JP2000283662A - Falling liquid film type heat exchanger - Google Patents
Falling liquid film type heat exchangerInfo
- Publication number
- JP2000283662A JP2000283662A JP11091148A JP9114899A JP2000283662A JP 2000283662 A JP2000283662 A JP 2000283662A JP 11091148 A JP11091148 A JP 11091148A JP 9114899 A JP9114899 A JP 9114899A JP 2000283662 A JP2000283662 A JP 2000283662A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- heat transfer
- heat exchanger
- liquid
- dropped
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/18—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by applying coatings, e.g. radiation-absorbing, radiation-reflecting; by surface treatment, e.g. polishing
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、吸収冷温水機の吸
収器或いは蒸発器として用いられる流下液膜式熱交換器
に関する。より詳細には、本発明は伝熱管、伝熱プレー
トの濡れ性を向上出来るように改良された散布管を有す
る流下液膜式熱交換器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a falling film heat exchanger used as an absorber or an evaporator of an absorption chiller / heater. More specifically, the present invention relates to a falling film heat exchanger having a heat transfer tube and a distribution tube improved so as to improve the wettability of a heat transfer plate.
【０００２】[0002]
【従来の技術】図６において、全体を符号１で示すの
は、従来の水平管型の流下液膜式熱交換器である。この
熱交換器１は、所謂「トレイ型」の散布管２を有してお
り、該散布管２から滴下する液滴Ｄにより、その下方の
領域に位置する複数の伝熱管１２…の表面に滴下した液
体（流下液膜式熱交換器が吸収器であれば吸収溶液、蒸
発器であれば液相冷媒）が分布し、該液体と伝熱管１２
…内を流れる流体との間で熱交換が行われるのである。2. Description of the Related Art In FIG. 6, reference numeral 1 designates a conventional horizontal tube type falling liquid film heat exchanger. The heat exchanger 1 has a so-called “tray-type” scatter tube 2, and the droplets D dropped from the scatter tube 2 cause the surface of a plurality of heat transfer tubes 12 located in a region below the scatter tube 2. The dropped liquid (absorbing solution if the falling film heat exchanger is an absorber, liquid phase refrigerant if an evaporator) is distributed, and the liquid and the heat transfer tube 12 are distributed.
… Heat exchange takes place with the fluid flowing inside.
【０００３】しかし図６で示す従来技術においては、ト
レイ型の散布管２から滴下するべき液体は、該散布管２
の最下方縁部において滴下するべき液体の層（符号「Ｄ
Ｌ」で示す）を形成してしまう。そのため、散布管２か
ら滴下される液滴Ｄは、トレイ型の散布管２の下縁部に
穿設された孔（図示せず）の間隔よりも広い間隔にて発
生し、その粒径も大きくなる。However, in the prior art shown in FIG. 6, the liquid to be dropped from the tray type spray tube 2 is
Of liquid to be dropped at the lowermost edge of the
L ”). Therefore, the droplets D dropped from the spray tube 2 are generated at intervals larger than the intervals of holes (not shown) formed in the lower edge portion of the tray-type spray tube 2, and the particle size thereof is also large. growing.
【０００４】液滴Ｄの粒径が大きく、液滴Ｄ間の間隔が
広くなる結果、散布管２下方の分布管１２…の表面にお
ける当該液体の分布は、不均一となり、一様とは言えな
い状態となる。図６で示す伝熱管１２…において、多数
のドットが付された部分（符号「Ｇ」で示す領域）部分
には前記液体が分布し、符号「Ｗ」で示す領域（図６の
白い箇所）には前記液体が接触していない。そして、図
６において伝熱管１２…が領域Ｇと領域Ｗとが混在して
いることから明らかなように、伝熱管１２…の表面にお
ける濡れ性は極めて悪い。As a result of the large diameter of the droplets D and the widening of the intervals between the droplets D, the distribution of the liquid on the surface of the distribution tubes 12 below the spraying tube 2 becomes non-uniform, and can be said to be uniform. There is no state. In the heat transfer tubes 12 shown in FIG. 6, the liquid is distributed in a portion provided with a number of dots (a region indicated by reference numeral “G”), and a region indicated by a reference numeral “W” (white portion in FIG. 6). Is not in contact with the liquid. 6, the surface of the heat transfer tubes 12 has very poor wettability, as is clear from the fact that the regions G and W are mixed.
【０００５】一方、図７も従来技術を示しており、所謂
「コルゲート管タイプ」の散布管３を有しており、該散
布管３から滴下する液滴Ｄにより、その下方の領域に位
置する複数の伝熱管１２…の表面に滴下した液体（流下
液膜式熱交換器が吸収器であれば吸収溶液、蒸発器であ
れば液相冷媒）が分布し、所謂コルゲート管タイプの散
布管３を有している。On the other hand, FIG. 7 also shows a conventional technique, which has a so-called "corrugated tube type" spraying tube 3, and is located in a region below the spraying tube 3 by a droplet D dropped from the spraying tube 3. Liquid (absorbing solution if the falling film heat exchanger is an absorber, liquid phase refrigerant if an evaporator) is distributed on the surface of the plurality of heat transfer tubes 12. have.
【０００６】所謂「コルゲート管」タイプの散布管にお
いては、その表面に形成された溝（図示せず）に沿って
滴下するべき液体（吸収溶液或いは液相冷媒）の液滴が
形成されるはずである。しかし実際には、図６の場合と
同様に、散布管３の最下縁部に滴下するべき液体の層Ｄ
Ｌが形成され、滴下する液滴Ｄの間隔は散布管３に形成
された溝の間隔よりも広くなり、粒径も大きくなる。[0006] In a so-called "corrugated tube" type spray tube, a liquid droplet (absorbing solution or liquid-phase refrigerant) to be dropped should be formed along a groove (not shown) formed on the surface thereof. It is. However, in practice, as in the case of FIG. 6, the liquid layer D to be dropped on the lowermost edge of the spray tube 3
L is formed, the interval between the droplets D to be dropped is wider than the interval between the grooves formed in the scatter tube 3, and the particle size is also increased.
【０００７】その結果、散布管３下方の分布管１２…の
表面における当該液体の分布は不均一となり、一様では
なくなる。図７においても、領域Ｇ（多数のドットが付
された箇所）には前記液体が分布し、領域Ｗ（白い箇
所）には前記液体が接触していない。そして、伝熱管１
２…には領域Ｇと領域Ｗとが混在いることから明らかな
ように、伝熱管１２…の表面における濡れ性は極めて悪
い。As a result, the distribution of the liquid on the surface of the distribution tubes 12 below the distribution tube 3 becomes non-uniform and non-uniform. In FIG. 7 as well, the liquid is distributed in the area G (where many dots are attached), and the liquid is not in contact with the area W (white area). And heat transfer tube 1
As is evident from the fact that regions G and W are mixed in 2..., The wettability on the surface of the heat transfer tubes 12 is extremely poor.
【０００８】図８は、従来のプレート型の流下液膜式熱
交換器を示している。図８においても、従来の「トレイ
型」の散布管２、「コルゲート管」タイプの散布管３
（図８では、散布管を符号「２（３）」で示している）
では、液体（吸収溶液或いは液相冷媒）の滴下間隔が広
く、液滴Ｄの寸法が大きいため、散布管２（３）下方の
伝熱プレート１４は、ハッチングを付して示す領域Ｇの
みに液体が分布し、濡れ性が劣悪となる。FIG. 8 shows a conventional plate-type falling film heat exchanger. In FIG. 8 as well, the conventional “tray type” scatter pipe 2 and the “corrugated pipe” scatter pipe 3
(In FIG. 8, the scatter tube is indicated by reference numeral “2 (3)”)
In this case, since the drop interval of the liquid (the absorbing solution or the liquid-phase refrigerant) is wide and the size of the droplet D is large, the heat transfer plate 14 below the spray pipe 2 (3) is only in the region G indicated by hatching. The liquid is distributed and the wettability is poor.
【０００９】[0009]
【発明が解決しようとする課題】本発明は上述した様な
従来技術の問題点に鑑みて提案されたものであり、伝熱
管或いは伝熱プレートの濡れ性を良好にする事が出来る
様に改善された散布管を有する流下液膜式熱交換器の提
供を目的としている。SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-described problems of the prior art, and has been improved to improve the wettability of a heat transfer tube or a heat transfer plate. It is an object of the present invention to provide a falling film heat exchanger having a spraying tube.
【００１０】[0010]
【課題を解決するための手段】本発明の流下液膜式熱交
換器は、吸収冷温水機の吸収器或いは蒸発器として用い
られる流下液膜式熱交換器において、伝熱管或いは伝熱
プレートに液滴が滴下する間隔を短くし且つ液滴の寸法
を小さくするため、散布管の表面に撥水処理を施してい
る。SUMMARY OF THE INVENTION A falling film heat exchanger of the present invention is a falling film heat exchanger used as an absorber or an evaporator of an absorption chiller / heater. In order to shorten the interval at which the droplets are dropped and to reduce the size of the droplets, the surface of the spray tube is subjected to a water-repellent treatment.
【００１１】本発明の流下液膜式熱交換器の実施に際し
ては、前記散布管の表面に塗水性の良くない材料を被覆
するのが好ましい。In implementing the falling film heat exchanger of the present invention, it is preferable that the surface of the spray tube is coated with a material having poor water application.
【００１２】ここで、前記散布管はトレイ型の散布管と
して構成されていても良い。或いは、コルゲート管タイ
プの散布管として構成されていても良い。Here, the spray tube may be configured as a tray-type spray tube. Alternatively, it may be configured as a corrugated tube type spraying tube.
【００１３】かかる構成を具備する本発明の流下液膜式
熱交換器によれば、散布管に撥水処理が施されているた
め、当該散布管から滴下される液滴の滴下間隔が狭くな
り、且つ、液滴の粒径も小さくなるため、当該液滴は伝
熱管或いは伝熱プレートの表面に均一、一様に流下し
て、伝熱管或いは伝熱プレート表面の濡れ性が非常に良
好となる。According to the falling liquid film type heat exchanger of the present invention having such a configuration, since the spray tube is subjected to the water-repellent treatment, the interval between the droplets dropped from the spray tube becomes narrow. In addition, since the droplet diameter is small, the droplets uniformly and uniformly flow down on the surface of the heat transfer tube or the heat transfer plate, and the wettability of the surface of the heat transfer tube or the heat transfer plate is extremely good. Become.
【００１４】[0014]
【発明の実施の形態】以下、添付図面を参照して、本発
明の実施形態を説明する。添付図面において、同様な部
材には同様な符号が付されている。なお、図示の実施形
態においては、流下液膜式熱交換器として、吸収冷温水
機の蒸発器Ｖ−１（図４）、Ｖ−２（図５）と吸収器Ａ
−１（図４）、Ａ−２（図５）が示されている。Embodiments of the present invention will be described below with reference to the accompanying drawings. In the accompanying drawings, similar members are denoted by similar reference numerals. In the illustrated embodiment, the evaporators V-1 (FIG. 4) and V-2 (FIG. 5) of the absorption chiller / heater and the absorber A are used as the falling film heat exchanger.
-1 (FIG. 4) and A-2 (FIG. 5) are shown.
【００１５】図１は本発明の第１実施形態を示してお
り、該第１実施形態は、水平管型の吸収器Ａ−１（図４
参照）或いは蒸発器Ｖ−１（図４参照）に適用した実施
形態にかかる。全体を符号１０で示す散布管は、所謂
「トレイ型」の散布管であり、明確には図示されてはい
ないが、その下側の領域には複数の孔が穿設されてい
る。FIG. 1 shows a first embodiment of the present invention, which is a horizontal tube type absorber A-1 (FIG. 4).
) Or the embodiment applied to the evaporator V-1 (see FIG. 4). The scatter tube indicated by reference numeral 10 is a so-called "tray-type" scatter tube, which is not clearly shown, but has a plurality of holes formed in a region below the scatter tube.
【００１６】散布管１０の前記複数の孔からは、散布管
１０内を流れる液体が滴下する。図１の流下液膜式熱交
換器が吸収器Ａである場合、散布管１０から滴下するの
は吸収溶液（例えば臭化リチウム水溶液）であり、図１
の流下液膜式熱交換器が蒸発器Ｖである場合は、散布管
１０からは液相冷媒（例えば純水）が滴下する。From the plurality of holes of the spray tube 10, the liquid flowing in the spray tube 10 drops. When the falling film heat exchanger shown in FIG. 1 is the absorber A, what is dropped from the spray tube 10 is an absorbing solution (for example, an aqueous solution of lithium bromide).
When the falling liquid film type heat exchanger is the evaporator V, a liquid-phase refrigerant (for example, pure water) is dropped from the spray tube 10.
【００１７】ここで、図１の散布管１０では、穿設され
た各孔から吸収溶液の液滴Ｄが滴下する様に、撥水処理
が施されている。この撥水処理については、明確に図示
はされていないが、散布管１０に、塗水性の悪い材質を
被覆することにより行われる。塗水性の悪い材質の被覆
については、例えばシリコン塗料を塗布したり、フッ素
樹脂の焼付け塗装（加熱温度は約２００℃）を行う等の
手法により行われる。Here, the spray tube 10 of FIG. 1 is subjected to a water-repellent treatment so that the droplet D of the absorbing solution is dropped from each of the holes formed. This water-repellent treatment is not clearly shown, but is performed by coating the spray tube 10 with a material having poor water-coating properties. The coating of a material having poor water-coating properties is performed by, for example, applying a silicone paint or baking with a fluororesin (heating temperature is about 200 ° C.).
【００１８】散布管１０の下方には、複数本の伝熱管１
２…が配置されている。図１において、伝熱管１２は、
全体が符号Ｇで示す領域（多数のドットを付した領域）
となっている。これは、散布管１０に撥水処理を施した
結果、そこから滴下される液滴Ｄの滴下間隔が非常に狭
いため、液滴Ｄは伝熱管１２…の表面に均一、一様に流
下して、伝熱管１２…表面の濡れ性が非常に良好となっ
ている状態を図示したものである。換言すれば、図１に
おいて、伝熱管１２…全体を（多数のドットが付した）
領域Ｇとして示すのは、従来技術のトレイ型の流下液膜
式熱交換器を示す図６では、散布管の下方に位置する伝
熱管１２…では領域Ｇと領域Ｗ（図６で白く示す箇所）
とが混在している事との対比を示すためである。そし
て、図６で示す従来技術においては液滴Ｄが伝熱管１２
…の表面に不均一に流下しているのに比較して、図１で
示す本発明の第１実施形態では濡れ性が飛躍的に向上し
ている旨を表現している。A plurality of heat transfer tubes 1 are provided below the scatter tube 10.
2 are arranged. In FIG. 1, the heat transfer tube 12
Area indicated by reference symbol G (area with many dots)
It has become. This is because, as a result of applying the water-repellent treatment to the spray tube 10, the droplets D dropped from the spray tube 10 have very small intervals between the droplets. This shows a state in which the wettability of the surface of the heat transfer tubes 12 is very good. In other words, in FIG. 1, the entirety of the heat transfer tubes 12...
In FIG. 6 showing a tray-type falling liquid film heat exchanger of the prior art, the area G and the area W are shown in the area G and the area W (the areas shown in white in FIG. 6). )
This is to show a contrast with the fact that both are mixed. In the prior art shown in FIG.
.. Represent that the wettability is dramatically improved in the first embodiment of the present invention shown in FIG.
【００１９】図２は、本発明の第２実施形態を示してい
る。この第２実施形態は、所謂「コルゲート管」構造の
散布管２０を具備する実施形態であり、明確には図示さ
れてはいないが、その散布管２０には図面の上下方向に
形成された複数の溝が設けられている。この第２実施形
態の流下液膜式熱交換器も、例えば吸収冷温水機におけ
る水平管型の吸収器Ａ−１（図４参照）或いは蒸発器Ｖ
−１（図４参照）である。FIG. 2 shows a second embodiment of the present invention. The second embodiment is an embodiment having a so-called "corrugated tube" structure of the scatter tube 20, and although not clearly shown, the scatter tube 20 has a plurality of scatter tubes formed vertically in the drawing. Grooves are provided. The falling film heat exchanger according to the second embodiment is also a horizontal tube type absorber A-1 (see FIG. 4) or an evaporator V in an absorption chiller / heater.
-1 (see FIG. 4).
【００２０】散布管２０における前記複数の溝の下端部
からは、散布管２０内を流れる液体（図２の熱交換器が
吸収器であれば例えば臭化リチウム水溶液等の吸収溶
液：図２の熱交換器が蒸発器であれば例えば純水の様な
液相冷媒）が滴下する。図２においては、複数の溝の各
々における最下端部から滴下する液滴は、符号Ｄで示さ
れている。From the lower ends of the plurality of grooves in the spray tube 20, a liquid flowing in the spray tube 20 (for example, an absorbing solution such as a lithium bromide aqueous solution if the heat exchanger in FIG. 2 is an absorber: If the heat exchanger is an evaporator, for example, a liquid-phase refrigerant such as pure water drops. In FIG. 2, droplets dropped from the lowermost end of each of the plurality of grooves are indicated by reference symbol D.
【００２１】ここで、図２の散布管２０では、上記各溝
から吸収溶液の液滴Ｄが滴下して、液滴の滴下間隔が短
く、且つ、液滴の粒が小さくなる様に、撥水処理が施さ
れている。この撥水処理については、図１の第１実施形
態と同様である。Here, in the spray tube 20 of FIG. 2, the droplet D of the absorbing solution is dripped from each of the grooves, and the repellency is set so that the interval between the droplets is short and the droplet size is small. Water treatment is applied. This water-repellent treatment is the same as in the first embodiment in FIG.
【００２２】散布管１０の下方に配置された複数本の伝
熱管１２…は、図２においても全体が領域Ｇ（多数のド
ットを付した領域）で表現されている。散布管２０に撥
水処理を施したことにより、滴下される液滴Ｄの滴下間
隔は、散布管２０に構成された溝間の間隔と等しくな
り、非常に狭い。そのため、液滴Ｄは伝熱管１２…の表
面に均一、一様に流下して、伝熱管１２…表面の濡れ性
が非常に良好となっている状態を示している。The plurality of heat transfer tubes 12 arranged below the scatter tube 10 are also entirely represented by a region G (region with a large number of dots) in FIG. Since the spray tube 20 has been subjected to the water-repellent treatment, the interval between the droplets D to be dropped becomes equal to the interval between the grooves formed in the spray tube 20 and is very narrow. Therefore, the liquid droplets D flow down uniformly and uniformly on the surfaces of the heat transfer tubes 12..., And the wettability of the surfaces of the heat transfer tubes 12.
【００２３】特に、図７で示す従来技術で液滴Ｄが伝熱
管１２…の表面に不均一に流下している（濡れ性の良好
な領域Ｇと、濡れ性が劣悪な領域Ｗとが混在して表現さ
れている）のと比較すれば、図２で示す第２実施形態に
おいても濡れ性が飛躍的に向上しているのが明らかであ
る。In particular, in the prior art shown in FIG. 7, droplets D are flowing non-uniformly on the surface of the heat transfer tubes 12 (a region G having good wettability and a region W having poor wettability coexist. It is apparent that the wettability is dramatically improved also in the second embodiment shown in FIG.
【００２４】図３は本発明の第３実施形態を示してい
る。図１、図２は図４で示す様な水平管型の吸収器（図
４の符号Ａ１）或いは蒸発器（図４の符号Ｖ１）につい
て適用されているのに対して、図３の実施形態では、図
５で示す様なプレート型の吸収器（図５の符号Ａ−２）
或いは蒸発器（図５の符号Ｖ−２）に対して適用される
実施形態である。図３の第３実施形態において、散布管
は「トレイ型」散布管（図１：符号１０）であっても、
「コルゲート管」構造の散布管（図２：符号２０）であ
っても良い。そのため、図３では散布管に「１０（２
０）」なる符号を付しているのである。なお図３におい
て、符号１６は入口ヘッド、符号１８は出口ヘッドを示
している。FIG. 3 shows a third embodiment of the present invention. 1 and 2 are applied to a horizontal tube type absorber (reference numeral A1 in FIG. 4) or an evaporator (reference numeral V1 in FIG. 4) as shown in FIG. 4, whereas the embodiment in FIG. Then, a plate type absorber as shown in FIG. 5 (symbol A-2 in FIG. 5)
Alternatively, the present embodiment is applied to an evaporator (reference numeral V-2 in FIG. 5). In the third embodiment of FIG. 3, even if the scatter tube is a “tray type” scatter tube (FIG. 1: reference numeral 10),
Sprinkling pipes having a “corrugated pipe” structure (FIG. 2: reference numeral 20) may be used. Therefore, in FIG. 3, "10 (2
0) ". In FIG. 3, reference numeral 16 indicates an entrance head, and reference numeral 18 indicates an exit head.
【００２５】図３においては明確に示されてはいない
が、散布管１０（２０）は図１及び図２の実施形態の場
合と同様に、その表面に撥水処理が施されている。この
撥水処理については、図１に関連して説明したのと同様
である。Although not clearly shown in FIG. 3, the surface of the spray tube 10 (20) is subjected to a water-repellent treatment as in the case of the embodiment of FIGS. This water-repellent treatment is the same as that described with reference to FIG.
【００２６】表面に撥水処理が施された結果、散布管１
０（２０）から滴下する液滴１０の間隔は非常に狭くな
り、滴下される液体（例えば吸収溶液或いは液相冷媒）
は、散布管１０（２０）の下方に位置する伝熱プレート
１４の全面に亘って、均一或いは一様に分布する。な
お、図３においては、プレート１４の上半分にのみ滴下
された液体が分布している状態を示しており、該液体が
分布する範囲はハッチングが付されており、符号Ｇで示
されている。As a result of the water repellent treatment on the surface, the spray tube 1
The interval between the droplets 10 dropped from 0 (20) becomes very narrow, and the dropped liquid (for example, an absorbing solution or a liquid-phase refrigerant)
Are uniformly or evenly distributed over the entire surface of the heat transfer plate 14 located below the distribution tube 10 (20). Note that FIG. 3 shows a state in which the liquid dropped on only the upper half of the plate 14 is distributed, and a range in which the liquid is distributed is hatched, and is indicated by a symbol G. .
【００２７】伝熱プレートを有する従来技術を示す図８
においては、散布管からの滴下間隔が広いため、液滴が
大きく、ハッチングを付した液体の分布領域が狭く、濡
れ性が良くない。それと比較すれば、図３で示す第３実
施形態においても、伝熱プレート１４の濡れ性が飛躍的
に向上しているのが明らかである。FIG. 8 shows the prior art having a heat transfer plate.
In the case of, since the interval of dropping from the spray tube is wide, the droplets are large, the distribution area of the hatched liquid is narrow, and the wettability is poor. In comparison with this, it is clear that the wettability of the heat transfer plate 14 is dramatically improved also in the third embodiment shown in FIG.
【００２８】図４は、本発明を水平管型の吸収器（符号
Ａ−１側）、蒸発器（符号Ｖ−１側）に適用した状態を
示している。吸収器Ａ−１側の散布管には符号「１０Ａ
−１、２０Ａ−１」を付しており、そこからは吸収溶液
（臭化リチウム水溶液）が伝熱管１２へ滴下する。一
方、蒸発器Ｖ−１側の散布管は符号「１０Ｖ−１、２０
Ｖ−１」を付しており、下方に位置する伝熱管１２へ液
相冷媒（純水）を滴下している。FIG. 4 shows a state in which the present invention is applied to a horizontal tube type absorber (reference A-1) and an evaporator (reference V-1). The reference numeral “10A”
-1, 20A-1 ", from which an absorbing solution (aqueous lithium bromide solution) is dropped onto the heat transfer tube 12. On the other hand, the scatter pipe on the side of the evaporator V-1 is denoted by reference numeral "10V-1, 20".
V-1 ", and liquid-phase refrigerant (pure water) is dropped onto the heat transfer tube 12 located below.
【００２９】図５は、本発明をプレート型の吸収器（符
号Ａ−２側）、蒸発器（符号Ｖ−２側）に適用した状態
を示している。吸収器Ａ−１側の散布管１０Ａ−２、２
０Ａ−２から、その下方に位置する伝熱プレート１４に
対して、吸収溶液（臭化リチウム水溶液）が滴下する。
一方、蒸発器Ｖ−２側の散布管１０Ｖ−２、２０Ｖ−２
から、下方に位置する伝熱プレート１４に対して液相冷
媒（純水）が滴下している。FIG. 5 shows a state in which the present invention is applied to a plate type absorber (reference A-2 side) and an evaporator (reference V-2 side). Scattering tube 10A-2, 2 on absorber A-1 side
From 0A-2, an absorbing solution (aqueous lithium bromide solution) is dropped onto the heat transfer plate 14 located therebelow.
On the other hand, the spray tubes 10V-2 and 20V-2 on the evaporator V-2 side.
, The liquid-phase refrigerant (pure water) is dripped onto the heat transfer plate 14 located below.
【００３０】図１−図５の実施形態によれば、冷媒は溶
液は小さな液滴で均一に散布されるため、伝熱管の濡れ
性が向上し、伝熱性能が向上する。図示の実施形態を用
いて実験した際には、総括伝熱係数（Ｋ値）が、従来の
１４６３ｋｃａｌ／ｍ２ ｈ℃から、１７００ｋｃａｌ
／ｍ２ ｈ℃となった。すなわち、従来技術に比較し
て、Ｋ値が約１６％向上するという結果を得た。According to the embodiment shown in FIGS. 1 to 5, since the solution of the refrigerant is uniformly dispersed in small droplets, the wettability of the heat transfer tube is improved, and the heat transfer performance is improved. When an experiment was performed using the illustrated embodiment, the overall heat transfer coefficient (K value) was changed from the conventional 1463 kcal / m 2 h ° C. to 1700 kcal.
/ M 2 h ° C. That is, a result was obtained in which the K value was improved by about 16% as compared with the related art.
【００３１】[0031]
【発明の効果】上述した様に、本発明によれば散布管の
表面に撥水処理を施しているため、当該散布管から滴下
される液滴の滴下間隔が狭くなり、且つ、液滴の粒径も
小さくなるため、当該液滴は伝熱管或いは伝熱プレート
の表面に均一、一様に流下して、伝熱管或いは伝熱プレ
ート表面の濡れ性が非常に良好となる。そして、伝熱管
或いは伝熱プレート表面の濡れ性が非常に良好となると
いうことは、流下液膜式熱交換器における性能或いは熱
交換効率が非常に向上する事を意味する。As described above, according to the present invention, since the surface of the spray tube is subjected to the water repellent treatment, the intervals between the droplets dropped from the spray tube are reduced, and the droplets of the spray tube are reduced. Since the particle size is small, the droplets uniformly and uniformly flow down on the surface of the heat transfer tube or the heat transfer plate, and the wettability of the surface of the heat transfer tube or the heat transfer plate becomes very good. The fact that the wettability of the surface of the heat transfer tube or the heat transfer plate becomes very good means that the performance or the heat exchange efficiency of the falling film heat exchanger is greatly improved.
【図１】本発明の第１実施形態の部分正面図。FIG. 1 is a partial front view of a first embodiment of the present invention.
【図２】本発明の第２実施形態の部分正面図。FIG. 2 is a partial front view of a second embodiment of the present invention.
【図３】本発明の第３実施形態の斜視図。FIG. 3 is a perspective view of a third embodiment of the present invention.
【図４】本発明が実施される吸収冷温水機の吸収器及び
蒸発器の１例を示す斜視図。FIG. 4 is a perspective view showing an example of an absorber and an evaporator of an absorption water heater / heater in which the present invention is implemented.
【図５】本発明が実施される吸収冷温水機の吸収器及び
蒸発器の他の例を示す斜視図。FIG. 5 is a perspective view showing another example of the absorber and the evaporator of the absorption chiller / heater in which the present invention is implemented.
【図６】従来技術の部分正面図。FIG. 6 is a partial front view of a conventional technique.
【図７】図６とは別の従来技術の部分正面図。FIG. 7 is a partial front view of another prior art different from FIG. 6;
【図８】図６、図７とは別の従来技術を示す斜視図。FIG. 8 is a perspective view showing another related art different from FIGS. 6 and 7;
１…流下液膜式熱交換器 ２、３、１０、１０Ａ−１、１０Ａ−２、１０Ｖ−１、
１０Ｖ−２、２０、２０Ａ−１、２０Ａ−２、２０Ｖ−
１、２０Ｖ−２…散布管 １２…伝熱管 １４…伝熱プレート １６…入口ヘッド １８…出口ヘッド Ａ…吸収器 Ｖ…蒸発器 Ｄ…液滴 ＤＬ…滴下されるべき液の層1: falling film heat exchanger 2, 3, 10, 10A-1, 10A-2, 10V-1,
10V-2, 20, 20A-1, 20A-2, 20V-
1, 20V-2: scatter tube 12: heat transfer tube 14: heat transfer plate 16: inlet head 18: outlet head A: absorber V: evaporator D: droplet DL: layer of liquid to be dropped
Claims (4)
て用いられる流下液膜式熱交換器において、伝熱管或い
は伝熱プレートに液滴が滴下する間隔を短くし且つ液滴
の寸法を小さくするため、散布管の表面に撥水処理を施
した事を特徴とする流下液膜式熱交換器。1. A falling liquid film type heat exchanger used as an absorber or an evaporator of an absorption chiller / heater, in which the intervals at which droplets are dropped onto a heat transfer tube or a heat transfer plate are shortened and the size of the droplets is reduced. A falling liquid film heat exchanger characterized in that a water-repellent treatment has been applied to the surface of the spraying pipe.
料を被覆した請求項１の流下液膜式熱交換器。2. The falling liquid film heat exchanger according to claim 1, wherein the surface of said spray tube is coated with a material having poor water-coating properties.
構成されている請求項１、２のいずれかの流下液膜式熱
交換器。3. The falling film heat exchanger according to claim 1, wherein the spray tube is configured as a tray-type spray tube.
布管として構成されている請求項１、２のいずれかの流
下液膜式熱交換器。4. The falling film heat exchanger according to claim 1, wherein said spray tube is configured as a corrugated tube type spray tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11091148A JP2000283662A (en) | 1999-03-31 | 1999-03-31 | Falling liquid film type heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11091148A JP2000283662A (en) | 1999-03-31 | 1999-03-31 | Falling liquid film type heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000283662A true JP2000283662A (en) | 2000-10-13 |
Family
ID=14018451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11091148A Pending JP2000283662A (en) | 1999-03-31 | 1999-03-31 | Falling liquid film type heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000283662A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020006872A (en) * | 2000-07-13 | 2002-01-26 | 이명섭 | Closed Type Cooling Towers And The Designing Methods |
| JP2007255860A (en) * | 2006-03-27 | 2007-10-04 | Daikin Ind Ltd | Absorber for air-cooled absorption type refrigerating device |
| JP2007278570A (en) * | 2006-04-05 | 2007-10-25 | Daikin Ind Ltd | Air-cooled absorption type refrigerating device |
| JP2009002539A (en) * | 2007-06-19 | 2009-01-08 | Daikin Ind Ltd | Exhaust-heat driving type absorption refrigerating device |
| JP2009507975A (en) * | 2005-09-14 | 2009-02-26 | ビーエーエスエフ ソシエタス・ヨーロピア | Liquid dripping method |
| JP2009052811A (en) * | 2007-08-28 | 2009-03-12 | Daikin Ind Ltd | Exhaust heat drive-type absorption refrigerating device |
| JP2009058181A (en) * | 2007-08-31 | 2009-03-19 | Daikin Ind Ltd | Absorption type refrigerating apparatus |
| WO2011158432A1 (en) * | 2010-06-17 | 2011-12-22 | アイシン精機株式会社 | Viscous substance dilution apparatus |
| JP2013083405A (en) * | 2011-10-11 | 2013-05-09 | Kawasaki Thermal Engineering Co Ltd | Spraying device |
| CN103983046A (en) * | 2014-06-09 | 2014-08-13 | 泰山集团股份有限公司 | Wide and narrow passage plate type flooded generator and falling film absorber, and ammonia water absorption refrigerator |
| KR20210104474A (en) * | 2020-02-17 | 2021-08-25 | 엘지전자 주식회사 | Absorbed chiller |
| EP4151927A4 (en) * | 2020-05-14 | 2023-11-29 | Panasonic Intellectual Property Management Co., Ltd. | Heat exchange unit for absorption-type refrigerator, absorption-type refrigerator, and heat exchange method |
-
1999
- 1999-03-31 JP JP11091148A patent/JP2000283662A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020006872A (en) * | 2000-07-13 | 2002-01-26 | 이명섭 | Closed Type Cooling Towers And The Designing Methods |
| JP2009507975A (en) * | 2005-09-14 | 2009-02-26 | ビーエーエスエフ ソシエタス・ヨーロピア | Liquid dripping method |
| JP2007255860A (en) * | 2006-03-27 | 2007-10-04 | Daikin Ind Ltd | Absorber for air-cooled absorption type refrigerating device |
| JP2007278570A (en) * | 2006-04-05 | 2007-10-25 | Daikin Ind Ltd | Air-cooled absorption type refrigerating device |
| JP2009002539A (en) * | 2007-06-19 | 2009-01-08 | Daikin Ind Ltd | Exhaust-heat driving type absorption refrigerating device |
| JP2009052811A (en) * | 2007-08-28 | 2009-03-12 | Daikin Ind Ltd | Exhaust heat drive-type absorption refrigerating device |
| JP2009058181A (en) * | 2007-08-31 | 2009-03-19 | Daikin Ind Ltd | Absorption type refrigerating apparatus |
| WO2011158432A1 (en) * | 2010-06-17 | 2011-12-22 | アイシン精機株式会社 | Viscous substance dilution apparatus |
| JP5370589B2 (en) * | 2010-06-17 | 2013-12-18 | アイシン精機株式会社 | Viscous substance dilution device |
| US8925906B2 (en) | 2010-06-17 | 2015-01-06 | Aisin Seiki Kabushiki Kaisha | Device for diluting a viscous substance |
| JP2013083405A (en) * | 2011-10-11 | 2013-05-09 | Kawasaki Thermal Engineering Co Ltd | Spraying device |
| CN103983046A (en) * | 2014-06-09 | 2014-08-13 | 泰山集团股份有限公司 | Wide and narrow passage plate type flooded generator and falling film absorber, and ammonia water absorption refrigerator |
| KR20210104474A (en) * | 2020-02-17 | 2021-08-25 | 엘지전자 주식회사 | Absorbed chiller |
| KR102320559B1 (en) * | 2020-02-17 | 2021-11-02 | 엘지전자 주식회사 | Absorbed chiller |
| EP4151927A4 (en) * | 2020-05-14 | 2023-11-29 | Panasonic Intellectual Property Management Co., Ltd. | Heat exchange unit for absorption-type refrigerator, absorption-type refrigerator, and heat exchange method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2000283662A (en) | Falling liquid film type heat exchanger | |
| US8356658B2 (en) | Heat transfer enhancing system and method for fabricating heat transfer device | |
| CN110475465A (en) | A kind of hot-pipe system of jet hole height change | |
| JP2004085169A (en) | Heat exchanger | |
| US3229761A (en) | Spur tube with alternate oppositely directed orifices | |
| CN111670333B (en) | Latent heat exchanger chamber device | |
| CN105486123B (en) | A kind of snakelike heat exchange tube beam | |
| JPH10339591A (en) | Temperature controller utilizing heat pipe | |
| JPS60185094A (en) | Heat transfer pipe of uniform heat flow type | |
| JP2000179989A (en) | Sprinkler of absorption water cooler/heater | |
| JPH0320577A (en) | Heat-transfer tube for evaporator | |
| JPH03286990A (en) | Double pipe type open rack gasifying apparatus | |
| JPH03286991A (en) | Double pipe type open rack gasifying apparatus | |
| JP3712775B2 (en) | Plate evaporator / absorber for absorption refrigerator | |
| JP2023057341A (en) | vaporizer | |
| JPH10312943A (en) | Temperature controller | |
| CN208382936U (en) | A kind of radiator | |
| US20100032146A1 (en) | Method and arrangement for heat treatment of substrates | |
| JP2008514819A (en) | Epitaxial reactor cooling method and reactor cooled thereby | |
| EP2053334B1 (en) | Heat transfer enhancing system and method for fabricating heat transfer device | |
| JPH0245727Y2 (en) | ||
| RU2820585C1 (en) | Heat exchanger tube | |
| RU2447386C2 (en) | Device for heat transfer increase and method for this device manufacturing | |
| JPS58168859A (en) | Water sprinkler of evaporation type cooler | |
| CA2607688C (en) | Heat transfer enhancing system and method for fabricating heat transfer device |