JPS61170621A - Method for measuring coefficient of cubical expansion of hydrogen occluding alloy - Google Patents
Method for measuring coefficient of cubical expansion of hydrogen occluding alloyInfo
- Publication number
- JPS61170621A JPS61170621A JP1077885A JP1077885A JPS61170621A JP S61170621 A JPS61170621 A JP S61170621A JP 1077885 A JP1077885 A JP 1077885A JP 1077885 A JP1077885 A JP 1077885A JP S61170621 A JPS61170621 A JP S61170621A
- Authority
- JP
- Japan
- Prior art keywords
- hydrogen
- inert gas
- alloy
- volume
- measured
- 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.)
- Granted
Links
Landscapes
- Investigating And Analyzing Materials By Characteristic Methods (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明は水素吸蔵合金の体膨張率（体積変化率）の簡易
的な測定方法に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a simple method for measuring the coefficient of expansion (rate of change in volume) of a hydrogen storage alloy.
（ロ）従来の技術 一般にある種の合金が簡単に多量の水素を吸蔵。(b) Conventional technology In general, certain alloys easily absorb large amounts of hydrogen.
放出すること、また、その際相当量の熱の放出。and, in doing so, the release of considerable amounts of heat.
吸収を伴うことが知られている。これらの性質を利用し
て水素吸蔵合金は水素貯蔵や熱利用システムに用いる新
素材として注目されている。It is known that absorption is involved. Utilizing these properties, hydrogen storage alloys are attracting attention as new materials for use in hydrogen storage and heat utilization systems.
この水素吸蔵合金が多量の水素を吸蔵した場合、２０〜
３０％程度の体膨張を生じることが知られている。従っ
て、充填容器に多量の水素吸蔵°合金を充填した場合、
膨張により充填層内で予想外の大きな圧力が生じ、容器
破壊の危惧さえ生じかねないことが報じられている。When this hydrogen storage alloy stores a large amount of hydrogen, 20~
It is known that the body expands by about 30%. Therefore, when filling a container with a large amount of hydrogen-absorbing ° alloy,
It has been reported that the expansion causes an unexpectedly high pressure within the packed bed, which could even cause the container to break.
このため、水素吸蔵合金の体膨張率の測定は、容器破壊
の危険を防止し、最大充填量を、決定して効率良く水素
吸蔵合金を利用する上で、必要不可欠な要件となる。Therefore, measuring the coefficient of expansion of the hydrogen storage alloy is an essential requirement in order to prevent the risk of container destruction, determine the maximum filling amount, and utilize the hydrogen storage alloy efficiently.
しかしながら、この体膨張率の測定１よ、現在のところ
雰囲気が加圧水素状態にすることができるＸ線回折によ
る方法しか無く、装置が非常に高価につき、精度は高い
が解析が複雑になる欠点があった。However, at present, the only method for measuring the coefficient of body expansion (1) is to use X-ray diffraction, which allows the atmosphere to be in a pressurized hydrogen state, and the equipment is very expensive, and although the accuracy is high, the analysis is complicated. there were.
（ハ）発明が解決しようとする問題点
本発明は、上記の点に鑑み、極めて簡単かつ経済的に水
素吸蔵合金の体膨張率を測定することのできる方法を提
供することを目的とする。(c) Problems to be Solved by the Invention In view of the above points, an object of the present invention is to provide a method that can extremely simply and economically measure the coefficient of expansion of a hydrogen storage alloy.
（ニ）問題点を解決するための手段
このため本発明は、水素および水素吸蔵合金を含む系内
に水素および水素吸蔵合金と化学的および物理的相互作
用を受けない不活性ガスを混入し。(d) Means for Solving the Problems Therefore, the present invention mixes an inert gas that does not undergo chemical or physical interaction with hydrogen and the hydrogen storage alloy into a system containing hydrogen and the hydrogen storage alloy.
この不活性ガスによる内部圧力変動により、水素吸蔵合
金の水素放出時および水素吸蔵時の体膨張率を求めるよ
うにしたことを特徴としている。The present invention is characterized in that the internal pressure fluctuations caused by this inert gas are used to determine the coefficient of body expansion of the hydrogen storage alloy during hydrogen release and hydrogen absorption.
（ホ）作用
予め容積と圧力の判っている不活性ガスの入ったタンク
を水素吸蔵合金充填容器に接続して不活性ガスをその容
器に導入し、導入前後の雨音の圧力を測定することによ
り、水素吸蔵前後の前記容器の容積が求まる。従って、
これから水素吸蔵合金の体膨張率が計算により簡単に算
出される。(E) Action Connect a tank containing inert gas whose volume and pressure are known in advance to a container filled with hydrogen storage alloy, introduce the inert gas into the container, and measure the pressure of the rain sound before and after introduction. Accordingly, the volume of the container before and after hydrogen storage is determined. Therefore,
From this, the coefficient of expansion of the hydrogen storage alloy can be easily calculated.
（へ）実施例 以下、本発明の実施例を図面を参照して説明する。(f) Example Embodiments of the present invention will be described below with reference to the drawings.
図は水素吸蔵合金の体膨張率を測定するための装置構成
を示したもので、恒温槽１内に水素吸蔵合金２を収納す
る容器３を設置し、その容器３に水素吸蔵合金２の粉末
は通さないフィルタ４を介して配管５を接続する。その
配管５にバルブ６ａを介して恒温槽１外に設けた真空ポ
ンプ７を接続する。また。The figure shows the configuration of an apparatus for measuring the coefficient of expansion of hydrogen storage alloy.A container 3 containing hydrogen storage alloy 2 is installed in a constant temperature bath 1, and powder of hydrogen storage alloy 2 is placed in the container 3. The pipe 5 is connected through a filter 4 that does not allow water to pass through. A vacuum pump 7 provided outside the thermostatic chamber 1 is connected to the piping 5 via a valve 6a. Also.
配管５には圧力センサ８ａを取り付けると共に、バルブ
６ｂ 、 ６ｃを介してそれぞれ圧力センサ８ｂ、タン
ク９ａｐよび圧力センサ８ｃ、タンク９ｂを接続する。A pressure sensor 8a is attached to the piping 5, and the pressure sensor 8b, tank 9ap, and pressure sensor 8c, tank 9b are connected through valves 6b and 6c, respectively.
更に、そのタンク９ａは、バルブ６ｄを介して゛外部に
設けた減圧弁１０ａから水素ガスボンベ１１に接続する
。Further, the tank 9a is connected to a hydrogen gas cylinder 11 through a pressure reducing valve 10a provided outside through a valve 6d.
また、タンク９ｂは、バルブ６ｅを介して同じく外部に
設けた減圧弁ｔｏｂから不活性ガス（アルゴンガスが好
ましい）ボンベ１２に接続する。Further, the tank 9b is connected to an inert gas (preferably argon gas) cylinder 12 from a pressure reducing valve tob also provided externally via a valve 6e.
測定装置をこのように構成した上で、°水素吸蔵合金の
体膨張率の測定は、下記の操作手続で行なう。With the measuring device configured as described above, the coefficient of expansion of the hydrogen storage alloy is measured using the following operating procedure.
（ａ）先ず、恒温槽１の配管系統を各バルブ６８〜６ｅ
を境界として一点鎖線で示す如く、容器３を含む配管部
分Ａ、タンク９ａを含む配管部分Ｂ、タンク９ｂを含む
配管部分Ｃの３つの部分に分割し、恒温槽１に水素吸蔵
合金を充填していない状態で各配管部分Ａ−Ｃの容積を
測定する。これは各バルブ６を開始操作し、配管部分Ｂ
、Ｃ，Ａの順に定圧ガスを外部から流し、その流量を測
定することにより、簡単に測定できる。この結果、測定
した各配管部分Ａ−Ｃの各内容積をそれぞれＶｌ、Ｖ２
゜ｖ３とする。(a) First, connect the piping system of thermostatic chamber 1 to each valve 68 to 6e.
As shown by the dashed-dotted line as the boundary, it is divided into three parts: piping part A containing the container 3, piping part B containing the tank 9a, and piping part C containing the tank 9b, and the thermostatic chamber 1 is filled with hydrogen storage alloy. Measure the volume of each piping section A-C with the pipes closed. This starts each valve 6 and connects the pipe section B.
, C, and A from the outside in this order and measure the flow rate. As a result, the internal volumes of each measured piping section A-C are Vl and V2, respectively.
゜V3.
（ｂ）容器３に水素吸蔵合金２を充填し、配管部分Ａの
容積ｖ１′（水素吸蔵合金２により占有される容積Ｖａ
はＶａ＝Ｖ１−Ｖｔ’）を測定する。この測定方法は、
先ず、バルブ６ｅに減圧弁１０ｂを経て連絡されている
不活性ガスボンベ１２により、配管部分Ａおよび配管部
分Ｃを圧力Ｐ１にする。このとき。(b) The container 3 is filled with the hydrogen storage alloy 2, and the volume of the piping section A is v1' (the volume Va occupied by the hydrogen storage alloy 2).
Va=V1-Vt') is measured. This measurement method is
First, the pressure in the piping section A and the piping section C is brought to P1 using the inert gas cylinder 12 which is connected to the valve 6e via the pressure reducing valve 10b. At this time.
空気は前もって除去しておく。また、バルブ６ａ。Remove the air beforehand. Also, the valve 6a.
６ｂ 、 ６ｄは閉状態、バルブ６ｃ 、 ６ｅは開状
態にしておく。Valves 6b and 6d are kept closed, and valves 6c and 6e are kept open.
次に、バルブ６ｃを閉じ、配管部分Ｃを圧力Ｐ２に変化
させ、その後バルブ６ｅを閉じる。Next, the valve 6c is closed, the pressure in the piping section C is changed to P2, and then the valve 6e is closed.
次に、バルブ６ｃを開け、配管部分ＡとＣの平衡圧力Ｐ
３を測定する。これらの測定により１合金充填後の容積
Ｖｓ’は１次式により算出できる。Next, open the valve 6c, and the equilibrium pressure P of the piping sections A and C.
Measure 3. From these measurements, the volume Vs' after filling with one alloy can be calculated using a linear equation.
ここで、測定系内の温度は恒温槽１により、常に一定温
度に保持されている。Here, the temperature within the measurement system is always maintained at a constant temperature by the constant temperature bath 1.
（ｃ）バルブ６ａ 、 ６ｂ 、 ６ｄを開け、バルブ
６ｃ 、 ６ｅを閉じた状態で、真空ポンプ７により系
内のガスを排出する。その後、バルブ６ａを閉じ、バル
ブ６ｄに減圧弁１０ａを経て連絡されている水素ガスボ
ンベ１１により、水素を系内に導入し、水素吸蔵合金２
を活性化し、水素を吸蔵さ斌る。(c) With the valves 6a, 6b, and 6d open and the valves 6c and 6e closed, the gas in the system is exhausted by the vacuum pump 7. Thereafter, the valve 6a is closed, and hydrogen is introduced into the system by the hydrogen gas cylinder 11 connected to the valve 6d via the pressure reducing valve 10a.
Activates and absorbs hydrogen.
（ｄ）バルブ６ａ 、 ６ｂ 、 ６ｃ 、 ６ｄ 、
６ｅ全てを閉の状態にし、配管部分Ａは水素ガスだけ
が含まれ（圧力Ｐ４）。(d) Valves 6a, 6b, 6c, 6d,
6e are all closed, and the piping section A contains only hydrogen gas (pressure P4).
配管部分Ｃには不活性ガスだけが含まれる状態（配管部
分Ｃの圧力Ｐ５．Ｐ５＞Ｐ４）にする。次に。The pipe section C is brought into a state in which only inert gas is contained (pressure P5 of the pipe section C; P5>P4). next.
バルブ６ｃをオリフィスが小さい状態で開放し、不活性
ガスを配管部分Ａに排出させる。このとき、水素ガスが
バルブ６Ｃを経て配管部分Ｃに逆流しないようにする。The valve 6c is opened with a small orifice, and the inert gas is discharged into the piping section A. At this time, hydrogen gas is prevented from flowing back into the piping section C through the valve 6C.
この状態で配管部分Ａおよび配管部分Ｃの圧力がそれぞ
れＰｓ’、Ｐｓ’ になるとすれば、配管部分Ａの容積
Ｖ＋’は、次式により求められる。In this state, if the pressures in piping section A and piping section C become Ps' and Ps', respectively, then the volume V+' of piping section A is determined by the following equation.
この測定においても、測定系内の温度は、恒温槽１によ
り常に一定温度に保持しておく。Also in this measurement, the temperature within the measurement system is always maintained at a constant temperature by the constant temperature bath 1.
以上の測定で、水素化されていない合金の占有体積Ｖａ
、水素化された合金の占有体積ｖｂは、次式により与え
られる。In the above measurements, the occupied volume of the unhydrogenated alloy Va
, the occupied volume vb of the hydrogenated alloy is given by the following equation.
Ｖａ ＝ Ｖ Ｉ−Ｖ ＋’ −・
・（３）Ｖｂ＝Ｖｔ−Ｖ＋“ −−−
−−−（４）従って、水素吸蔵合金の体膨張率ＶＨは。Va = VI-V +' -・
・(3) Vb=Vt-V+“ ---
---(4) Therefore, the coefficient of body expansion VH of the hydrogen storage alloy is.
として簡単に求めることができる。can be easily obtained as .
（ト）発明の詳細
な説明したように、本発明によれば、簡単な装置により
容易に体膨張率が測定でき１合金充項容器に無理な応力
が加わらない状態で、最大の充填量を決定することが可
能となる。(G) As described in detail, according to the present invention, the coefficient of thermal expansion can be easily measured using a simple device, and the maximum filling amount can be measured without applying undue stress to the one-alloy filled container. It becomes possible to decide.
図は本発明の一実施例に係る水素吸蔵合金の体膨張率の
測定装置の構成図である。
１・・・恒温槽、２・・・水素吸蔵合金、３・・・容器
、４・・・フィルタ、５・・・配管、６８〜６ｅ・・・
バルブ、７・・・真空ポンプ、８ａ〜８ｃ・・・圧力セ
ンサ、 ９ａ、９ｂ・・・タンク、１０ａ、１０ｂ・・
・減圧弁、 Ｉｆ ・・水素ガスボンベ、１２・・・
不活性ガスボンベ。
、５〜′−′、
代理人 弁理士 紋 １） 誠 ・−一〆′The figure is a configuration diagram of an apparatus for measuring the coefficient of expansion of a hydrogen storage alloy according to an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Constant temperature chamber, 2... Hydrogen storage alloy, 3... Container, 4... Filter, 5... Piping, 68-6e...
Valve, 7... Vacuum pump, 8a-8c... Pressure sensor, 9a, 9b... Tank, 10a, 10b...
・Pressure reducing valve, If...Hydrogen gas cylinder, 12...
Inert gas cylinder. , 5～'-', Agent Patent Attorney Crest 1) Makoto ・-ichi〆'
Claims (1)
性ガスを導入して圧力を測定し、次に予め容積を測定し
たタンクに不活性ガスを入れて圧力を測定したのち両者
を接続し、平衡圧力を測定することにより、前記容器の
水素導入前容積を求め、次に、前記容器を水素で充たし
、前記水素吸蔵合金に水素を吸蔵させた状態で圧力を測
定し、前記タンクにはその圧力よりも高い圧力の不活性
ガスを入れた状態でオリフィスを介して前記容器に接続
し、不活性ガスを前記容器に導入して前記容器とタンク
の圧力を測定することにより、前記容器の水素導入後容
積を求め、これを前記水素導入前容積と比較することに
より、水素吸蔵合金の体膨張率を求めることを特徴とす
る水素吸蔵合金の体膨張率測定方法。In a thermostatic chamber, inert gas is introduced into the container containing the hydrogen storage alloy and the pressure is measured.Next, inert gas is introduced into a tank whose volume has been measured in advance and the pressure is measured, and then the two are connected. , determine the volume of the container before introducing hydrogen by measuring the equilibrium pressure, then fill the container with hydrogen and measure the pressure with the hydrogen storage alloy storing hydrogen; The container is connected to the container via an orifice with an inert gas at a pressure higher than that pressure, and the pressure of the container and tank is measured by introducing the inert gas into the container. A method for measuring the coefficient of physical expansion of a hydrogen storage alloy, characterized in that the volume after introduction of hydrogen is determined and the volume is compared with the volume before introduction of hydrogen to determine the coefficient of expansion of the hydrogen storage alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1077885A JPS61170621A (en) | 1985-01-25 | 1985-01-25 | Method for measuring coefficient of cubical expansion of hydrogen occluding alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1077885A JPS61170621A (en) | 1985-01-25 | 1985-01-25 | Method for measuring coefficient of cubical expansion of hydrogen occluding alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61170621A true JPS61170621A (en) | 1986-08-01 |
| JPH0414737B2 JPH0414737B2 (en) | 1992-03-13 |
Family
ID=11759788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1077885A Granted JPS61170621A (en) | 1985-01-25 | 1985-01-25 | Method for measuring coefficient of cubical expansion of hydrogen occluding alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61170621A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021105793A1 (en) * | 2019-11-25 | 2021-06-03 | Anton Paar Quantatec Inc. | Pycnometer with acclimation chamber |
-
1985
- 1985-01-25 JP JP1077885A patent/JPS61170621A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021105793A1 (en) * | 2019-11-25 | 2021-06-03 | Anton Paar Quantatec Inc. | Pycnometer with acclimation chamber |
| US11402311B2 (en) | 2019-11-25 | 2022-08-02 | Anton Paar Quantatec, Inc. | Pycnometer with acclimation chamber |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0414737B2 (en) | 1992-03-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |