cooling water in the cooling water passage and the lubricating oil EO. Together with at least provided with a link 22n, and as configured to place the heater 40 to the oil tank 22n.

  The heater 40, more specifically, the heater body 40a is arranged inside the oil tank 22n.

  The heater 40, more specifically, the heater main body 40a is embedded in the tank wall 22n1 of the oil tank 22n.

  In the first and second embodiments, the gas engine using city gas / LP gas as fuel is used as the drive source of the generator 20, but an engine using gasoline fuel or the like may be used.

  Although the output of the generator 20, the displacement of the engine 22 and the like are shown as specific values, it is needless to say that these are merely examples and are not limited.

1 is a block diagram generally showing a cogeneration apparatus according to a first embodiment of the present invention. It is explanatory drawing which shows typically the structure of the engine shown in FIG. It is explanatory drawing similar to FIG. 2 which shows typically the structure of the engine of the cogeneration apparatus which concerns on 2nd Example of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Cogeneration apparatus, 12 Commercial power supply (commercial power system), 14 Electric load, 16 Feeding path (power line), 20 Generator (starter / generator), 22 Engine (internal combustion engine), 22a Cylinder head, 22b Cylinder block, 22n Oil tank, 22n1 tank wall, 24 power generation unit, 26 power generation unit case, 36 cooling water passage, 40 heater, 40a heater body

Claims (3)

  1. A power generation unit comprising a generator connectable to a power supply path of AC power from a commercial power system to an electric load and an internal combustion engine that drives the generator, and leading cooling water of the internal combustion engine to a cooling water passage, In the cogeneration apparatus that heats the exhaust heat of the internal combustion engine to generate hot water and supplies it to a heat load,
    a. A heater connected to the generator and generating heat when energized;
    And b. An oil tank for storing lubricating oil of the internal combustion engine and exchanging heat between the cooling water in the cooling water passage and the lubricating oil;
    The cogeneration apparatus is characterized in that the heater is disposed in the oil tank.
  2.   The cogeneration apparatus according to claim 1, wherein the heater is disposed inside the oil tank.
  3.   The cogeneration apparatus according to claim 1, wherein the heater is embedded in a tank wall of the oil tank.
JP2007212977A 2007-08-17 2007-08-17 Co-generation apparatus Pending JP2009047052A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013503298A (en) * 2009-08-27 2013-01-31 マクアリスター テクノロジーズ エルエルシー Energy system for residential facilities support

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53121504A (en) * 1977-03-31 1978-10-24 Nec Corp Automatic answering telephone set
JPS54134839A (en) * 1978-04-10 1979-10-19 Ford Motor Co Electrode for thermoelectricity generator
JPH06212934A (en) * 1993-01-21 1994-08-02 Yuugiyokuen Ceramics:Kk Heater for preventing fluidity of engine oil from deteriorating
JPH084586A (en) * 1994-06-20 1996-01-09 Tokyo Gas Co Ltd Cogeneration system
JP2001132539A (en) * 1999-11-01 2001-05-15 Honda Motor Co Ltd Exhaust heat recovery system for engine
JP2002129957A (en) * 2000-10-19 2002-05-09 Meidensha Corp Diesel generator
JP2006283579A (en) * 2005-03-31 2006-10-19 Honda Motor Co Ltd Cogeneration device
JP2007056748A (en) * 2005-08-24 2007-03-08 Honda Motor Co Ltd Cogeneration device

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53121504A (en) * 1977-03-31 1978-10-24 Nec Corp Automatic answering telephone set
JPS54134839A (en) * 1978-04-10 1979-10-19 Ford Motor Co Electrode for thermoelectricity generator
JPH06212934A (en) * 1993-01-21 1994-08-02 Yuugiyokuen Ceramics:Kk Heater for preventing fluidity of engine oil from deteriorating
JPH084586A (en) * 1994-06-20 1996-01-09 Tokyo Gas Co Ltd Cogeneration system
JP2001132539A (en) * 1999-11-01 2001-05-15 Honda Motor Co Ltd Exhaust heat recovery system for engine
JP2002129957A (en) * 2000-10-19 2002-05-09 Meidensha Corp Diesel generator
JP2006283579A (en) * 2005-03-31 2006-10-19 Honda Motor Co Ltd Cogeneration device
JP2007056748A (en) * 2005-08-24 2007-03-08 Honda Motor Co Ltd Cogeneration device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013503298A (en) * 2009-08-27 2013-01-31 マクアリスター テクノロジーズ エルエルシー Energy system for residential facilities support

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