JP2005233435A - Absorption dehumidifying air conditioning system - Google Patents

Absorption dehumidifying air conditioning system Download PDF

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JP2005233435A
JP2005233435A JP2004039117A JP2004039117A JP2005233435A JP 2005233435 A JP2005233435 A JP 2005233435A JP 2004039117 A JP2004039117 A JP 2004039117A JP 2004039117 A JP2004039117 A JP 2004039117A JP 2005233435 A JP2005233435 A JP 2005233435A
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liquid
air
moisture
hygroscopic liquid
hygroscopic
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JP2005233435A5 (en
JP4423499B2 (en
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Eizo Taira
栄蔵 平
Toshimi Kuroki
利美 黒木
Haruhisa Ida
晴久 位田
Mikio Furuta
幹雄 古田
Eisuke Miyahara
英輔 宮原
Nobuyoshi Kamimura
信好 上村
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Miyazaki Prefecture
宮崎県
Furuta Netsuki Kk
フルタ熱機株式会社
Kyushu Olympia Kogyo Kk
九州オリンピア工業株式会社
Akitsu Create:Kk
有限会社秋津クリエイト
Haruhisa Ida
晴久 位田
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F24F3/1411Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by absorbing or adsorbing water, e.g. using an hygroscopic desiccant
    • F24F3/1417Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by absorbing or adsorbing water, e.g. using an hygroscopic desiccant with liquid hygroscopic desiccants

Abstract

<P>PROBLEM TO BE SOLVED: To provide an absorption dehumidifying air conditioning system capable of easily dehumidifying and cooling an agricultural green house at high efficiency and high capacity. <P>SOLUTION: This absorption dehumidifying air conditioning system adsorbing and removing moisture in the air to a moisture adsorbing liquid D by bringing a wet air into contact with the moisture adsorbing liquid D in the green house 24 comprises a moisture adsorbing liquid heat exchange unit 1 and a condensing heat exchange unit 26. the moisture adsorbing liquid heat exchanger 1 is a first exhaust heat recovery means to perform the latent heat recovery of the moisture adsorbing liquid D after heating and concentrating. The condensing heat exchange unit 26 is a second exhaust heat recovery means to perform the latent heat recovery of steam 6 evaporated from the moisture adsorbing liquid D in heating and concentrating. Also, the system comprises a humidifying unit 23 for humidifying the dehumidified air to generate cool air by the heat of vaporization thereof. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、農業用の温室などの多湿の環境を改善するために使用される除湿装置に関し、とくに吸湿液を利用した吸収式除湿装置を備えた温室用空調システムに関するものである。   The present invention relates to a dehumidifying device used to improve a humid environment such as an agricultural greenhouse, and more particularly to a greenhouse air conditioning system including an absorption dehumidifying device using a moisture absorbing liquid.

従来、農業用温室等の除湿手段として、フロンガスを用いた冷凍機による冷却式除湿機が多用されてきた。これは湿った空気をその露点温度以下の温度まで冷却することにより、空気中の水分を結露させて除去するものである。他にも空気中に含まれる水蒸気を多孔質の固体に吸着させて除湿する固体吸着法もある。   Conventionally, as a dehumidifying means for an agricultural greenhouse or the like, a cooling dehumidifier using a refrigerator using chlorofluorocarbon has been frequently used. In this method, moisture in the air is condensed and removed by cooling the moist air to a temperature below its dew point temperature. In addition, there is a solid adsorption method in which water vapor contained in the air is adsorbed on a porous solid to dehumidify it.

しかしながら、冷凍機を用いる方法では、処理する空気の温度が水の凍結温度に近づくに伴い除湿能力が著しく低下する。また、固体吸着材を用いる方法では、その加熱再生に高温の空気を用いるが、エネルギー利用効率が悪いこと、吸着材が長期間の反復使用に耐えられないといった難点が指摘されている。そこで、所定の温度で加熱再生できる吸湿液(例えば、トリエチレングリコール等)を用い、気液接触により除湿する手段を備え、これをバーナで加熱し、バーナの排熱を利用して、凝縮器から送られてくる空気を加熱し、温風を得る熱交換器を備え、10℃〜20℃の比較的低温度でも高い除湿能力を得ることができる温風暖房装置が提案されている(例えば、特許文献1参照。)。   However, in the method using a refrigerator, the dehumidifying ability is significantly lowered as the temperature of the air to be processed approaches the freezing temperature of water. In the method using a solid adsorbent, high-temperature air is used for heating and regeneration, but it has been pointed out that the energy utilization efficiency is poor and the adsorbent cannot withstand repeated use over a long period of time. Therefore, a hygroscopic liquid (for example, triethylene glycol) that can be heated and regenerated at a predetermined temperature is provided, and a means for dehumidification is provided by gas-liquid contact. The condenser is heated by a burner, and the exhaust heat of the burner is used. There has been proposed a warm air heating device that includes a heat exchanger that heats the air sent from and obtains warm air and can obtain a high dehumidifying capacity even at a relatively low temperature of 10 ° C. to 20 ° C. (for example, , See Patent Document 1).

特公平5−57491号公報(第2頁−第3頁、第1図)Japanese Examined Patent Publication No. 5-57491 (2nd page-3rd page, Fig. 1)

本発明は、上記のような吸湿液を利用した温室用除湿装置の除湿効率を更に高めることができるばかりでなく、暖房あるいは冷房装置としての運用も可能な温室用空調システムを提供するものである。   The present invention provides a greenhouse air conditioning system that not only can further improve the dehumidification efficiency of a greenhouse dehumidifier using the above-described moisture absorbent, but can also be used as a heating or cooling device. .

そこで本発明は、温室内の湿潤空気と吸湿液とを接触させ、空気中の水分を吸湿液に吸着除去するようにされた吸収式除湿手段を有する温室用空調システムであって、除湿に使用した後の吸湿液により、加熱濃縮後の吸湿液の顕熱回収を行なう第1の排熱回収手段を設けると共に、加熱濃縮する際に吸湿液から蒸発する水蒸気の潜熱回収を行なう第2の排熱回収手段を設けたことを第1の特徴とする。   Accordingly, the present invention is a greenhouse air conditioning system having an absorption type dehumidifying means that makes wet air and a hygroscopic liquid in a greenhouse come into contact with each other and adsorbs and removes moisture in the air to the hygroscopic liquid, and is used for dehumidification A first exhaust heat recovery means for recovering the sensible heat of the hygroscopic liquid after heating concentration is provided by the hygroscopic liquid after the heating, and a second exhaust for recovering the latent heat of water vapor evaporated from the hygroscopic liquid during the heat concentration. The first feature is that a heat recovery means is provided.

本発明の効果は次のとおりである。
(1)バーナにより加熱された吸湿液から蒸発・分離した水蒸気を、気液接触器より送られてきた除湿空気で冷却し、凝縮させる凝縮器を備えたことにより、水蒸気が有する潜熱と顕熱を除湿空気の加温に利用することが可能となる。
(2)凝縮器で凝縮させた水を、凝縮水受け、内部還流口及び凝縮水排出口に可変的に分岐・導出する切り換えバルブとからなる吸湿液の濃度調整手段を備えたことにより、きめ細かな除湿能力の制御を実現することが可能となる。また、吸湿液の過度の加熱を防止して、吸湿液の耐久性を向上することが可能となる。
(3)気液接触器より送られてくる除湿空気で加熱再生された吸湿液を冷却する放熱器を備えたことにより、加熱再生された除湿液が有する顕熱を除湿空気の加温に利用することが可能となる。
以上により、本発明の除湿機能を有する温風暖房装置は、暖房と除湿とを同時に必要とする加温ハウス等の省エネルギー化と植物等の病害予防に有効である。
The effects of the present invention are as follows.
(1) By providing a condenser that cools and condenses the water vapor evaporated and separated from the hygroscopic liquid heated by the burner with the dehumidified air sent from the gas-liquid contactor, the latent heat and sensible heat of the water vapor Can be used for heating dehumidified air.
(2) Finely adjust the concentration of hygroscopic liquid with a condensate receiver, and a switching valve that variably branches and leads water to the internal reflux port and the condensed water discharge port. It is possible to realize a proper control of the dehumidifying capacity. In addition, excessive heating of the hygroscopic liquid can be prevented, and the durability of the hygroscopic liquid can be improved.
(3) By providing a radiator that cools the moisture-absorbing liquid heated and regenerated with the dehumidified air sent from the gas-liquid contactor, the sensible heat of the heat-regenerated dehumidifying liquid is used to heat the dehumidified air. It becomes possible to do.
As described above, the hot air heating apparatus having the dehumidifying function of the present invention is effective for energy saving of a heating house or the like that requires heating and dehumidification at the same time and prevention of diseases such as plants.

そこで、低温度領域での除湿特性の改善を目的に、低温度でも凍結することなく、除湿性能を維持できる吸湿式の除湿方法を採用した。
まず、除湿に要するエネルギーコストの低減法として、
第1に除湿器から輸送されてくる使用済みの吸湿液と加熱濃縮済みの高温の吸湿液を吸湿液熱交換器により熱交換し、使用済み吸湿液の昇温と濃縮済み吸湿液の冷却を行なう。すなわち、使用済み吸湿液の昇温は排熱回収・省エネであり、濃縮済み吸湿液を冷却・低温化することにより吸湿液の輸送機器、フィルター・ポンプ系の低価格化・簡素化を可能とした。
Therefore, in order to improve the dehumidification characteristics in the low temperature region, a moisture absorption dehumidification method that can maintain the dehumidification performance without freezing even at low temperatures was adopted.
First, as a method of reducing the energy cost required for dehumidification,
First, heat exchange is performed between the used hygroscopic liquid transported from the dehumidifier and the heated and concentrated high-temperature hygroscopic liquid using the hygroscopic liquid heat exchanger, and the used hygroscopic liquid is heated and the concentrated hygroscopic liquid is cooled. Do. In other words, the temperature rise of the used hygroscopic liquid is exhaust heat recovery and energy saving, and by cooling and lowering the temperature of the concentrated hygroscopic liquid, it is possible to reduce the price and simplify the hygroscopic liquid transport equipment and the filter / pump system. did.

また、昇温した使用済み吸湿液は凝縮熱交換ユニットにおいて、吸湿液加熱濃縮装置からの高温の水蒸気と熱交換し、更に昇温される。そして、使用済み吸湿液の水の一部は沸騰し、吸湿液加熱濃縮装置内でフラッシュ蒸発する。つまり、吸湿液加熱濃縮装置からの水蒸気の熱回収を行ない、大幅な省エネを達成することを可能とした。   Further, the used hygroscopic liquid whose temperature has been raised is subjected to heat exchange with high-temperature steam from the hygroscopic liquid heating and concentrating device in the condensation heat exchange unit, and further heated. Then, part of the water of the used hygroscopic liquid boils and flashes and evaporates in the hygroscopic liquid heating concentration apparatus. In other words, the heat recovery of the water vapor from the hygroscopic liquid heating and concentrating device was performed, thereby making it possible to achieve significant energy savings.

さらに、大容量分散装置への拡張性を可能とした。すなわち、簡易に貯蔵できる石油類の燃焼熱を主な熱源としており、大容量の吸湿液加熱装置の製作が可能であること、吸湿液の配管を行なうだけで複数の吸収式除湿器を運用可能であることなどから、大型温室などへの適用を可能とした。   In addition, it is possible to expand to a large capacity dispersion device. That is, the main heat source is the combustion heat of petroleum that can be stored easily, it is possible to manufacture a large-capacity moisture absorption liquid heating device, and it is possible to operate multiple absorption dehumidifiers by simply piping the moisture absorption liquid Therefore, it was possible to apply it to large greenhouses.

さらにまた、除湿空気を利用した簡易冷房が実現可能である。多量の除湿空気を製造し、これに効率的に加湿することにより、低温度の空気を製造・活用することを可能とした。   Furthermore, simple cooling using dehumidified air can be realized. By producing a large amount of dehumidified air and efficiently humidifying it, it was possible to manufacture and utilize low-temperature air.

本発明では、吸湿液(例えば、トリエチレングリコール液、塩化カルシウム水溶液等)を利用した吸収式除湿装置により、温室内の湿った空気と吸湿液とを接触させ空気中の水分を吸湿液に吸着させて除去するが、吸湿液の除湿能力を維持・制御するために、吸水して希釈され濃度が低下した吸湿液を加熱し、吸着した水分を蒸発・分離させて再度濃縮している。   In the present invention, moisture in the greenhouse is adsorbed to the moisture absorbing liquid by contacting the humid air in the greenhouse with the moisture absorbing liquid using a moisture absorbing liquid (for example, triethylene glycol liquid, calcium chloride aqueous solution, etc.). However, in order to maintain and control the dehumidifying ability of the hygroscopic liquid, the hygroscopic liquid diluted with water and diluted to reduce the concentration is heated, and the adsorbed water is evaporated and separated to be concentrated again.

この吸湿液の加熱濃縮過程の省エネルギー化のために、吸収式除湿装置で使用された後の低濃度及び低温の吸湿液と、吸湿液加熱器により加熱され高濃度及び高温の吸湿液とを吸湿液熱交換器で熱交換し、吸収式除湿装置で使用された後の吸湿液を加熱する。すなわち、除湿に使用した後、温度が低下した後の吸湿液でもって加熱濃縮された後の高温の吸湿液の顕熱回収を行なう。   In order to save energy during the heat-concentration process of this moisture absorption liquid, it absorbs the low-concentration and low-temperature moisture absorption liquid after being used in the absorption dehumidifier and the high-concentration and high-temperature moisture absorption liquid heated by the moisture absorption liquid heater. Heat is exchanged with a liquid heat exchanger, and the hygroscopic liquid after being used with the absorption dehumidifier is heated. That is, after use for dehumidification, sensible heat recovery is performed on the high-temperature hygroscopic liquid after being heated and concentrated with the hygroscopic liquid after the temperature is lowered.

さらに、こうして吸湿液熱交換器で熱交換され加熱された吸湿液と、吸湿液加熱器により加熱され吸湿液から蒸発・分離された水蒸気と熱交換させて加熱する。すなわち、温室の除湿に使用した後の吸湿液でもって加熱濃縮した後の吸湿液から蒸発した水蒸気の潜熱回収を行なう。以上、これら二つの排熱回収手段により温室用空調システムの省エネルギー化を図ることができ、運用コストを大幅に削減できる。   Further, heat is exchanged between the hygroscopic liquid heated and exchanged in the hygroscopic liquid heat exchanger in this way, and the water vapor evaporated and separated from the hygroscopic liquid heated by the hygroscopic liquid heater and heated. That is, the latent heat recovery of water vapor evaporated from the moisture absorbent after being heated and concentrated with the moisture absorbent after being used for dehumidification of the greenhouse is performed. As described above, energy saving of the greenhouse air conditioning system can be achieved by these two exhaust heat recovery means, and the operation cost can be greatly reduced.

以下に、本発明の実施の形態を図面に示す実施例に基づいて説明する。
図1は本発明に係る吸湿式除湿空調システムの一実施例を模式的に示す概略構成図である。
Hereinafter, embodiments of the present invention will be described based on examples shown in the drawings.
FIG. 1 is a schematic configuration diagram schematically showing an embodiment of a moisture absorption and dehumidification air conditioning system according to the present invention.

本発明の吸収式除湿システムでは、吸湿液Dに湿った温室内空気を接触させて、空気に含有する水分を吸収除去するが除湿器の機能を維持あるいは制御するためには、濃度が低下した吸湿液D(例えば、トリエチレングリコール水溶液、塩化カルシウム水溶液など)が、昇温して吸収した水分を蒸発・分離・濃縮する必要がある。
この吸収液Dの加熱濃縮過程の省ネルギー手段として、吸湿液利用除湿器14で使用して濃度が低下した低温度の吸湿液Dを、吸湿液熱交換ユニット26で熱交換して昇温させる。また、使用済み吸収液Dは、凝縮熱交換ユニット26の吸湿液加熱ユニット25内で発生した高温度の水蒸気(約140℃)と熱交換し、使用済み吸湿液Dに含まれる水を沸騰させる。すなわち、加熱濃縮過程で分離した水蒸気の潜熱回収を行なう。この2タイプの排熱回収により本システムの運用コストを大幅に低減できる。
In the absorption type dehumidification system of the present invention, the moisture in the greenhouse is brought into contact with the moisture absorbing liquid D to absorb and remove moisture contained in the air, but the concentration has decreased to maintain or control the function of the dehumidifier. Moisture absorption liquid D (for example, triethylene glycol aqueous solution, calcium chloride aqueous solution, etc.) needs to evaporate / separate / concentrate the water absorbed by heating.
As a means of saving energy in the process of heating and concentrating the absorbent D, the low-temperature hygroscopic liquid D having a reduced concentration used in the hygroscopic dehumidifier 14 is heat-exchanged by the hygroscopic heat exchange unit 26 to raise the temperature. . Further, the used absorbent D exchanges heat with high-temperature water vapor (about 140 ° C.) generated in the hygroscopic liquid heating unit 25 of the condensation heat exchange unit 26 to boil the water contained in the used hygroscopic liquid D. . That is, latent heat recovery of water vapor separated in the heating and concentration process is performed. With these two types of exhaust heat recovery, the operating cost of this system can be greatly reduced.

図1において、温室24内には、吸湿液利用除湿器14が設置されている。吸湿液利用除湿器14は、吸湿液D(トリエチレングリコール等)を利用して温室内の湿った空気と吸湿液Dとを接触させ空気中の水分を吸湿液Dに吸着させて除去するものである。吸湿液Dはポンプ15から滴下器16で熱交換器17に滴下される。ここで吸入空気(温室内湿潤空気)MAと接触し、水分を吸収した後、吸湿液利用除湿器14の底部に貯留し、吸湿液再生装置(吸湿液加熱再生装置)26に導入される。   In FIG. 1, a hygroscopic liquid dehumidifier 14 is installed in a greenhouse 24. The moisture absorbing liquid dehumidifier 14 uses the moisture absorbing liquid D (triethylene glycol or the like) to contact the moist air in the greenhouse with the moisture absorbing liquid D to adsorb moisture in the air to the moisture absorbing liquid D and remove it. It is. The hygroscopic liquid D is dropped from the pump 15 to the heat exchanger 17 by the dropping device 16. Here, after making contact with the intake air (humid air in the greenhouse) MA and absorbing moisture, it is stored in the bottom of the dehumidifier 14 using the hygroscopic liquid, and is introduced into the hygroscopic liquid regenerator (hygroscopic liquid heating regenerator) 26.

一方、吸入空気MAは、吸湿液利用除湿器14内の空気冷却用熱交換器17で除湿され、気液分離用フィルター18を介して乾いた空気となり、送風機19から温室24内に排出されると共に、吸湿液利用除湿器14の底部に貯留した吸湿後の吸湿液Dはポンプ13でもって吸湿液再生装置(吸湿液加熱再生装置)26に導入される。   On the other hand, the intake air MA is dehumidified by the air cooling heat exchanger 17 in the hygroscopic liquid dehumidifier 14, becomes dry air through the gas-liquid separation filter 18, and is discharged from the blower 19 into the greenhouse 24. At the same time, the moisture absorption liquid D after moisture absorption stored in the bottom of the moisture absorption liquid dehumidifier 14 is introduced into the moisture absorption liquid regeneration device (moisture absorption liquid heating regeneration device) 26 by the pump 13.

吸湿液再生装置26の吸湿液加熱ユニット25では、バーナー8の熱を受けて吸湿液Dを所定の温度に加熱すると、吸湿液Dは沸騰し、吸湿液Dに吸着された水分が水蒸気6となって気化する。水蒸気6は、凝縮通路2内で複数に屈曲して設けられた吸湿液滴下ノズル3の管路3aを流通する冷めた吸湿液Dによって冷却され、凝縮し液化すると同時に管路3aを流通する冷めた吸湿液Dは加温される。ここで生じた凝縮水Vは、封水式の凝縮水貯留タンク7に貯留される。また、除湿空気の湿度の制御は、吸湿液Dの濃度、ポンプ15の流量及び送風機19の風量によって制御される。
尚、吸湿液Dの濃度調節は、凝縮水Vの流出方向(図示しない内部還流口方向または凝縮水排出口)を変えることで実行可能である。また、温風温度とその風量は、送風機19とバーナ8によって制御する。
In the hygroscopic liquid heating unit 25 of the hygroscopic liquid regeneration device 26, when the hygroscopic liquid D is heated to a predetermined temperature by receiving heat from the burner 8, the hygroscopic liquid D boils, and the moisture adsorbed by the hygroscopic liquid D is converted to the water vapor 6. Become vaporized. The water vapor 6 is cooled by the cooled hygroscopic liquid D flowing through the pipe line 3a of the lower moisture-absorbing droplet nozzle 3 provided to be bent in the condensing passage 2, condensed and liquefied, and at the same time cooled through the pipe line 3a. The hygroscopic liquid D is heated. The condensed water V produced here is stored in a sealed-type condensed water storage tank 7. Further, the humidity of the dehumidified air is controlled by the concentration of the moisture absorbing liquid D, the flow rate of the pump 15 and the air volume of the blower 19.
The concentration adjustment of the hygroscopic liquid D can be performed by changing the flow direction of the condensed water V (the direction of the internal reflux port or the condensed water discharge port not shown). The hot air temperature and the air volume are controlled by the blower 19 and the burner 8.

本発明装置の作用は次のとおりである。
バーナ8の燃焼熱により加熱された吸湿液Dは、吸湿液Dの温度に対応した含有水分濃度になるまで、吸湿した水分を蒸発・分離する。このとき発生する水蒸気6は、吸湿液加熱器25の上部にある凝縮器3まで吸湿液加熱ユニット25内部を上昇し、冷却される。この吸湿液滴下ノズル(凝縮器)3は、その管3a内を除湿器14で使用された後の吸湿液Dが流れ、外部は水蒸気6と接触しており、水蒸気6が有する潜熱と顕熱とを、凝縮器3の管壁から伝熱して吸湿液Dを加温する。
The operation of the device of the present invention is as follows.
The moisture absorption liquid D heated by the combustion heat of the burner 8 evaporates and separates the moisture absorbed until the moisture content concentration corresponding to the temperature of the moisture absorption liquid D is reached. The water vapor 6 generated at this time rises inside the hygroscopic liquid heating unit 25 to the condenser 3 at the top of the hygroscopic liquid heater 25 and is cooled. In this moisture-absorbing droplet lower nozzle (condenser) 3, the moisture-absorbing liquid D after being used in the dehumidifier 14 flows through the inside of the tube 3 a, the outside is in contact with the water vapor 6, and the latent heat and sensible heat that the water vapor 6 has. Is transferred from the tube wall of the condenser 3 to heat the hygroscopic liquid D.

凝縮器3で冷却され、凝縮した凝縮水Vは自然落下により、凝縮器3の下方にある凝縮水貯留タンク7に集められる。この凝縮水Vは、とくに図示しないが、切り換えバルブ等によって内部還流口や凝縮水排出口へと吸湿液Dの条件等に合せて、可変的に分岐・導出される。例えば、吸湿液濃度が設定よりも高い時は内部還流口へ凝縮水を流す。また、吸湿液の濃度を高くして、除湿能力を増加する必要がある場合は、凝縮水排出口へ導出して、吸湿液の濃度を高く保持し、使用状況に合致した吸湿液濃度を制御する。   The condensed water V cooled and condensed by the condenser 3 is collected in a condensed water storage tank 7 below the condenser 3 by natural fall. Although not particularly shown, this condensed water V is variably branched and led out to the internal reflux port and the condensed water discharge port according to the conditions of the hygroscopic liquid D by a switching valve or the like. For example, when the concentration of the hygroscopic liquid is higher than the setting, condensed water is allowed to flow to the internal reflux port. In addition, if it is necessary to increase the concentration of the hygroscopic liquid and increase the dehumidifying capacity, the concentration of the hygroscopic liquid is maintained at a high level by controlling the concentration of the hygroscopic liquid in accordance with the usage conditions. To do.

加熱再生された吸湿液Dは、高い温度を有しており、冷却する必要がある。この吸湿液を気液接触器から送られてくる除湿空気によって冷却するのが放熱器である。放熱器では、加熱再生された吸湿液を冷却する作用と、除湿空気を加温する2つの作用がある。   The hygroscopic liquid D regenerated by heating has a high temperature and needs to be cooled. It is a radiator that cools this moisture absorption liquid with dehumidified air sent from the gas-liquid contactor. In the radiator, there are two actions of cooling the hygroscopic liquid regenerated by heating and heating the dehumidified air.

さらに、高濃度の吸湿液Dを吸湿液加熱ユニット26内に設置した吸湿液滴下ノズル3からメッシュフィルター4滴下される。そして、加熱された高温の吸湿液Dは、気液分離フィルター5に噴射され水蒸気6のフラッシュ現象を呈し、吸湿液Dに含まれる一部の水は気化・分離され、その水蒸気は連通管20を通過して凝縮熱交換ユニット26で冷却され凝縮水Vとなり、水封式凝縮水貯留タンク7を介して外部に排出される。尚、図中11は液面計である。
一方、ある程度水分が蒸発した吸湿液部分(トリエチレングリコール等)は吸湿液加熱ユニット25へ流下し、バーナー8により所定の温度まで加熱され、水蒸気6を分離しつつ、所定の濃度まで加熱濃縮される。濃縮された吸湿液Dは流下管9を通って、吸湿液熱交換ユニット1へ流下し、使用済みの低濃度で低温度の吸湿液Dとなる。
Further, the high-concentration hygroscopic liquid D is dropped from the hygroscopic liquid droplet lower nozzle 3 installed in the hygroscopic liquid heating unit 26. The heated high-temperature moisture absorption liquid D is jetted to the gas-liquid separation filter 5 and exhibits a flash phenomenon of the water vapor 6, and a part of the water contained in the moisture absorption liquid D is vaporized and separated. And is condensed by the condensation heat exchange unit 26 to become condensed water V, which is discharged to the outside through the water-sealed condensed water storage tank 7. In the figure, 11 is a level gauge.
On the other hand, the hygroscopic liquid portion (triethylene glycol or the like) in which water has evaporated to some extent flows down to the hygroscopic liquid heating unit 25 and is heated to a predetermined temperature by the burner 8, and is heated and concentrated to a predetermined concentration while separating the water vapor 6. The The concentrated hygroscopic liquid D flows down to the hygroscopic liquid heat exchange unit 1 through the flow down pipe 9, and becomes the used low concentration and low temperature hygroscopic liquid D.

更に、この吸湿液Dはポンプ10を用いて、吸湿液冷却装置27の水冷ユニット22で冷却用水Wを冷却し、温室24等に設置した吸湿液利用除湿器14へ輸送される。すなわち、吸湿液利用除湿器14は、温室24内から吸引した多湿の空気と吸湿液Dとを気液接触する手段16と、空気及び吸湿液Dを冷却する手段17と、飛散した吸湿液Dと空気とを気液分離する手段18と、送風手段19及び除湿した空気を加湿し気化熱により低温にする手段23とから構成されている。   Further, the moisture absorbing liquid D is cooled by the water cooling unit 22 of the moisture absorbing liquid cooling device 27 using the pump 10 and transported to the moisture absorbing liquid dehumidifier 14 installed in the greenhouse 24 or the like. That is, the dehumidifier 14 using the hygroscopic liquid is composed of means 16 for bringing the humid air sucked from the greenhouse 24 into contact with the hygroscopic liquid D, means 17 for cooling the air and the hygroscopic liquid D, and the scattered hygroscopic liquid D. And a means 18 for separating the air and the air, a blower means 19 and a means 23 for humidifying the dehumidified air and lowering the temperature by heat of vaporization.

吸湿液輸送量、送風量、除湿量、加湿量などのシステム運用制御装置は任意に設定できることとする。濃度が低下し除湿性能が落ちた吸湿液Dは再び加熱濃縮するために、吸湿液加熱ユニット26へ返送する。また、吸湿液利用除湿器14は液滴飛散が無く、気液接触効率の高い気液接触法、例えば流下液膜法、液滴スプレー法、ハニカムコア法、回転式の保水性ベルト法などを採用して、コンパクトで低コスト化する。   System operation control devices such as the amount of hygroscopic liquid transport, the amount of air blown, the amount of dehumidification, and the amount of humidification can be arbitrarily set. The hygroscopic liquid D having a reduced concentration and dehumidifying performance is returned to the hygroscopic liquid heating unit 26 in order to be concentrated again by heating. Further, the moisture absorbent dehumidifier 14 does not scatter liquid droplets and has a high gas-liquid contact efficiency such as a falling liquid film method, a droplet spray method, a honeycomb core method, a rotary water retention belt method, and the like. Adopted, compact and low cost.

本発明の温室用除湿装置は、処理する空気の温度が10℃程度の比較的低温度であっても、除湿能力が低下しない吸収除湿の原理を用いるもので、
(1)低温度域での除湿性能の改善される。
(2)除湿に要するエネルギーコストが低減できる。
(3)大容量分散装置への拡張性を図ることができる。
(4)除湿空気を利用した簡易冷房の実現が可能になる。
という利点がある。
そこで、本システムを加湿・除湿装置として運転する場合、温室内に設置した湿度センサーに任意の湿度に保つことができる。この際、吸湿液及び空気冷却用熱交換ユニットは停止しておく。一方、本システムを冷房装置として用いる場合は、吸湿液及び空気冷却用熱交換ユニットを運転し、できるだけ低温度・低湿度の空気を作り、加湿器へと導き、超音波加湿器や微細スプレーノズルなどを用いて加湿し、その気化熱により低温空気を得る。そして、その低温空気をダクト等により植物等の低温空調に活用する。
The greenhouse dehumidifier of the present invention uses the principle of absorption dehumidification that does not decrease the dehumidifying capacity even if the temperature of the air to be treated is a relatively low temperature of about 10 ° C.
(1) The dehumidifying performance is improved in a low temperature range.
(2) The energy cost required for dehumidification can be reduced.
(3) Expandability to a large capacity dispersion apparatus can be achieved.
(4) Simple cooling using dehumidified air can be realized.
There is an advantage.
Therefore, when the present system is operated as a humidifying / dehumidifying device, the humidity sensor installed in the greenhouse can be kept at an arbitrary humidity. At this time, the hygroscopic liquid and the air cooling heat exchange unit are stopped. On the other hand, when this system is used as a cooling device, it operates a heat exchange unit for moisture absorption liquid and air cooling, creates air with as low temperature and low humidity as possible, leads it to the humidifier, ultrasonic humidifier and fine spray nozzle Humidity is used, and low temperature air is obtained by the heat of vaporization. The low-temperature air is used for low-temperature air conditioning of plants and the like through ducts and the like.

本発明に係る吸湿式除湿空調システムの一実施例を模式的に示す概略構成図である。It is a schematic structure figure showing typically one example of a moisture absorption dehumidification air-conditioning system concerning the present invention.

符号の説明Explanation of symbols

1 吸湿液再生ユニット
2 凝結通路
3 吸湿液滴下ノズル
3aノズル管路
4 メッシュフィルター
5 気液分離フィルター
6 水蒸気
7 凝結水貯留タンク
8 バーナー
9 吸湿液流下管
10フィルター付ポンプ
11液面計
12送風ファン
13フィルター付ポンプ
14吸湿液利用除湿装置
15フィルター付ポンプ
16滴下器
17空気冷却用熱交換器
18気液分離用フィルター
19送風機
20冷却水貯留タンク
21フィルター付ポンプ
22水冷ユニット
23加湿ユニット
24温室
25吸湿液加熱ユニット
26吸湿液再生装置(吸湿液加熱再生装置)
DESCRIPTION OF SYMBOLS 1 Hygroscopic liquid reproduction | regeneration unit 2 Condensation passage 3 Hygroscopic droplet lower nozzle 3a Nozzle pipe line 4 Mesh filter 5 Gas-liquid separation filter 6 Water vapor 7 Condensed water storage tank 8 Burner 9 Hygroscopic liquid lower pipe 10 Filtered pump 11 Liquid level gauge 12 Blower fan 13 Pump with filter 14 Dehumidifying device using hygroscopic liquid 15 Pump with filter 16 Dropper 17 Air cooling heat exchanger 18 Gas-liquid separation filter 19 Blower 20 Cooling water storage tank 21 Pump with filter 22 Water cooling unit 23 Humidification unit 24 Greenhouse 25 Hygroscopic liquid heating unit 26 Hygroscopic liquid regeneration device (Hygroscopic liquid heating regeneration device)

Claims (1)

温室内の湿潤空気と吸湿液とを接触させ、空気中の水分を吸湿液に吸着除去するようにされた吸収式除湿手段を有する温室用空調システムであって、除湿に使用した後の吸湿液により、加熱濃縮後の吸湿液の顕熱回収を行なう第1の排熱回収手段を設けると共に、加熱濃縮する際に吸湿液から蒸発する水蒸気の潜熱回収を行なう第2の排熱回収手段を設けたことを特徴とする吸湿式除湿空調システム。   A greenhouse air conditioning system having an absorption-type dehumidifying means in which wet air in a greenhouse is brought into contact with a hygroscopic liquid and moisture in the air is adsorbed and removed by the hygroscopic liquid, and the hygroscopic liquid after being used for dehumidification The first exhaust heat recovery means for recovering the sensible heat of the moisture absorption liquid after heating concentration is provided, and the second exhaust heat recovery means for recovering the latent heat of water vapor evaporated from the moisture absorption liquid during the heat concentration is provided. A moisture-absorbing and dehumidifying air conditioning system.
JP2004039117A 2004-02-17 2004-02-17 Absorption type dehumidification air conditioning system Expired - Fee Related JP4423499B2 (en)

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