JP3995643B2 - Waste heat utilization system - Google Patents

Waste heat utilization system Download PDF

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JP3995643B2
JP3995643B2 JP2003311533A JP2003311533A JP3995643B2 JP 3995643 B2 JP3995643 B2 JP 3995643B2 JP 2003311533 A JP2003311533 A JP 2003311533A JP 2003311533 A JP2003311533 A JP 2003311533A JP 3995643 B2 JP3995643 B2 JP 3995643B2
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JP2005077067A (en
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大作 佐藤
詳明 山崎
幹也 石井
史樹 乾
裕二 中井
大樹 小山
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Osaka Gas Co Ltd
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    • 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
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/20—Solar thermal
    • 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
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/40—Solar thermal energy, e.g. solar towers
    • 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
    • Y02E20/14—Combined heat and power generation [CHP]
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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Description

本発明は、複数の排熱発生装置の夫々から排熱を回収して排出される熱媒を排熱利用装置に供給する排熱利用システムに関する。   The present invention relates to an exhaust heat utilization system that supplies a heat medium, which is exhausted by recovering exhaust heat from each of a plurality of exhaust heat generation apparatuses, to an exhaust heat utilization apparatus.

近年、エネルギの有効利用の観点から、複数の住宅などに設置された排熱発生装置から排熱を回収して排出される熱媒を集めて、その大量の熱媒を学校、介護施設、病院、スーパーマーケットなどに設けられた大規模な排熱利用装置に供給することが要望されている。ここで、各住宅に設置される排熱発生装置としては、ガスエンジンや燃料電池などの熱電併給装置やガスヒートポンプ装置などがある。ガスエンジン、燃料電池、ガスヒートポンプ装置などから排出される熱媒の温度は様々であり、排熱利用装置が必要とする熱媒の温度もまた様々である。例えば、固体高分子型燃料電池の作動温度は約８０℃であるため排出される熱媒の温度は８０℃以下となるが、この温度の熱媒は給湯や暖房といった用途には利用できるものの、冷房の用途に利用するには温度が低すぎるといった問題がある。また、排熱発生装置に併設される熱媒貯留槽に貯留され、温度が下がってしまった熱媒も同様に冷房などの用途には利用できないものであった。   In recent years, from the viewpoint of effective use of energy, the heat medium collected by exhaust heat from exhaust heat generators installed in multiple houses is collected, and the large amount of heat medium is collected at schools, nursing homes, hospitals. Therefore, there is a demand for supplying to a large-scale exhaust heat utilization device provided in a supermarket or the like. Here, examples of the exhaust heat generator installed in each house include a combined heat and power device such as a gas engine and a fuel cell, a gas heat pump device, and the like. The temperature of the heat medium discharged from a gas engine, a fuel cell, a gas heat pump device, or the like varies, and the temperature of the heat medium required by the exhaust heat utilization device also varies. For example, since the operating temperature of the polymer electrolyte fuel cell is about 80 ° C., the temperature of the discharged heat medium is 80 ° C. or less, but this temperature heat medium can be used for applications such as hot water supply and heating, There is a problem that the temperature is too low for use in cooling applications. In addition, the heat medium stored in the heat medium storage tank attached to the exhaust heat generator and having the temperature lowered cannot be used for cooling or the like.

そこで、排熱発生装置から排出された温度の低い熱媒を増熱手段にて増熱した上で排熱利用装置に提供するような排熱利用システムが提案されている（例えば、特許文献１参照）。この排熱利用システムの増熱手段は太陽熱に加えて電力を補助的に利用した装置であり、利用価値の低かった低温の熱媒を利用価値の高い高温の熱媒に変えた後で排熱利用装置に提供している。   Thus, an exhaust heat utilization system has been proposed in which a heat medium having a low temperature exhausted from the exhaust heat generation apparatus is heated by a heat increase means and then provided to the exhaust heat utilization apparatus (for example, Patent Document 1). reference). The heat increase means of this exhaust heat utilization system is a device that uses electric power in addition to solar heat, and after changing the low-temperature heat medium with low utility value to the high-temperature heat medium with high utility value, exhaust heat Provided to use devices.

特開２００２−８１８７９号公報JP 2002-81879 A

特許文献１に記載のような排熱利用システムが、例えば燃料電池のような排熱発生装置を備えた複数の住宅に設置される場合、複数の住宅の夫々に上述の太陽熱利用の増熱手段が設けられ、排熱発生装置から排出される熱媒をその増熱手段で夫々増熱した後で集めるようなシステムが構成されると考えられる。しかし、各住宅に設置可能な増熱手段は設置スペースやコストなどの問題から小規模なものと成らざるを得ず、それが太陽熱を利用した増熱手段である場合には、小規模であるほど効率の低い増熱手段になるものと想定される。また、増熱手段が複数の住宅に設けられている場合には、排熱利用システム全体としてそれら増熱手段のメンテナンス作業に要する手間も大きくなるという問題がある。   When the exhaust heat utilization system as described in Patent Document 1 is installed in a plurality of houses provided with an exhaust heat generator such as a fuel cell, for example, the above-described solar heat utilization heating means is provided in each of the plurality of houses. It is considered that a system is constructed in which the heat medium discharged from the exhaust heat generator is collected after the heat is increased by the heat increasing means. However, the heat increase means that can be installed in each house is inevitably small due to problems such as installation space and cost, and is small if it is a heat increase means using solar heat. It is assumed that the heat increasing means is less efficient. Further, when the heat increasing means is provided in a plurality of houses, there is a problem that the labor required for maintenance work of the heat increasing means as a whole exhaust heat utilization system is increased.

本発明は、上記の課題に鑑みてなされたものであり、その目的は、複数の排熱発生装置からの熱媒を効率良く、しかもメンテナンス性の優れた形態で増熱して排熱利用装置に供給することができる排熱利用システムを提供する点にある。   The present invention has been made in view of the above problems, and its purpose is to increase the heat medium from a plurality of exhaust heat generators efficiently and in a form with excellent maintainability to an exhaust heat utilization device. It is in providing a waste heat utilization system that can be supplied.

上記目的を達成するための本発明に係る排熱利用システムの第１特徴構成は、複数の排熱発生装置の夫々から排熱を回収して排出される熱媒を集めた合流状態の熱媒が熱媒貯留槽に貯留され、当該熱媒貯留槽に貯留されている前記合流状態の熱媒が太陽熱利用の増熱手段に供給され、その増熱手段にて加熱された前記合流状態の熱媒が排熱利用装置に供給されるように構成され、
前記増熱手段が、供給される前記合流状態の熱媒が通流する加熱部の太陽光入射面よりも広範囲の太陽光を前記加熱部に集光して、前記合流状態の熱媒を蒸気に加熱して前記排熱利用装置に供給可能に構成され、
前記熱媒貯留槽から前記増熱手段へ供給される前記合流状態の熱媒の流量が、太陽光の強弱に応じて調節されるように構成される点にある。 In order to achieve the above object, the first feature configuration of the exhaust heat utilization system according to the present invention is a combined heat medium that collects the heat medium recovered by exhaust heat from each of the plurality of exhaust heat generators. Is stored in the heat medium storage tank, and the combined heat medium stored in the heat medium storage tank is supplied to the heat increasing means using solar heat and heated in the heat increasing means. The medium is configured to be supplied to the exhaust heat utilization device,
The heat increasing means condenses sunlight in a wider range than the sunlight incident surface of the heating unit through which the supplied heat medium to be supplied flows to the heating unit, and vaporizes the combined heat medium. It can be heated to supply to the exhaust heat utilization device,
The flow rate of the combined heat medium supplied from the heat medium storage tank to the heat increasing means is configured to be adjusted according to the intensity of sunlight .

上記第１特徴構成によれば、複数の排熱発生装置の夫々から排熱を回収して排出される熱媒が集められ、その集められた合流状態の熱媒が太陽熱利用の増熱手段で増熱されて排熱利用装置に供給されることとなる。
そして、合流状態の熱媒を加熱する太陽熱利用の増熱手段は、大きな設置スペースを確保して、充分な加熱能力を有する大規模な設備として設置することが可能となるため、充分な加熱能力を有する大規模な設備として構成される増熱手段により、高効率に熱媒の増熱を行うことが可能となり、又、大規模な設備ではあるものの、集中して設置されることになる増熱手段は、メンテナンス作業も少ない手間で集中して行い易いものとなる。従って、複数の排熱発生装置からの熱媒を効率良く、しかもメンテナンス性の優れた形態で増熱して排熱利用装置に供給することができる排熱利用システムを提供するに至った。
また、熱媒が通流する加熱部の太陽光入射面よりも広範囲の太陽光が加熱部に集光された高性能の増熱手段によって熱媒を蒸気に増熱して排熱利用装置に供給可能であるので、排熱発生装置から集められた熱媒が利用価値の低い低温の熱媒であっても、この高性能の増熱手段によって利用価値の高い蒸気の熱媒又は高温の熱媒に変えた上で排熱利用装置に供給することが可能となる。
加えて、複数の排熱発生装置から集められた合流状態の熱媒を貯留する熱媒貯留槽を設けた場合、熱媒貯留槽から増熱手段へ流入する熱媒の流量を太陽光の強弱（つまり、増熱手段の加熱能力の大小）に応じて調整することで、増熱手段から流出して排熱利用装置に供給される熱媒の温度を一定に制御することが可能となる。 According to the first characteristic configuration, the heat medium that collects the exhaust heat from each of the plurality of exhaust heat generators and collects the exhaust heat medium is collected, and the collected heat medium is a heat increase means using solar heat. The heat is increased and supplied to the exhaust heat utilization device.
And the solar heat-based heat increasing means that heats the combined heat medium can secure a large installation space and can be installed as a large-scale facility with sufficient heating capacity. The heat increase means configured as a large-scale facility having a large-scale facility makes it possible to increase the heat medium with high efficiency. The heating means is easy to concentrate and perform maintenance work with little effort. Accordingly, the present invention has provided an exhaust heat utilization system that can efficiently increase the heat medium from a plurality of exhaust heat generation apparatuses and supply it to the exhaust heat utilization apparatus in a form with excellent maintainability.
In addition, the heat medium is heated to steam by a high-performance heating means that collects sunlight in a wider area than the sunlight incident surface of the heating section through which the heat medium flows, and is supplied to the exhaust heat utilization device. Therefore, even if the heat medium collected from the exhaust heat generator is a low-temperature heat medium having a low utility value, this high-performance heating means can be used for a steam heat medium or a high-temperature heat medium having a high utility value. It becomes possible to supply to a waste heat utilization apparatus after changing to.
In addition, when a heat medium storage tank for storing the combined heat medium collected from a plurality of exhaust heat generators is provided, the flow rate of the heat medium flowing from the heat medium storage tank to the heat increasing means is adjusted to the intensity of sunlight. By adjusting according to (that is, the heating capacity of the heat increasing means), the temperature of the heat medium flowing out from the heat increasing means and supplied to the exhaust heat utilization apparatus can be controlled to be constant.

本発明に係る排熱利用システムの第２特徴構成は、上記第１特徴構成に加えて、前記合流状態の熱媒を燃料を消費して加熱する補助加熱部が設けられている点にある。 The second feature configuration of the exhaust heat utilization system according to the present invention is that, in addition to the first feature configuration , an auxiliary heating unit that heats the combined heat medium by consuming fuel is provided.

上記第２特徴構成によれば、太陽光が弱いとき又は排熱利用装置における熱需要が大きいときには太陽熱利用の増熱手段によってすべての熱需要を賄いきれない可能性もあるが、熱媒を燃料を消費して加熱する補助加熱部が設けられているので、排熱利用装置に対して十分な熱媒を供給することが可能となる。 According to the second characteristic configuration described above, when the sunlight is weak or the heat demand in the exhaust heat utilization device is large, there is a possibility that not all heat demand can be covered by the solar heat utilization heating means. Since the auxiliary heating unit that consumes and heats is provided, a sufficient heat medium can be supplied to the exhaust heat utilization device.

＜第１実施形態＞
以下に図１を参照して本発明に係る排熱利用システムについて説明する。
この排熱利用システムは、複数の住宅などに設置された複数の排熱発生装置９の夫々から排熱を回収して装置外部に排出される熱媒を集めた合流状態の熱媒が、太陽熱利用の増熱装置（増熱手段の一例）１に供給され、その増熱装置１にて加熱された熱媒が排熱利用装置１０に供給されるように構成されている。ここで、排熱発生装置９は、ガスエンジンや燃料電池などの熱電併給装置やガスヒートポンプ装置など、発生する排熱が熱媒にて回収され、その熱媒が装置外部に排出されるような装置である。例えば、燃料電池の電池冷却水は燃料電池内部の熱を外部に排出する熱媒である。排熱利用装置１０は、供給される高温の熱媒を用いて冷房を行う冷房装置などである。
ここで、排熱発生装置９から排出された熱媒は併設される熱媒貯留槽（図示せず）に貯留され、その熱媒貯留槽から増熱装置１へと送出されることとなる。このとき、熱媒貯留槽に貯留されている、温度が低く、即ち利用価値が低い熱媒や排熱発生装置９から排出される、温度が低く、即ち利用価値が低い熱媒が熱媒貯留槽から増熱装置１へ送出される場合や、定められた量の熱媒が毎日熱媒貯留槽から増熱装置１へ送出される場合や、排熱発生装置９が設置された住宅での消費熱媒量を超える余剰の熱媒が熱媒貯留槽から増熱装置１へ送出される場合などがある。 <First Embodiment>
The exhaust heat utilization system according to the present invention will be described below with reference to FIG.
In this exhaust heat utilization system, the combined heat medium that collects the heat medium that collects the exhaust heat from each of the plurality of exhaust heat generators 9 installed in a plurality of houses and exhausts the solar heat, The heat medium that is supplied to the utilization heat increase device (an example of the heat increase means) 1 and heated by the heat increase device 1 is supplied to the exhaust heat utilization device 10. Here, the exhaust heat generator 9 recovers the generated exhaust heat with a heat medium such as a combined heat and power device such as a gas engine or a fuel cell or a gas heat pump device, and the heat medium is discharged outside the apparatus. Device. For example, the battery cooling water of the fuel cell is a heat medium that discharges the heat inside the fuel cell to the outside. The exhaust heat utilization apparatus 10 is a cooling apparatus that performs cooling using a supplied high-temperature heat medium.
Here, the heat medium discharged from the exhaust heat generating device 9 is stored in a heat medium storage tank (not shown) provided side by side, and is sent from the heat medium storage tank to the heat increasing device 1. At this time, the heat medium stored in the heat medium storage tank is discharged from the heat medium or the exhaust heat generator 9 having a low temperature, that is, a low utility value, and the heat medium having a low temperature, that is, a low utility value, is stored in the heat medium. When sent from the tank to the heat increasing device 1, when a predetermined amount of heat medium is sent from the heat medium storage tank to the heat increasing device 1 every day, or in a house where the exhaust heat generating device 9 is installed There are cases where an excess of the heat medium exceeding the amount of heat medium consumed is sent from the heat medium storage tank to the heat increasing device 1.

増熱装置１は、複数の排熱発生装置９から排出された合流状態の熱媒を、太陽光（熱）を利用して加熱する装置であり、具体的には、太陽光を受光して集光する集光部２と、その集光部２にて集光されて入射される太陽光を熱エネルギに変換して、その熱エネルギで熱媒を加熱する加熱部３とを備えている。この加熱部３は、入射された太陽光を熱に変換し、加熱部３の内部を通流する熱媒にその熱を与えるような熱交換器である。ここで、集光レンズなどにて構成される集光部２の受光面４の面積は、加熱部３への太陽光の入射面５の面積よりも大きく構成されている。その結果、入射面５よりも広範囲の太陽光を加熱部５に集光することが可能となり、集光部２を設けない場合に加熱部３の入射面５に入射される太陽光のエネルギよりも大きいエネルギが入射面５に入射されることになる。このように、集光部２によって集光され、エネルギ密度が高められた太陽光が加熱部３へと入射されるので、大量且つ低温の熱媒であっても高温に加熱することができる高性能な増熱装置１が構成される。また、この排熱利用システムでは増熱装置１の設置数を少なくできるので、そのメンテナンス作業のための手間も減少されることとなる。   The heat increasing device 1 is a device that heats the combined heat medium discharged from the plurality of exhaust heat generating devices 9 using sunlight (heat), and specifically receives sunlight. Condensing part 2 which condenses, and heating part 3 which converts sunlight which is condensed in the condensing part 2 and enters into heat energy, and heats a heat carrier with the heat energy . The heating unit 3 is a heat exchanger that converts incident sunlight into heat and applies the heat to a heat medium flowing through the inside of the heating unit 3. Here, the area of the light receiving surface 4 of the condensing unit 2 configured by a condensing lens or the like is configured to be larger than the area of the incident surface 5 of sunlight on the heating unit 3. As a result, it is possible to condense sunlight in a wider range than the incident surface 5 onto the heating unit 5, and from the energy of sunlight incident on the incident surface 5 of the heating unit 3 when the condensing unit 2 is not provided. Larger energy is incident on the incident surface 5. Thus, since the sunlight condensed by the light collecting unit 2 and having an increased energy density is incident on the heating unit 3, even a large amount and a low temperature heating medium can be heated to a high temperature. A high-performance heat increasing device 1 is configured. Moreover, in this exhaust heat utilization system, since the number of installation of the heat increasing apparatus 1 can be reduced, the effort for the maintenance work is also reduced.

次に、排熱発生装置９が、地域に分散している複数の住宅のそれぞれに設置されている固体高分子型燃料電池であり、排熱利用装置１０が、その地域の大規模な介護施設に設置されている冷房装置である場合のこの排熱利用システムの運用について説明する。
各住宅に設置された固体高分子型燃料電池の電池冷却水として電池外部に排出される低温の熱媒（温度は約８０℃以下）は、排熱収集路１１を介して増熱装置１に集められる。増熱装置１に集められた合流状態の熱媒は、入射される太陽光を熱に変換する加熱部３の内部を通流中に加熱される。上述のように、レンズなどの集光装置にて構成される集光部２における太陽光の受光面４の面積は加熱部３への太陽光の入射面５の面積よりも大きく構成されているので、加熱部３による熱媒の加熱性能は高く、複数の固体高分子型燃料電池（排熱発生装置９）から集められた合流状態の熱媒が大量且つ低温であっても、高温に加熱することができるように構成されている。
そして、増熱装置１にて加熱された高温の熱媒は排熱供給路１２を介して介護施設（排熱利用装置１０）に供給され、その介護施設の冷房用途をはじめ給湯用途や暖房用途などに使用されることになる。
ここで、加熱部３から熱媒に与えられる熱エネルギが大きい場合には、その熱媒を蒸気に加熱して、その熱媒蒸気を介護施設（排熱利用装置１０）に供給することもできる。 Next, the exhaust heat generator 9 is a polymer electrolyte fuel cell installed in each of a plurality of houses dispersed in the area, and the exhaust heat utilization apparatus 10 is a large-scale care facility in the area. The operation of this exhaust heat utilization system in the case of a cooling device installed in will be described.
A low-temperature heat medium (temperature is about 80 ° C. or less) discharged to the outside of the battery as the battery cooling water of the polymer electrolyte fuel cell installed in each house is sent to the heat increasing device 1 via the exhaust heat collecting path 11. Collected. The combined heat medium collected in the heat increasing device 1 is heated while flowing through the inside of the heating unit 3 that converts incident sunlight into heat. As described above, the area of the sunlight receiving surface 4 in the light collecting unit 2 configured by a light collecting device such as a lens is configured to be larger than the area of the sunlight incident surface 5 to the heating unit 3. Therefore, the heating performance of the heating medium by the heating unit 3 is high, and the heating medium gathered from a plurality of polymer electrolyte fuel cells (exhaust heat generation device 9) is heated to a high temperature even if a large amount and a low temperature are combined. It is configured to be able to.
Then, the high-temperature heat medium heated by the heat increasing device 1 is supplied to the care facility (exhaust heat utilization device 10) via the exhaust heat supply path 12, and is used for the hot water supply and heating applications including the cooling use of the care facility. It will be used for such as.
Here, when the heat energy given to the heat medium from the heating unit 3 is large, the heat medium can be heated to steam and the heat medium steam can be supplied to the care facility (exhaust heat utilization device 10). .

このように、利用価値の低かった低温の熱媒を各排熱発生装置９から大量に回収し、大規模な増熱装置１にて効率的に加熱した後の高温の熱媒を、排熱利用装置１０に供給するように構成されているので、太陽光という自然エネルギを用いて熱媒の付加価値を効率的に高めることができる排熱利用システムが提供される。
また、本実施形態において、増熱装置１に併設されるような、複数の排熱発生装置９から集められた合流状態の熱媒を貯留する熱媒貯留槽を設けてもよい。例えば、複数の排熱発生装置９から集められた合流状態の熱媒を貯留する熱媒貯留槽を設けた場合、集められた合流状態の熱媒が熱媒貯留槽から増熱装置１へ一定流量で熱媒が流入するように調整することで、増熱装置１から流出して排熱利用装置１０に供給される熱媒の温度を一定に制御することが可能となる。また、熱媒貯留槽から増熱装置１へ流入する熱媒の流量を太陽光の強弱（つまり、増熱装置１の加熱能力の大小）に応じて調整することで、増熱装置１から流出して排熱利用装置１０に供給される熱媒の温度を一定に制御することも可能となる。 In this way, a low-temperature heat medium having a low utility value is recovered in large quantities from each exhaust heat generator 9, and the high-temperature heat medium after being efficiently heated by the large-scale heat increasing device 1 is exhausted. Since it is comprised so that it may supply to the utilization apparatus 10, the waste heat utilization system which can raise the added value of a heat medium efficiently using the natural energy called sunlight is provided.
Moreover, in this embodiment, you may provide the heat-medium storage tank which stores the heat medium of the confluence | merging state collected from the several exhaust heat generator 9 which is attached to the heat increase apparatus 1. FIG. For example, in the case where a heat medium storage tank that stores the combined heat medium collected from the plurality of exhaust heat generators 9 is provided, the collected heat medium that is collected is constant from the heat medium storage tank to the heat increasing device 1. By adjusting the flow rate so that the heat medium flows in, the temperature of the heat medium flowing out from the heat increasing device 1 and supplied to the exhaust heat utilization device 10 can be controlled to be constant. In addition, the flow rate of the heat medium flowing from the heat medium storage tank to the heat increasing device 1 is adjusted according to the intensity of sunlight (that is, the heating capacity of the heat increasing device 1), thereby flowing out from the heat increasing device 1. Thus, the temperature of the heat medium supplied to the exhaust heat utilization device 10 can be controlled to be constant.

＜第２実施形態＞
図２に示す第２実施形態に係る排熱利用システムは、合流状態の熱媒を燃料を消費して加熱する補助加熱部６が設けられている点で第１実施形態と異なる。
この排熱利用システムでは、第１実施形態と同様に増熱装置１も設けられており、複数の排熱発生装置９から集められた合流状態の熱媒は、増熱装置１及び補助加熱部６の両方を用いて加熱することができる。増熱装置１の構成は第１実施形態において説明したのと同様であるが、太陽光が弱いときには加熱部３での加熱性能が低下し、集められた合流状態の熱媒の温度を十分に高くできない可能性がある。このため、加熱部３にて加熱された後の熱媒温度を温度センサ１３によって監視し、その熱媒温度が所定の設定温度よりも低い場合には補助加熱部６を稼動させて、排熱利用装置１０に供給される熱媒の温度を高めるように構成されている。 Second Embodiment
The exhaust heat utilization system according to the second embodiment shown in FIG. 2 differs from the first embodiment in that an auxiliary heating unit 6 that heats the combined heat medium by consuming fuel is provided.
In this exhaust heat utilization system, the heat increasing device 1 is also provided as in the first embodiment, and the combined heat medium collected from the plurality of exhaust heat generating devices 9 is the heat increasing device 1 and the auxiliary heating unit. 6 can be used for heating. The configuration of the heat increasing device 1 is the same as that described in the first embodiment. However, when sunlight is weak, the heating performance in the heating unit 3 is lowered, and the temperature of the collected heat medium in the combined state is sufficiently high. May not be high. For this reason, the temperature of the heating medium after being heated by the heating unit 3 is monitored by the temperature sensor 13, and when the temperature of the heating medium is lower than a predetermined set temperature, the auxiliary heating unit 6 is operated to exhaust heat. The temperature of the heat medium supplied to the utilization device 10 is increased.

補助加熱部６は、燃焼部７に供給される燃料（例えば、ガス）と空気とを燃焼させて得られる熱を、補助加熱部６の内部を通流する熱媒に与える熱交換器である。そして、補助加熱部６を出た後の熱媒温度を温度センサ１４によって監視し、その熱媒温度が所定の設定温度と等しくなるように、燃焼部７に供給される燃料量（ガス量）と空気量とを調整して燃焼を制御する。
そして、増熱装置１及び補助加熱部６にて加熱された高温の熱媒は排熱供給路１２を介して排熱利用装置１０に供給され、冷房用途などに使用されることになる。 The auxiliary heating unit 6 is a heat exchanger that applies heat obtained by burning fuel (for example, gas) and air supplied to the combustion unit 7 to a heat medium that flows inside the auxiliary heating unit 6. . Then, the temperature of the heating medium after exiting the auxiliary heating unit 6 is monitored by the temperature sensor 14, and the amount of fuel (gas amount) supplied to the combustion unit 7 so that the heating medium temperature becomes equal to a predetermined set temperature. And the amount of air are adjusted to control combustion.
Then, the high-temperature heat medium heated by the heat increasing device 1 and the auxiliary heating unit 6 is supplied to the exhaust heat utilization device 10 via the exhaust heat supply path 12, and is used for cooling applications and the like.

このように、利用価値の低かった低温の熱媒を各排熱発生装置９から大量に回収し、太陽光のエネルギを利用した増熱装置１と燃焼熱を利用した補助加熱部６とによって熱媒を加熱できるように構成されているので、加熱部３に入射される太陽光が十分でないとき又は排熱利用装置１０における熱需要が大きいときであっても、排熱利用装置１０には大量且つ高温の熱媒を十分に供給することが可能となる。   In this way, a low-temperature heat medium having a low utility value is collected in large quantities from each exhaust heat generator 9 and heated by the heat increasing device 1 using solar energy and the auxiliary heating unit 6 using combustion heat. Since the medium can be heated, the exhaust heat utilization apparatus 10 has a large amount even when the sunlight incident on the heating unit 3 is insufficient or when the heat demand in the exhaust heat utilization apparatus 10 is large. In addition, it is possible to sufficiently supply a high-temperature heat medium.

＜別実施形態＞
＜１＞
上記の実施形態では、集光レンズを例に挙げて集光部２の機能を説明したが、集光レンズ以外の装置を用いても構わない。例えば、集光部２としてパラボラ反射鏡を用いた場合には、そのパラボラ反射鏡において加熱部３の入射面５よりも広範囲の太陽光を受光して、加熱部３への太陽光の入射面５へと反射するように構成することで、集光部２を設けない場合に加熱部３の入射面５に入射される太陽光のエネルギよりも大きいエネルギが入射面５に入射されることになる。その結果、大量且つ低温の熱媒であっても高温に加熱することができる高性能な増熱装置１が得られる。
また、パラボラ反射鏡以外の反射鏡を集光部２として用いることも可能である。例えば、加熱部３の入射面５よりも広範囲の太陽光を複数の反射鏡により受光し、それら複数の反射鏡にて受光された太陽光が、加熱部３の入射面５に入射するように構成しておけば、集光部２を設けない場合に加熱部３の入射面５に入射される太陽光のエネルギよりも大きいエネルギが入射面５に入射されることになり、大量且つ低温の熱媒であっても高温に加熱することができる高性能な増熱装置１が得られる。 <Another embodiment>
<1>
In the above embodiment, the function of the condensing unit 2 has been described by taking a condensing lens as an example, but an apparatus other than the condensing lens may be used. For example, when a parabolic reflector is used as the light collecting unit 2, the parabolic reflector receives sunlight in a wider range than the incident surface 5 of the heating unit 3, and the incident surface of the sunlight to the heating unit 3. 5 is configured such that energy larger than the energy of sunlight incident on the incident surface 5 of the heating unit 3 is incident on the incident surface 5 when the condensing unit 2 is not provided. Become. As a result, a high-performance heat increasing device 1 that can be heated to a high temperature even with a large amount of a low-temperature heat medium can be obtained.
Moreover, it is also possible to use a reflecting mirror other than the parabolic reflecting mirror as the light collecting unit 2. For example, a wider range of sunlight than the incident surface 5 of the heating unit 3 is received by a plurality of reflecting mirrors, and the sunlight received by the plurality of reflecting mirrors is incident on the incident surface 5 of the heating unit 3. If configured, the energy larger than the energy of sunlight incident on the incident surface 5 of the heating unit 3 is incident on the incident surface 5 when the condensing unit 2 is not provided. Even if it is a heat medium, the high-performance heat increase apparatus 1 which can be heated to high temperature is obtained.

＜２＞
上述の実施形態において、増熱装置１において加熱された熱媒が貯留される熱媒貯留槽を設けてもよい。例えば、増熱装置１にて加熱された後の熱媒を貯留する熱媒貯留槽を設けた場合には、増熱装置１において加熱される熱媒量が排熱利用装置１０での熱媒の需要量よりも多い場合には、余剰の熱媒を上記熱媒貯留槽に貯留しておくことが可能となる。他方で、増熱装置１において加熱される熱媒量が排熱利用装置１０での熱媒の需要量よりも少ない場合には、不足の熱媒を上記熱媒貯留槽に予め貯留しておいた熱媒で賄うことが可能となる。 <2>
In the above-described embodiment , a heat medium storage tank in which the heat medium heated in the heat increasing device 1 is stored may be provided. For example, when a heat medium storage tank for storing the heat medium heated by the heat increase device 1 is provided, the amount of the heat medium heated in the heat increase device 1 is the heat medium in the exhaust heat utilization device 10. When there is more demand amount than this, it becomes possible to store an excess heat medium in the said heat medium storage tank. On the other hand, when the amount of the heat medium heated in the heat increasing device 1 is less than the demand amount of the heat medium in the exhaust heat utilization device 10, the insufficient heat medium is stored in the heat medium storage tank in advance. It is possible to cover with the heat medium that was used.

＜３＞
上記の実施形態では、複数の排熱発生装置９から集められた合流状態の熱媒を増熱装置１にて加熱し、加熱された熱媒を１つの排熱利用装置１０に供給する場合の例について説明しているが、増熱装置１によって加熱された熱媒を複数の排熱利用装置１０に供給することも可能である。また、増熱装置１を複数台設け、１台の増熱装置１を設ける場合に比べて更に高い加熱性能を有する増熱装置を構築することも可能である。 <3>
In the above embodiment, the combined heat medium collected from the plurality of exhaust heat generators 9 is heated by the heat increasing device 1, and the heated heat medium is supplied to one exhaust heat utilization device 10. Although an example has been described, it is possible to supply the heat medium heated by the heat increasing device 1 to the plurality of exhaust heat utilization devices 10. It is also possible to construct a heat increasing device having a higher heating performance than a case where a plurality of heat increasing devices 1 are provided and one heat increasing device 1 is provided.

排熱利用システムの構成図Configuration diagram of waste heat utilization system 排熱利用システムの別の構成図Another configuration diagram of exhaust heat utilization system

符号の説明Explanation of symbols

１ 増熱装置（増熱手段）
９ 排熱発生装置
１０ 排熱利用装置 1 Heat increase device (heat increase means)
9 Waste heat generator 10 Waste heat utilization device

Claims (2)

複数の排熱発生装置の夫々から排熱を回収して排出される熱媒を集めた合流状態の熱媒が熱媒貯留槽に貯留され、当該熱媒貯留槽に貯留されている前記合流状態の熱媒が太陽熱利用の増熱手段に供給され、その増熱手段にて加熱された前記合流状態の熱媒が排熱利用装置に供給されるように構成され、
前記増熱手段が、供給される前記合流状態の熱媒が通流する加熱部の太陽光入射面よりも広範囲の太陽光を前記加熱部に集光して、前記合流状態の熱媒を蒸気に加熱して前記排熱利用装置に供給可能に構成され、
前記熱媒貯留槽から前記増熱手段へ供給される前記合流状態の熱媒の流量が、太陽光の強弱に応じて調節されるように構成される排熱利用システム。 The merging state heating medium merging state a collection of heating medium which is discharged by recovering waste heat from each of the plurality of heat generating devices stored in the heat medium storage tank, and is stored in the heat medium storage tank The heat medium is supplied to the heat increase means using solar heat, and the combined heat medium heated by the heat increase means is supplied to the exhaust heat utilization apparatus,
The heat increasing means condenses sunlight in a wider range than the sunlight incident surface of the heating unit through which the supplied heat medium to be supplied flows to the heating unit, and vaporizes the combined heat medium. It can be heated to supply to the exhaust heat utilization device,
An exhaust heat utilization system configured such that the flow rate of the combined heat medium supplied from the heat medium storage tank to the heat increasing means is adjusted according to the intensity of sunlight . 前記合流状態の熱媒を燃料を消費して加熱する補助加熱部が設けられている請求項１に記載の排熱利用システム。The exhaust heat utilization system according to claim 1, wherein an auxiliary heating unit that heats the combined heat medium by consuming fuel is provided.
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