JP3390240B2 - Heat storage device - Google Patents
Heat storage deviceInfo
- Publication number
- JP3390240B2 JP3390240B2 JP00613994A JP613994A JP3390240B2 JP 3390240 B2 JP3390240 B2 JP 3390240B2 JP 00613994 A JP00613994 A JP 00613994A JP 613994 A JP613994 A JP 613994A JP 3390240 B2 JP3390240 B2 JP 3390240B2
- Authority
- JP
- Japan
- Prior art keywords
- heat storage
- storage device
- cylindrical container
- peripheral surface
- decahydrate
- 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.)
- Expired - Fee Related
Links
Classifications
-
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Landscapes
- Central Heating Systems (AREA)
Description
【０００１】[0001]
【発明の技術分野】本発明は、蓄熱装置に関し、さらに
詳しくは、蓄熱・放熱効率に優れ、長期間繰返して使用
できる蓄熱装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat storage device, and more particularly to a heat storage device which has excellent heat storage / radiation efficiency and can be repeatedly used for a long period of time.
【０００２】[0002]
【従来の技術】室内暖房装置として、潜熱の大きい組成
物からなる蓄熱材が広く用いられている。例えば、電気
料金の安い夜間電力によって蓄熱材を加熱融解してエネ
ルギーを貯え、この蓄熱材が凝固するときに発生する凝
固熱（潜熱）を昼間の室内暖房に利用する室内暖房装置
が用いられている。2. Description of the Related Art As an indoor heating device, a heat storage material composed of a composition having a large latent heat is widely used. For example, an indoor heating device is used in which the heat storage material is heated and melted by night-time electricity with a low electricity rate to store energy, and the solidification heat (latent heat) generated when the heat storage material solidifies is used for indoor heating in the daytime. There is.
【０００３】このような蓄熱材としては、硫酸ナトリウ
ム１０水塩が知られており、さらにこの硫酸ナトリウム
１０水塩にシックナーとしてのホウ酸ナトリウム１０水
塩を配合してなる蓄熱材組成物が広く用いられている。
この硫酸ナトリウム１０水塩とホウ酸ナトリウム１０水
塩とからなる蓄熱材組成物は、理論的には約５８ｋｃａ
ｌ／ｋｇの潜熱を有しており、融解状態にあるこの蓄熱
材組成物は、凝固する際に長時間にわたって一定温度領
域で多量の熱を放出し、室内を快適な温度に保つことが
できる。As such a heat storage material, sodium sulfate decahydrate is known, and a heat storage material composition obtained by blending this sodium sulfate decahydrate with sodium borate decahydrate as a thickener is widely used. It is used.
The heat storage material composition consisting of sodium sulfate decahydrate and sodium borate decahydrate theoretically has a capacity of about 58 kca.
This heat storage material composition, which has a latent heat of 1 / kg and is in a molten state, releases a large amount of heat in a constant temperature region for a long time when solidifying, and can maintain a comfortable temperature in the room. .
【０００４】ところが硫酸ナトリウム１０水塩とホウ酸
ナトリウム１０水塩とからなる蓄熱材は、加熱融解−凝
固を多数回繰り返すと、蓄熱量が低下することがあっ
た。またこの蓄熱材は、上述のように潜熱の理論値が約
５８ｋｃａｌ／ｋｇであるが、実際には２０〜４０ｋｃ
ａｌ／ｋｇ程度の潜熱しか取り出すことができないとい
う問題点があった。However, in the heat storage material composed of sodium sulfate decahydrate and sodium borate decahydrate, the amount of stored heat may be reduced when heating, melting and coagulation are repeated many times. The theoretical value of latent heat of this heat storage material is about 58 kcal / kg as described above, but in reality, it is 20 to 40 kc.
There is a problem that only latent heat of about al / kg can be taken out.
【０００５】本発明者は、硫酸ナトリウム１０水塩とホ
ウ酸ナトリウム１０水塩とからなる蓄熱材について、よ
り多くの潜熱を取り出すべく鋭意検討したところ、凝固
時にこの蓄熱材が充分に凝固せず、固相と液相とに相分
離してしまうことがあるが、この相分離は、硫酸ナトリ
ウム１０水塩とホウ酸ナトリウム１０水塩とを完全に均
一に混合するときに起こりやすくなることを見出した。The inventor of the present invention has made earnest studies on a heat storage material composed of sodium sulfate decahydrate and sodium borate decahydrate in order to extract more latent heat. As a result, the heat storage material does not sufficiently solidify during solidification. , The solid phase and the liquid phase may be separated, but this phase separation is likely to occur when the sodium sulfate decahydrate and the sodium borate decahydrate are mixed completely uniformly. I found it.
【０００６】この知見に基づいて本発明者はさらに鋭意
検討したところ、この相分離は蓄熱材の表層部と中心部
の熱伝導率の相違により蓄熱装置の中央部で起こりやす
いことを見出すとともに、この相分離に起因する潜熱の
低下は、蓄熱材を収容する蓄熱装置の形状にも大きく左
右されることを見い出して、本発明を完成するに至っ
た。Based on this finding, the present inventor has made further diligent studies and found that this phase separation is likely to occur in the central portion of the heat storage device due to the difference in thermal conductivity between the surface layer portion and the central portion of the heat storage material. The present inventors have found that the decrease in latent heat due to this phase separation greatly depends on the shape of the heat storage device that accommodates the heat storage material, and completed the present invention.
【０００７】[0007]
【発明の目的】本発明は、上記のような従来技術に伴う
問題点を解決しようとするものであって、大きな潜熱を
取り出すことができ、しかも長期間繰返して使用できる
蓄熱装置を提供することを目的としている。SUMMARY OF THE INVENTION An object of the present invention is to solve the problems associated with the prior art as described above, and to provide a heat storage device which can take out a large latent heat and can be repeatedly used for a long period of time. It is an object.
【０００８】[0008]
【発明の概要】本発明に係る蓄熱装置は、筒状容器内
に、筒状中空芯材がほぼ同心円状に配置されており、す
なわち、該筒状容器内に、筒状容器とほほ同じ長さの筒
状中空芯材が、該筒状容器の一方端から他方端に向かっ
て該筒状容器と同心円状に延在しており、該筒状容器
と、該筒状中空芯材との間隙に硫酸ナトリウム１０水塩
とホウ酸ナトリウム１０水塩とが充填されており、該ホ
ウ酸ナトリウム１０水塩が、該筒状容器内の端面または
内周面に偏在しており、該筒状容器内周面と該筒状中空
芯材外周面との径方向距離Ｄが５〜２５ｍｍであること
を特徴としている。SUMMARY OF THE INVENTION In a heat storage device according to the present invention, a cylindrical hollow core material is arranged in a cylindrical container in a substantially concentric manner, that is, in the cylindrical container, the length is almost the same as that of the cylindrical container. Of the tubular hollow core material extends concentrically with the tubular container from one end to the other end of the tubular container, and a gap between the tubular container and the tubular hollow core material. Is filled with sodium sulfate decahydrate and sodium borate decahydrate, and the sodium borate decahydrate is unevenly distributed on the end surface or the inner peripheral surface in the cylindrical container, and the cylindrical container The radial distance D between the inner peripheral surface and the outer peripheral surface of the tubular hollow core material is 5 to 25 mm.
【０００９】本発明の好ましい態様においては、前記筒
状容器内に、硫酸ナトリウム１０水塩とホウ酸ナトリウ
ム１０水塩との合計１００体積％中、ホウ酸ナトリウム
１０水塩が０．５〜１０体積％、好ましくは１〜３体積
％の量で充填されていることが望ましい。また、前記筒
状容器の内径Ｓは２０〜６０ｍｍであり、筒状容器内周
面と中空芯材外周面の径方向距離Ｄは５〜２５ｍｍ程度
以内であり、かつ前記筒状容器の肉厚は１〜２ｍｍであ
ることが望ましい。In a preferred embodiment of the present invention, sodium borate decahydrate is 0.5 to 10 in a total of 100% by volume of sodium sulfate decahydrate and sodium borate decahydrate in the cylindrical container. It is desirable to be filled in an amount of 3% by volume, preferably 1% by volume. Further, the inner diameter S of the cylindrical container is 20 to 60 mm, the radial distance D between the inner peripheral surface of the cylindrical container and the outer peripheral surface of the hollow core is within about 5 to 25 mm, and the wall thickness of the cylindrical container. Is preferably 1 to 2 mm.
【００１０】また、前記筒状容器の外周面は、粗面化さ
れるなど伝熱面積が大きくされていることが好ましい。
このような本発明に係る蓄熱装置は、大きな潜熱を取り
出すことができ、しかも長期間繰返して使用できる。Further, it is preferable that the outer peripheral surface of the cylindrical container has a large heat transfer area such as being roughened.
Such a heat storage device according to the present invention can take out large latent heat and can be repeatedly used for a long time.
【００１１】[0011]
【発明の具体的説明】以下、本発明に係る蓄熱装置につ
いて図面に示す実施例に基づいて具体的に説明する。な
お、添付図面および以下の説明において、同一符号は、
同一部材を示す。DETAILED DESCRIPTION OF THE INVENTION A heat storage device according to the present invention will be specifically described below with reference to the embodiments shown in the drawings. In the attached drawings and the following description, the same reference numerals are used.
The same member is shown.
【００１２】図１は、本発明の一実施例に係る蓄熱装置
の縦断面図である。図２は、該蓄熱装置の［Ａ］−
［Ａ］線方向断面図である。図１に示す蓄熱装置１で
は、筒状容器２内に、筒状容器２とほぼ同じ長さの筒状
中空芯材１５が、筒状容器２と同心円状に配置されてお
り、換言すれば、筒状容器２内に、上記筒状中空心材１
５が、該筒状容器の一方端から他方端に向かって該筒状
容器と同心円状に延在しており、断面円形状の筒状容器
２と筒状中空芯材１５との間隙１１に蓄熱材３が充填さ
れている。FIG. 1 is a vertical sectional view of a heat storage device according to an embodiment of the present invention. FIG. 2 shows the [A]-of the heat storage device.
[A] FIG. In the heat storage device 1 shown in FIG. 1, a tubular hollow core material 15 having substantially the same length as the tubular container 2 is arranged in the tubular container 2 concentrically with the tubular container 2, in other words. The tubular hollow core material 1 is placed in the tubular container 2.
5 extends concentrically with the tubular container from one end to the other end of the tubular container, and in a gap 11 between the tubular container 2 having a circular cross section and the tubular hollow core material 15. The heat storage material 3 is filled.
【００１３】該筒状容器内周面９と該筒状中空芯材外周
面１３との径方向距離Ｄは、５〜２５ｍｍ、好ましくは
１０〜２０ｍｍである。この径方向距離Ｄが５ｍｍ未満
では、この筒状容器内に後述する蓄熱材を充填するのが
困難となり、また、２５ｍｍを超えると得られる蓄熱装
置の蓄熱・放熱効率が低く、該装置の耐久性が比較的短
期間に低下してしまうことがある。The radial distance D between the inner peripheral surface 9 of the cylindrical container and the outer peripheral surface 13 of the cylindrical hollow core material is 5 to 25 mm, preferably 10 to 20 mm. If this radial distance D is less than 5 mm, it will be difficult to fill the heat storage material described later in this cylindrical container, and if it exceeds 25 mm, the heat storage / heat dissipation efficiency of the heat storage device obtained will be low, and the durability of the device will be low. Sexuality may decline in a relatively short period of time.
【００１４】また、筒状容器２の内径Ｓは、通常２０〜
６０ｍｍ程度である。筒状容器２の肉厚ｔ1および筒状
中空芯材１５の肉厚ｔ2は、同一であってもよく異なっ
ていてもよいが、通常０．５〜３ｍｍ、好ましくは１〜
２ｍｍであることが望ましい。The inner diameter S of the cylindrical container 2 is usually 20 to
It is about 60 mm. Thickness t 2 of the cylindrical container wall thickness of 2 t 1 and the cylindrical hollow core 15, may be different may be identical, usually 0.5 to 3 mm, preferably 1 to
2 mm is desirable.
【００１５】この筒状容器の長さＬは、通常、５０〜
２，０００ｍｍ、好ましくは５００〜１，５００ｍｍ程
度である。このような筒状容器２の端面を含む外周面７
は、粗面化されるなど伝熱面積が大きくなっていること
が好ましく、該外周面７には、図３に示すように放熱板
８が設けられていることが好ましい。The length L of this cylindrical container is usually 50 to
It is about 2,000 mm, preferably about 500 to 1,500 mm. Outer peripheral surface 7 including the end surface of such a cylindrical container 2
Preferably has a large heat transfer area such as being roughened, and the outer peripheral surface 7 is preferably provided with a heat dissipation plate 8 as shown in FIG.
【００１６】なお、筒状容器の外周面を粗面化加工する
には、例えば、ポリプロピレン（ＰＰ）等からなる筒状
容器の外周面にセラミック材入りの塗料を塗布すればよ
い。このような筒状容器の好ましい具体例を挙げると、
図１において、該筒状容器２の外周面７が粗面化されて
おり、該筒状容器の内径Ｓは、４０ｍｍであり、該筒状
容器内周面９と該筒状中空芯材外周面１３との径方向距
離Ｄは１５ｍｍであり、肉厚ｔ1，ｔ2は２．５ｍｍであ
り、その長さＬは１２００ｍｍである。In order to roughen the outer peripheral surface of the cylindrical container, for example, a coating material containing a ceramic material may be applied to the outer peripheral surface of the cylindrical container made of polypropylene (PP) or the like. To give a preferred specific example of such a cylindrical container,
In FIG. 1, the outer peripheral surface 7 of the cylindrical container 2 is roughened, the inner diameter S of the cylindrical container is 40 mm, and the inner peripheral surface 9 of the cylindrical container and the outer peripheral surface of the cylindrical hollow core material. The radial distance D from the surface 13 is 15 mm, the wall thicknesses t 1 and t 2 are 2.5 mm, and the length L thereof is 1200 mm.
【００１７】このような筒状容器２および筒状中空芯材
１５用の材料としては、特に限定されないが、耐久性、
柔軟性があり、例えば床等に埋め込んで使用できるよう
に耐腐食性も有することが好ましく、このような材料と
しては、ポリエチレン、ポリプロピレン（ＰＰ）、アク
リル樹脂、塩化ビニル、アルミ、銅、鉄、ステンレス等
が挙げられるが、アクリル樹脂またはポリプロピレン
（ＰＰ）が好ましい。Materials for the cylindrical container 2 and the cylindrical hollow core material 15 are not particularly limited, but durability,
It is preferable that it is flexible and has corrosion resistance so that it can be embedded in a floor or the like and used. Examples of such a material include polyethylene, polypropylene (PP), acrylic resin, vinyl chloride, aluminum, copper, iron, Examples of the material include stainless steel, but acrylic resin or polypropylene (PP) is preferable.
【００１８】蓄熱材３としては、硫酸ナトリウム１０水
塩（ぼう硝，Ｎａ2ＳＯ4・１０Ｈ2Ｏ）と、核発生剤と
してのホウ酸ナトリウム１０水塩（Ｎａ2Ｂ4Ｏ7・１０
Ｈ2Ｏ，商品名：ボラックス）とが用いられる。本発明
においては、蓄熱材３として、硫酸ナトリウム１０水塩
と共に、融点が高く（６３℃）、結晶構造が硫酸ナトリ
ウム１０水塩と近似した化合物であるホウ酸ナトリウム
１０水塩を用いており、ホウ酸ナトリウム１０水塩は蓄
熱材冷却時の結晶化の核となり、硫酸ナトリウム１０水
塩の微細結晶化を促進し、過冷却現象を抑制することが
できる。As the heat storage material 3, sodium sulphate decahydrate (Glauber's salt, Na 2 SO 4 · 10H 2 O) and sodium borate decahydrate (Na 2 B 4 O 7 · 10) as a nucleating agent.
H 2 O, trade name: Borax) is used. In the present invention, sodium borate decahydrate, which is a compound having a high melting point (63 ° C.) and a crystal structure similar to that of sodium sulfate decahydrate, is used as the heat storage material 3 together with sodium sulfate decahydrate. Sodium borate decahydrate becomes a nucleus of crystallization during cooling of the heat storage material, promotes fine crystallization of sodium sulfate decahydrate, and can suppress the supercooling phenomenon.
【００１９】本発明においては、上記のホウ酸ナトリウ
ム１０水塩は、該筒状容器２内の先端部６または他端部
６Ａあるいは内周面９に偏在しているが、図１に示すよ
うに、特に、筒状容器２内の先端部６に偏在しているこ
とが好ましい。すなわち、本発明では、筒状容器２と筒
状中空芯材１５との間隙１１内に充填される硫酸ナトリ
ウム１０水塩とホウ酸ナトリウム１０水塩とは、均一に
混合して用いるのではなく、硫酸ナトリウム１０水塩は
筒状容器内の先端部６または他端部６Ａあるいは内周面
９に偏在するように充填される。In the present invention, the sodium borate decahydrate is unevenly distributed on the tip portion 6 or the other end portion 6A or the inner peripheral surface 9 in the cylindrical container 2, as shown in FIG. In particular, it is preferable that the tip portion 6 in the cylindrical container 2 is unevenly distributed. That is, in the present invention, the sodium sulfate decahydrate and the sodium borate decahydrate that are filled in the gap 11 between the cylindrical container 2 and the cylindrical hollow core material 15 are not uniformly mixed and used. Sodium sulfate decahydrate is filled so as to be unevenly distributed in the tip portion 6 or the other end portion 6A or the inner peripheral surface 9 in the cylindrical container.
【００２０】本発明においては、このように筒状容器２
内に充填される２種の化合物（硫酸ナトリウム１０水塩
とホウ酸ナトリウム１０水塩）を均一に混合させること
なく、筒状容器２内の先端部６または他端部６Ａあるい
は内周面９にホウ酸ナトリウム１０水塩を充填している
ので、凝固時に相分離などが起こることなく凝固し、効
率的に蓄熱および放熱を行うことができる。In the present invention, the cylindrical container 2 is thus constructed.
Without mixing the two kinds of compounds (sodium sulfate decahydrate and sodium borate decahydrate) filled in the inside uniformly, the tip portion 6 or the other end portion 6A or the inner peripheral surface 9 in the cylindrical container 2 Since it is filled with sodium borate decahydrate, solidification occurs without phase separation during solidification, and heat can be stored and released efficiently.
【００２１】なお、従来例のように、硫酸ナトリウム１
０水塩とホウ酸ナトリウム１０水塩とを均一に混合して
用いると、ホウ酸ナトリウム１０水塩自体が水溶性を示
すため、結晶状態の硫酸ナトリウム１０水塩が溶解して
生じた硫酸ナトリウムの結晶水に解け出し、融解した硫
酸ナトリウムが再度結晶化して硫酸ナトリウム１０水塩
になるのを阻害し過冷却現象が発生しやすくなり、沈澱
が生ずることにより著しく耐久性が低下することがあ
る。As in the conventional example, sodium sulfate 1
Sodium borate decahydrate itself shows water solubility when 0-hydrate and sodium borate decahydrate are mixed uniformly, so that sodium sulfate decahydrate in crystalline state is dissolved to form sodium sulfate. Of the water of crystallization and melted sodium sulfate is prevented from re-crystallizing to become sodium sulfate decahydrate, and a supercooling phenomenon is likely to occur, and precipitation may cause remarkable decrease in durability. .
【００２２】本発明では、このようにホウ酸ナトリウム
１０水塩は、筒状容器内の先端部６または他端部６Ａあ
るいは内周面９に偏在され、しかも硫酸ナトリウム１０
水塩とホウ酸ナトリウム１０水塩とが均一に混合しない
ように充填されており、ホウ酸ナトリウム１０水塩の結
晶は、硫酸ナトリウムの凝固時の核となり、蓄熱材全体
を結晶化させることができる。In the present invention, the sodium borate decahydrate is thus unevenly distributed on the tip portion 6 or the other end portion 6A or the inner peripheral surface 9 in the cylindrical container, and the sodium sulfate 10
The hydrate and sodium borate decahydrate are packed so as not to be mixed uniformly, and the crystals of sodium borate decahydrate serve as nuclei during solidification of sodium sulfate and can crystallize the entire heat storage material. it can.
【００２３】このように該筒状容器２内に偏在するよう
に充填されるホウ酸ナトリウム１０水塩の量は、硫酸ナ
トリウム１０水塩とホウ酸ナトリウム１０水塩との合計
１００体積％中、０．５〜１０体積％、好ましくは１〜
３体積％であることが望ましい。As described above, the amount of sodium borate decahydrate that is unevenly distributed in the cylindrical container 2 is 100% by volume of sodium sulfate decahydrate and sodium borate decahydrate. 0.5-10% by volume, preferably 1-
It is preferably 3% by volume.
【００２４】本発明における筒状容器および筒状中空芯
材は、図４に示すように断面形状が楕円状であってもよ
い。上述したような本発明に係る蓄熱装置を用いると、
極めて大きな潜熱を取り出すことができる。しかもこの
蓄熱装置は、長期間繰り返して使用することができる。The tubular container and the tubular hollow core material according to the present invention may have an elliptical cross section as shown in FIG. When the heat storage device according to the present invention as described above is used,
Extremely large latent heat can be extracted. Moreover, this heat storage device can be repeatedly used for a long period of time.
【００２５】例えば、図１に示す蓄熱装置［容器２の内
径Ｓが４０ｍｍ、間隙距離Ｄが１５ｍｍ、長さＬが１２
００ｍｍの円筒状アクリル樹脂からなり、ホウ酸ナトリ
ウム１０水塩：１５ｍｌが容器一方端６に充填され、他
は、硫酸ナトリウム１０水塩１３９７ｍｌで満たされた
もの］では、２８℃まで昇温すると、熱吸収（潜熱蓄
熱）を開始して１６０分間経過時点で、例えば２４６Ｋ
Ｊ／Ｋｇの吸熱が認められ、２５℃まで温度が下がると
放熱（凝固）を開始して１６０分経過時点で、例えば２
２４ＫＪ／Ｋｇの放熱が認められる。これはほぼ理論値
に近似する数値である。For example, the heat storage device shown in FIG. 1 [inner diameter S of container 2 is 40 mm, gap distance D is 15 mm, and length L is 12]
It is made of a cylindrical acrylic resin of 00 mm, and sodium borate decahydrate: 15 ml is filled in one end 6 of the container, and the other is filled with sodium sulfate decahydrate 1397 ml]. 160 minutes after heat absorption (latent heat storage) is started, for example, 246K
An endotherm of J / Kg was observed, and when the temperature dropped to 25 ° C, heat dissipation (solidification) started and 160 minutes later, for example, 2
A heat radiation of 24 KJ / Kg is recognized. This is a numerical value that approximates the theoretical value.
【００２６】しかも、この蓄熱装置は、４，０００〜
５，０００回も繰返して使用することができるなど、蓄
熱と放熱とを繰返して長期間継続して使用することがで
きる。なお、縦６０ｃｍ×横２５ｃｍ×厚さ１ｍｍのポ
リプロピレン（ＰＰ）樹脂板間に、厚さ２５ｍｍで、蓄
熱材として硫酸ナトリウム１０水塩とホウ酸ナトリウム
１０水塩とを上記量比で混合して用いた従来例に係る板
状蓄熱装置では、蓄熱・放熱の効率が低く、上記条件で
の吸熱量は３０ｃａｌ／ｇ程度に過ぎず、また上記条件
での放熱量は３０ｃａｌ／ｇ程度に過ぎず、耐用回数も
１，０００回程度に過ぎない。Moreover, this heat storage device has
For example, the heat storage and the heat dissipation can be repeated for a long period of time, such as the repeated use of 5,000 times. It should be noted that, between polypropylene (PP) resin plates having a length of 60 cm × a width of 25 cm × a thickness of 1 mm, a thickness of 25 mm and sodium sulfate decahydrate and sodium borate decahydrate as heat storage materials were mixed in the above amount ratio. In the plate-shaped heat storage device according to the conventional example used, the efficiency of heat storage and heat dissipation is low, the amount of heat absorption under the above conditions is only about 30 cal / g, and the amount of heat dissipation under the above conditions is only about 30 cal / g. The service life is only about 1,000 times.
【００２７】本発明に係る蓄熱装置は、上記のように筒
状容器内に筒状中空芯材が同心円状に配置されており、
筒状容器内の隙間１１に硫酸ナトリウム１０水塩とホウ
酸ナトリウム１０水塩とが充填されてなり、ホウ酸ナト
リウム１０水塩が、該筒状容器内の端部あるいは内周面
に偏在しており、しかも筒状容器内周面と筒状中空芯材
外周面との径方向距離が５〜２５ｍｍであるため、充填
されている蓄熱材の相分離などが起こることなく凝固
し、蓄熱装置内に貯えられた大きな潜熱を取り出すこと
ができる。In the heat storage device according to the present invention, the tubular hollow core material is concentrically arranged in the tubular container as described above,
The gap 11 in the cylindrical container is filled with sodium sulfate decahydrate and sodium borate decahydrate, and the sodium borate decahydrate is unevenly distributed at the end or the inner peripheral surface in the cylindrical container. Moreover, since the radial distance between the inner peripheral surface of the tubular container and the outer peripheral surface of the tubular hollow core material is 5 to 25 mm, the filled heat storage material is solidified without phase separation or the like, and the heat storage device The large latent heat stored inside can be taken out.
【００２８】なお、筒状容器内に蓄熱材が充填されてな
る蓄熱装置では、蓄熱材が筒状容器内周面から中心に向
かって結晶化する際に、できた結晶相内では熱伝導率が
低いため、蓄熱材中心部は、結晶化されにくいと考えら
れるが、本発明のように蓄熱材の中心部に筒状中空芯材
を有する蓄熱装置では、蓄熱材が筒状容器中心部に存在
しないため、相分離等が起こることなく蓄熱材は効率的
に凝固し、蓄熱装置内に貯えられた大きな潜熱を取り出
すことができる。しかも、本発明の蓄熱装置では、筒状
中空芯材内の空隙１２に液体（例：水）等の熱媒体を通
すことも可能であるため、筒状容器内周面方向と筒状中
空芯材の外周面方向との両方向から、相分離等が起こる
ことなく蓄熱材は効率的に凝固し、蓄熱装置内に貯えら
れた潜熱を取り出すことができる。In the heat storage device in which the heat storage material is filled in the tubular container, when the heat storage material is crystallized from the inner peripheral surface of the tubular container toward the center, the thermal conductivity in the crystal phase formed. Since it is low, the heat storage material central part is considered to be less likely to be crystallized, but in the heat storage device having a tubular hollow core material in the center part of the heat storage material as in the present invention, the heat storage material is in the cylindrical container center part. Since the heat storage material does not exist, the heat storage material is effectively solidified without phase separation and the large latent heat stored in the heat storage device can be taken out. Moreover, in the heat storage device of the present invention, it is also possible to pass a heat medium such as a liquid (eg, water) through the voids 12 in the tubular hollow core material, so that the inner peripheral surface direction of the tubular container and the tubular hollow core From both the outer peripheral surface direction and the material outer peripheral surface direction, the heat storage material is effectively solidified without phase separation or the like, and the latent heat stored in the heat storage device can be taken out.
【００２９】本発明の蓄熱装置１は、例えば、図５に示
すように屋内の床下にセットされる。すなわち、図５に
示すように、打設されたスラブ２１上に硬質ポリウレタ
ンボード等の断熱材２２を敷設し、さらにこの断熱材２
２上に面状発熱体２５を載置する。この面状発熱体２５
上に、本発明に係る蓄熱装置１をセットする。次いでこ
れら面状発熱体２５および蓄熱装置１を被覆するよう
に、モルタル２６を流し込んで硬化させた後、仕上げ材
２７を敷設すれば床下暖房工事は完成する。The heat storage device 1 of the present invention is set, for example, under an indoor floor as shown in FIG. That is, as shown in FIG. 5, a heat insulating material 22 such as a rigid polyurethane board is laid on the cast slab 21, and the heat insulating material 2
The sheet heating element 25 is placed on the surface 2. This sheet heating element 25
The heat storage device 1 according to the present invention is set on the top. Next, after the mortar 26 is poured and hardened so as to cover the planar heating element 25 and the heat storage device 1, the finishing material 27 is laid to complete the underfloor heating work.
【００３０】このような床下暖房を利用するには、安価
な夜間電力を利用して面状発熱体２５を発熱させ、蓄熱
装置１内に蓄熱する。次いで、昼間この蓄熱装置内に貯
えられた潜熱を取り出せば、長時間効率よく安価な床下
暖房を行なうことができる。In order to use such underfloor heating, the sheet heating element 25 is caused to generate heat by using inexpensive nighttime electric power, and the heat is stored in the heat storage device 1. Then, by extracting the latent heat stored in the heat storage device during the daytime, it is possible to efficiently and inexpensively perform underfloor heating for a long time.
【００３１】[0031]
【発明の効果】本発明に係る蓄熱装置によれば、大きな
潜熱を取り出すことができ、しかもこの蓄熱装置は、長
期間繰返して使用できる。According to the heat storage device of the present invention, a large amount of latent heat can be taken out, and the heat storage device can be repeatedly used for a long period of time.
【図１】図１は、本発明の一実施例に係る蓄熱装置の縦
断面図である。FIG. 1 is a vertical cross-sectional view of a heat storage device according to an embodiment of the present invention.
【図２】図２は、図１に示す蓄熱装置の［Ａ］−［Ａ］
線方向断面図である。FIG. 2 is a view of the heat storage device shown in FIG.
It is a line direction sectional view.
【図３】図３は、放熱板が設けられた筒状容器の横断面
図である。FIG. 3 is a cross-sectional view of a cylindrical container provided with a heat dissipation plate.
【図４】図４は、楕円状筒状容器の横断面図である。FIG. 4 is a cross-sectional view of an elliptic cylindrical container.
【図５】図５は、本発明に係る蓄熱装置１がセットされ
た床構造の一部切欠断面図である。FIG. 5 is a partially cutaway sectional view of a floor structure in which the heat storage device 1 according to the present invention is set.
１・・・・・・ 蓄熱装置
２・・・・・・筒状容器
３・・・・・・蓄熱材
６，６Ａ・・・・・・ 筒状容器内端部
７・・・・・・筒状容器外周面
９・・・・・・筒状容器内周面
１１・・・・・・筒状容器と筒状中空芯材間の間隙
１３・・・・・・筒状中空芯材外周面
１５・・・・・・筒状中空芯材
Ｄ・・・・・・筒状容器内周面と筒状中空芯材外周面との径方
向距離
Ｓ・・・・・・ 筒状容器内径。Heat storage device 2 Cylindrical container 3 Heat storage material 6, 6A ... Cylindrical container inner end 7 Cylindrical container outer peripheral surface 9 ... Cylindrical container inner peripheral surface 11 ... Gap 13 between cylindrical container and tubular hollow core material. Surface 15: Cylindrical hollow core material D: Radial distance S between cylindrical container inner peripheral surface and cylindrical hollow core outer surface S: Internal diameter of cylindrical container .
Claims (5)
円状に配置されており、 該筒状容器と、該筒状中空芯材との間隙に硫酸ナトリウ
ム１０水塩とホウ酸ナトリウム１０水塩とが充填されて
おり、該ホウ酸ナトリウム１０水塩が、該筒状容器内の
端面または内周面に偏在しており、該筒状容器内周面と
該筒状中空芯材外周面との径方向距離が５〜２５ｍｍで
あることを特徴とする蓄熱装置。1. A tubular hollow core material is arranged substantially concentrically in a tubular container, and sodium sulfate decahydrate and boron are placed in a gap between the tubular container and the tubular hollow core material. Sodium borate decahydrate is filled, and the sodium borate decahydrate is unevenly distributed on the end surface or the inner peripheral surface in the cylindrical container, and the inner peripheral surface of the cylindrical container and the cylindrical hollow A heat storage device characterized in that a radial distance from the outer peripheral surface of the core material is 5 to 25 mm.
容器内の一方の端面に偏在していることを特徴とする請
求項１に記載の蓄熱装置。2. The heat storage device according to claim 1, wherein the sodium borate decahydrate is unevenly distributed on one end surface of the cylindrical container.
硫酸ナトリウム１０水塩とホウ酸ナトリウム１０水塩と
の合計１００体積％中、ホウ酸ナトリウム１０水塩が
０．５〜１０体積％の量で充填されていることを特徴と
する請求項１または２に記載の蓄熱装置。3. In the gap between the tubular container and the tubular hollow core material,
The sodium borate decahydrate is filled in an amount of 0.5 to 10 vol% in a total of 100 vol% of sodium sulfate decahydrate and sodium borate decahydrate. The heat storage device according to 2.
ことを特徴とする請求項１〜３のいずれかに記載の蓄熱
装置。4. The heat storage device according to claim 1, wherein an outer peripheral surface of the cylindrical container is roughened.
れていることを特徴とする請求項１〜４のいずれかに記
載の蓄熱装置。5. The heat storage device according to claim 1, wherein a heat dissipation plate is provided on an outer peripheral surface of the cylindrical container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00613994A JP3390240B2 (en) | 1994-01-25 | 1994-01-25 | Heat storage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00613994A JP3390240B2 (en) | 1994-01-25 | 1994-01-25 | Heat storage device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07218166A JPH07218166A (en) | 1995-08-18 |
| JP3390240B2 true JP3390240B2 (en) | 2003-03-24 |
Family
ID=11630183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP00613994A Expired - Fee Related JP3390240B2 (en) | 1994-01-25 | 1994-01-25 | Heat storage device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3390240B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002162068A (en) * | 2000-11-28 | 2002-06-07 | Nax Co Ltd | Thermal storage unit, thermal storage tank, and thermal storage system |
| JP4549518B2 (en) * | 2000-11-28 | 2010-09-22 | ナックス株式会社 | Thermal storage tank and thermal storage device provided with the same |
-
1994
- 1994-01-25 JP JP00613994A patent/JP3390240B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07218166A (en) | 1995-08-18 |
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