*電子・情報システム工学専攻 **電子機械工学科 2010 年 9 月 28 日受付
ጊ↰⍮ᨑ
Ṛญ㓶ᄥ
⮮ਛẢ
Ⴧጊᣂੑ
Evaluation of a small pulse tube cryocooler by pressure waves
Chie YAMADA*, Yuta TAKIGUCHI*, Junya FUJINAKA* and Shinji MASUYAMA**
Abstract
This paper describes the experimental results of a small size pulse tube cryocooler (PTC) with three types of phase shifters. The phase shifter plays a key role in the cooling performance of the PTCs. The basic, orifice and double inlet phase shifters have been tested. In particular, we take notice of temperature at the cold end, and pressure at the hot-end of regenerator and pulse tube. The inner diameter and length of pulse tube are 14 mmǾ and 22 cm, respectively. Copper screens (200 mesh) of diameter of 18 mm were filled in the regenerator as a regenerator material. The PTC is operated at 4.5 Hz with an air cooled compressor of 800 W. Attained temperature at the cold end of basic, orifice and double inlet phase shifters were 205.6, 133.7 and 84.5 K, respectively. The characteristics pressure wave curves were observed in each phase shifter.
Key words: Pulse tube cryocooler, Phase shifter 1㧚 ߪߓߦ
ዊဳ⫾಄ᑼ಄ಓᯏߦಽ㘃ߐࠇࠆࡄ࡞ࠬ࠴ࡘࡉ
಄ಓᯏ (Pulse Tube Cryocoolerએ㒠ߪPTCߣ
߱)ߪ 1960 ᐕઍਛ㗃㧘Giffordߣ Longsworth ߦ ࠃ ߞ ߡ ⊒ ߐ ࠇ ߚ[1]ޕ ㄭ ᐕ 㧘 ዊ ဳ ಄ ಓ ᯏ ߪ 㧘 Gifford-McMahon㧔G-M㧕ࠨࠗࠢ࡞߿Stirlingࠨ
ࠗࠢ࡞ࠍ↪ߒߚ಄ಓᯏ߇㔚ዉࡑࠣࡀ࠶࠻㧘ᩭ
⏛᳇㡆↹ⵝ⟎㧔MRI㧕㧘࠾ࠕࡕ࠲ࠞߥ ߤߩಽ㊁ߢ↪ߐࠇߡࠆޕPTCߪ㧘ᯏ᪾⊛㚟േ
ㇱࠍᜬߚߥߚ㧘ૐᝄേ㧘ૐଔᩰ㧘㐳ኼ╬ߩ
․ᓽ߇ࠅ㧘ᓟ߽᥉ߒߡߊߎߣ߇ᦼᓙߐࠇ ߡࠆޕߒ߆ߒߘߩὑߦߪߐࠄߦ㜞ᕈ⢻ߥ PTC ߩ㐿⊒߿㧘ߩ಄ಓᯏߢߪㆡᔕߒߦߊಽ㊁ߦᔕ
↪᧪ࠆࠃ߁ߦߥࠆߎߣ߽㊀ⷐߢࠆޕ
PTC ߦߪ㧘⋧ᓮⵝ⟎㧔ࠝࡈࠖࠬ߿࠳ࡉ࡞
ࠗࡦ࠶࠻ߥߤ㧕ࠍ⸳ߌߥࡌࠪ࠶ࠢဳ㧘ࡌࠪ
࠶ࠢဳࡄ࡞ࠬ࠴ࡘࡉߩ㐽┵ㇱߦࠝࡈࠖࠬࠍ
ߒߡࡃ࠶ࡈࠔኈེࠍធ⛯ߐߖߚࠝࡈࠖࠬဳ㧘ߐ ࠄߦ⫾಄ེࠍࡃࠗࡄࠬߔࠆࠃ߁ߥᵹ〝ࠍ⸳ߌߚ࠳
ࡉ࡞ࠗࡦ࠶࠻ဳ߇ࠆޕᧄ⎇ⓥߢߪ㧘⋧ᓮⵝ
⟎ࠍ⺞▵ߒ㧘᷷ᐲ᷹ቯߣജᵄᒻࠍ᷹ቯߔࠆޕ⫾಄
ེ㜞᷷┵ߣࡄ࡞ࠬ࠴ࡘࡉ㜞᷷┵ߦᵈ⋡ߒ᷹ቯߒ ߚജᵄᒻ߆ࠄࡄ࡞ࠬ࠴ࡘࡉ಄ಓᯏߩ಄ಓ⢻ജ ࠍ⹏ଔߔࠆޕ
2. ࡄ࡞ࠬ࠴ࡘࡉ಄ಓᯏ 2.1ࡄ࡞ࠬ࠴ࡘࡉ಄ಓᯏߩⷐ
࿑1 ߦPTCߩ⇛࿑ࠍ␜ߔޕPTCߩ᭴ᚑⷐ⚛
ߪਥߦ㧘❗ᯏ㧔ࠦࡦࡊ࠶ࠨ㧕㧘ജಾᦧࡃ࡞
ࡉ㧘⫾಄ེ㧘ࡄ࡞ࠬ࠴ࡘࡉ㧘⋧ᓮᯏ᭴ߢ
ࠆޕ❗ᯏ߆ࠄㅍࠄࠇߚ㜞ࡋ࠙ࡓࠟࠬ߇㧘
ജಾᦧࡃ࡞ࡉߦࠃࠅ㧘㜞ૐߩᝄേᵹߦᄌ឵ߐ ࠇ㧘಄ಓᯏౝߦዉߐࠇࠆޕPTCߢߪ㧘ࡄ࡞ࠬ࠴
ࡘࡉౝߩࠟࠬ߇㧘ߚ߆߽࿕ࡇࠬ࠻ࡦ㧔ࠟࠬ
ࡇࠬ࠻ࡦߣ⸒ࠊࠇࠆ㧕ߩࠃ߁ߦᝄࠆ⥰߁ߎߣߦࠃ ࠅ㧘ࠟࠬࠍ⤘ᒛߐߖߡࠆޕߎߩࠟࠬࡇࠬ࠻ࡦߩ
േ߈ࠍᝄേᵹߦหᦼߒߡᓮߔࠆߚߦ㧘⋧
ᓮᯏ᭴߇⸳⟎ߐࠇࠆޕቶ᷷߆ࠄዉߐࠇࠆࠟࠬ
ߣ㧘⤘ᒛⓨ㑆ߦࠃࠅ಄ළߐࠇߚࠟࠬ߇㧘ห৻⚻〝
ࠍㅢㆊߔࠆޕߘߩߚ㧘 ⤘ᒛⓨ㑆ߦࠃࠅ಄ළߐࠇ ߚࠟࠬ߇⫾಄ེߦᚯࠅ㧘⫾಄ེౝߢߪࡋ࠙ࡓࠟ
ࠬߣ⫾಄᧚ߩ㑆ࠍᾲ឵ߒߥ߇ࠄࠨࠗࠢ࡞ࠍ➅ࠅ
ߔޕߎߩࠨࠗࠢ࡞ࠍ➅ࠅߔߎߣߢ㧘⫾಄ེߣ ࡄ࡞ࠬ▤ߩ㑆ߩૐ᷷ㇱߩ᷷ᐲࠍૐਅߐߖࠆޕ
ߎߎߢࡌࠪ࠶ࠢဳ㧘ࠝࡈࠖࠬဳ㧘࠳ࡉ࡞ࠗ
ࡦ࠶࠻ဳߦߟߡ⺑ߔࠆޕ
㧔1㧕࿑ 1 ࠃࠅ㧘ࡌࠪ࠶ࠢဳߪ㧘⋧ᓮⵝ⟎ࠍ
↪ߥߩߢࠝࡈࠖࠬߣ࠳ࡉ࡞ࠗࡦ࠶࠻ਔᣇ ߩࡃ࡞ࡉࠍ㐽ࠆޕ
㧔2㧕ࠝࡈࠖࠬဳߪ㧘ࡌࠪ࠶ࠢဳࡄ࡞ࠬ࠴ࡘ
ࡉߩ㐽┵ㇱߦࠝࡈࠖࠬࠍߒߡࡃ࠶ࡈࠔኈེ
ࠍធ⛯ߐߖߚ߽ߩߢ㧘ࠝࡈࠖࠬࡃ࡞ࡉߩߺࠍ㐿 ߌᵹ㊂ଥᢙࠍ⺞▵ߔࠆޕ࠳ࡉ࡞ࠗࡦ࠶࠻ߪ㐽ߓ ߡ߅ߊޕ
㧔3㧕࠳ࡉ࡞ࠗࡦ࠶࠻ဳߪ㧘ࠝࡈࠖࠬဳߦߐࠄ ߦ⫾಄ེࠍࡃࠗࡄࠬߔࠆࠃ߁ߥᵹ〝ࠍធ⛯ߐߖߚ
߽ߩߢ㧘ࠝࡈࠖࠬߣ࠳ࡉ࡞ࠗࡦ࠶࠻ਔᣇߩࡃ
࡞ࡉࠍ㐿ߌᵹ㊂ଥᢙࠍ⺞▵ߔࠆޕ
ࠝࡈࠖࠬ
⫾಄ེ
ࡄ࡞ࠬ▤
ࡃ࠶ࡈࠔ
㜞ૐ
ಾᦧࡃ࡞ࡉ 㜞
ૐ
ૐ᷷┵ᾲ឵ེ ❗ᯏ
㜞᷷┵ᾲ឵ེ P3
P2
P1
࠳ࡉ࡞ࠗࡦ࠶࠻
᷷ᐲ⸘
࿑1 ࡄ࡞ࠬ࠴ࡘࡉ಄ಓᯏߩ⇛࿑
2.2ታ㛎ⵝ⟎
࿑2(a)ߦࡄ࡞ࠬ▤ߣ⫾಄ེߩ౮⌀ࠍ␜ߔޕฝ
߇ࡄ࡞ࠬ࠴ࡘࡉ㧔ౝᓘ14mmǾ㧘㐳ߐ220mm㧘
ෘߐ0.5mm㧕㧘Ꮐ߇⫾಄ེ㧔ౝᓘ18mmǾ㧘㐳
ߐ120mm㧘ෘߐ0.5mm㧕ߢࠆޕૐ᷷ㇱࠍല
ߦ↪ߔࠆߚߦ㧘ࡄ࡞ࠬ࠴ࡘࡉߣ⫾಄ེ߇U ሼဳ᭴ㅧ㧔ታ㓙ߪਅኻߦㆇォߐࠇࠆ㧕ߣߥߞ ߡࠆޕ࿑3ߦታ㓙ߩታ㛎ⵝ⟎ߩ౮⌀ࠍ␜ߔޕታ 㓙ߪ㧘⌀ⓨኈེࠍ߆߱ߖౝㇱࠍ⌀ⓨߦߞߡታ㛎 ࠍⴕ߁ޕ
ᧄ⎇ⓥߢ↪ߒߚࠦࡦࡊ࠶ࠨTAC 101Jߣ
ಾᦧࡃ࡞ࡉߪ㧘ߕࠇ߽ࠕࠗࠪࡦ♖ᯏᩣᑼળ␠㧘
ജࡦࠨߪKYOWAPCD-300Aࠍ↪ߒߚޕ
߹ߚ㧘᷷ᐲ⸘ߪLake Shore␠ߩࠪࠦࡦ᷷ᐲ⸘
ࠍ↪ߒ㧘ࠝࡈࠖࠬࡃ࡞ࡉߣ࠳ࡉ࡞ࠗࡦ࠶࠻
ߪߣ߽ߦSwagelok␠ࡔ࠲ࡦࠣࡃ࡞ࡉMࠪ
࠭ࠍ↪ߒߚޕ
࿑2(b)ߪޔ⫾಄᧚ߣߒߡ⫾಄ེߦలႯߒߚ㌃ࡔ
࠶ࠪࡘ㧔#200㧕ߢࠆޕ
(a) (b)
࿑2ࡄ࡞ࠬ࠴ࡘࡉ㧘⫾಄ེ㧘ࡔ࠶ࠪࡘߩ౮⌀
䉥䊥䊐䉞䉴 䊋䉾䊐䉜䊷
䉻䊑䊦 䉟䊮䊧䉾䊃
ജಾᦧ 䊋䊦䊑
࿑3 ታ㛎ⵝ⟎ߩ౮⌀
2.3⫾಄᧚
⫾಄᧚ߦߪ಄ಓᯏߩേ᷷ᐲߦ߅ߡᦨ߽Ⓧ
Ყᾲ㧔නⓍᒰߚࠅߩᲧᾲ㧕߇ᄢ߈᧚ᢱ߇৻⥸
ߦㆬᛯߐࠇࠆޕ⫾಄᧚ߪㅢᏱࡔ࠶ࠪࡘ߿ߦടᎿߒ ߡ↪ࠄࠇࠆޕࡔ࠶ࠪࡘߩ✢ᓘ߿ߩ⋥ᓘࠍዊߐߊ ߔࠆߎߣߦࠃߞߡචಽᄢ߈ߥવᾲ㕙Ⓧ߇ᓧࠄࠇ㧘⫾
಄᧚ߣࡋ࠙ࡓࠟࠬߣߩല₸⊛ߥᾲ឵߇น⢻ߦ ߥࠆޕ㌃ߣ㋦ߪᄙߊߩ಄ಓᯏߢ↪ࠄࠇߡࠆ⫾಄
᧚ߢࠆޕߘߩℂ↱ߪ㧘ߎࠇࠄߩ‛⾰߇ଔߢടᎿ ᕈߦንࠎߢࠆߣหᤨߦ㧘ⓍᲧᾲ߇Ყセ⊛ᄢ߈
ߚߢࠆޕ㌃߿㋦એᄖߦ㧘ࠬ࠹ࡦࠬ㍑߿࠽ࠗࡠ ࡦߥߤ߽↪ࠄࠇࠆߎߣ߇ࠆޕ࿑4ߦ㌃ߣ㋦ߩ
ⓍᲧᾲࠍ␜ߔޕ㌃ߪ⚂60KએߢᲧセ⊛ᄢ߈ߥⓍ
Ყᾲࠍߔࠆޕ㋦ߪ⚂60Kએਅߦߥࠆߣ㌃ࠃࠅᄢ߈ ߥⓍᲧᾲࠍߔࠆ[2]ޕ
0 0.5 1 1.5 2 2.5 3 3.5 4
0 50 100 150 200 250 300
ⓍᲧᾲ[J/cm3䊶K]
᷷ᐲ [K]
䊓䊥䉡䊛(1MPa)
㋦
㌃
࿑4 ㌃㧘㋦㧘߅ࠃ߮ࡋ࠙ࡓߩⓍᲧᾲ
3. ታ㛎ᣇᴺߣታ㛎⚿ᨐ 3.1ታ㛎ᣇᴺ
࿑2(a)ߩ⫾಄ེߩౝㇱߦ⫾಄᧚ߣߒߡ㌃#200ߩࡔ
࠶ࠪࡘࠍ680 ᨎⓍጀߒߚޕㆇォᵄᢙ4.5Hz㧘ኽ
ജ1.6MPa㧘ࡃ࠶ࡈࠔ࠲ࡦࠢኈ㊂ߪ500ml㧘಄ᇦߦ
ߪࡋ࠙ࡓࠟࠬࠍ↪ࠆޕࠦࡦࡊ࠶ࠨߩ㔚᳇
ജߪ800Wߢࠆޕ
ജ᷹ቯߪ㧘࿑1ߦ␜ߔࠃ߁ߦࠦࡦࡊ࠶ࠨ߆ ࠄߞߡߊࠆ⫾಄ེ㜞᷷┵㧔ജ㧕P1㧘ࡄ࡞ࠬ࠴
ࡘࡉ㜞᷷┵㧔ജ㧕P2㧘ࡃ࠶ࡈࠔ㧔ਛ㑆㧕 P3ߩ3ὐߩജࠍ᷹ቯߔࠆޕ᷷ᐲ᷹ቯߪ㧘࿑1ߩૐ
᷷ㇱߦขࠅઃߌߚࠪࠦࡦ࠳ࠗࠝ࠼᷷ᐲ⸘ߢ᷹
ቯࠍⴕ߁ޕ
3.2ታ㛎⚿ᨐ (1)಄ළ᷷ᐲ
ࠝࡈࠖࠬဳ
ࠝࡈࠖࠬဳߩᵹ㊂ଥᢙࠍ⺞▵ߒ᷷ᐲ᷹ቯࠍⴕ ߞߚޕ࿑ 5 ߦ᷷ᐲߣࠝࡈࠖࠬဳߩᵹ㊂ଥᢙ Cori ࠍ␜ߔޕࡌࠪ࠶ࠢဳ㧔Cori=0㧕ߩᤨߩ᷷ᐲߪ205.6K ߢߞߚޕࠝࡈࠖࠬဳߢߪ㧘ࠝࡈࠖࠬဳᵹ㊂ Cori=0.0101㧔ᩞᱜᦛ✢ࠃࠅ▚㧕ߢࠝࡈࠖࠬဳᦨ ૐ಄ළ᷷ᐲ133.7Kࠍᓧࠆߎߣ߇ߢ߈ߚޕ
0 50 100 150 200 250
0.000 0.002 0.004 0.006 0.008 0.010 0.012
᷷ᐲ[K]
ᵹ㊂ଥᢙCori
࿑5 ᷷ᐲߣࠝࡈࠖࠬᵹ〝ଥᢙCori
࠳ࡉ࡞ࠗࡦ࠶࠻ဳ
ࠝࡈࠖࠬဳߢᦨ߽ૐ಄ළ᷷ᐲࠍᓧࠆߎߣߩ ߢ߈ߚᵹ㊂ࠍࠝࡈࠖࠬဳߩᵹ㊂ᦨㆡ୯ߣߒߡ࿕
ቯߒ㧘࠳ࡉ࡞ࠗࡦ࠶࠻ဳߩᵹ㊂ଥᢙࠍ⺞ᢛߒ㧘ᦨ ૐ಄ළ᷷ᐲࠍ᳞ߚޕ࿑6ߦ᷷ᐲߣ࠳ࡉ࡞ࠗࡦ࠶
࠻ဳߩᵹ㊂ଥᢙCdoubleࠍ␜ߔޕ࠳ࡉ࡞ࠗࡦ࠶࠻
ဳߢߪ㧘Cori=0.0101㧘Cdouble=0.0101ߢᦨૐ಄ළ᷷
ᐲ84.5Kࠍᓧࠆߎߣ߇ߢ߈ߚޕߎࠇએᵹ㊂ଥᢙࠍ
Ⴧ߿ߔߣ᷷ᐲ߇ߔࠆߎߣࠍ⏕ߒߚޕ
0 20 40 60 80 100 120 140 160
0.000 0.002 0.004 0.006 0.008 0.010 0.012
᷷ᐲ[K]
ᵹ㊂ଥᢙCdouble
࿑6 ᷷ᐲߣ࠳ࡉ࡞ࠗࡦ࠶࠻ᵹ〝ଥᢙCdouble
(2)ജ᷹ቯߣ⋧
⋧ߪ㧘ജ P1 ࠍၮḰߣߒߡ㧘ജ P1 ߣജP2ߩ⋧ߩ࠭ࠍ⋧Ꮕߣߒߡࠆޕ
ࠝࡈࠖࠬဳ
࿑7ߦࠝࡈࠖࠬဳᵹ㊂ᦨㆡ୯㧔Cori=0.0101㧕 ߢߩജᵄᒻࠍ␜ߔޕ࿑8ߦࠝࡈࠖࠬဳߩᵹ㊂ ଥᢙࠍ⺞▵ߒߚᤨߩ᷷ᐲߣജP1㧙ജP2 ߩ⋧Ꮕࠍ␜ߔޕࠝࡈࠖࠬဳߢߪ㧘᷷ᐲ߇ਅ߇ ࠆߦߟࠇߡ⋧Ꮕ߇ᄢ߈ߊߥߞߚޕ
0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1
0.0 0.2 0.4 0.6 0.8 1.0
ജ[MPa]
ᤨ㑆 [sec]
ജP1
ജP2 䊋䉾䊐䉜䊷P3
࿑7 ࠝࡈࠖࠬᦨㆡ୯ߢߩജᵄᒻ
-50 -40 -30 -20 -10 0
120 140 160 180 200 220
⋧Ꮕ[deg]
᷷ᐲ [K]
࿑8 ᷷ᐲߣ⋧Ꮕ㧔ࠝࡈࠖࠬဳ㧕
࠳ࡉ࡞ࠗࡦ࠶࠻ဳ
࿑9ߦᦨૐ㆐᷷ᐲ84.5Kߢߩജᵄᒻࠍ␜ߔޕ
࿑ 10 ߦ࠳ࡉ࡞ࠗࡦ࠶࠻ဳߩᵹ㊂ଥᢙࠍ⺞▵ߒ ߚᤨߩ᷷ᐲߣജP1㧙ജP2ߩ⋧Ꮕࠍ␜
ߔޕ࠳ࡉ࡞ࠗࡦ࠶࠻ဳߢߪ㧘ࠝࡈࠖࠬဳߣߪ ㅒߦ᷷ᐲ߇ਅ߇ࠆߦߟࠇߡ⋧Ꮕ߇ዊߐߊߥߞߚޕ
0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1
0.0 0.2 0.4 0.6 0.8 1.0
ജ[MPa]
ᤨ㑆 [sec]
ജP1
ജP2 䊋䉾䊐䉜䊷P3
࿑9 ᦨૐ᷷ᐲߢߩജᵄᒻ
-50 -40 -30 -20 -10 0
80 90 100 110 120 130 140
⋧Ꮕ[deg]
᷷ᐲ [K]
࿑10 ᷷ᐲߣ⋧Ꮕ㧔࠳ࡉ࡞ࠗࡦ࠶࠻ဳ㧕
(3)❗Ყ ࠝࡈࠖࠬဳ
࿑11ߦࠝࡈࠖࠬဳߢߩ᷷ᐲߣജP1㧙
ࠆޕࡌࠪ࠶ࠢဳ㧔Cori=0㧕ߢߩജ P1㧙
ജP2ߩ❗ᲧߩᏅߪ0.143ߢࠆߩߦኻߒ㧘
ࠝࡈࠖࠬဳᦨㆡ୯㧔Cori=0.0101㧕ߢߪ 0.456 ߩᏅ߇ߞߚޕ
0 0.5 1 1.5 2 2.5
120 140 160 180 200 220
❗Ყ[MPa]
᷷ᐲ [K]
ജ
ജ
࿑11 ᷷ᐲߣ❗Ყ㧔ࠝࡈࠖࠬ㧕
࠳ࡉ࡞ࠗࡦ࠶࠻ဳ
࿑ 12 ߦ࠳ࡉ࡞ࠗࡦ࠶࠻ဳߢߩ᷷ᐲߣ❗Ყ ࠍ␜ߔޕ࠳ࡉ࡞ࠗࡦ࠶࠻ဳߪ㧘ࠝࡈࠖࠬဳߣ ߪㅒߦ᷷ᐲ߇ਅ߇ࠆߦߟࠇߡജ㧙ജߩ
❗ᲧߩᏅ߇ዊߐߊߥߞߡࠆޕ࠳ࡉ࡞ࠗࡦ࠶࠻
ဳᵹ㊂ Cdouble=0ߢߩജ P1㧙ജP2 ߩ
❗ᲧߩᏅߪ0.456ߢࠆߩߦኻߒ㧘ᦨૐ಄ළ᷷
ᐲ ࠍ ᓧ ࠆ ߎ ߣ ߇ ߢ ߈ ߚ Cdouble=0.0101 ߢ ߪ 0.216ߩᏅߢߞߚޕ
0 0.5 1 1.5 2 2.5
80 90 100 110 120
❗Ყ[MPa]
᷷ᐲ [K]
ജ
ജ
࿑12 ᷷ᐲߣ❗Ყ㧔࠳ࡉ࡞ࠗࡦ࠶࠻㧕
4. ߹ߣ
࠳ࡉ࡞ࠗࡦ࠶࠻ဳࡄ࡞ࠬ࠴ࡘࡉ಄ಓߦ⫾಄
᧚ߣߒߡ㌃#200ࠍ680ᨎలႯߒ㧘᷷ᐲ᷹ቯߣജᵄ ᒻߩ᷹ቯࠍⴕߞߚޕ
ࡌࠪ࠶ࠢဳߢߪ205.6K㧘ࠝࡈࠖࠬဳߢߪ㧘ᵹ
㊂ଥᢙCori=0.0101ߢ133.7K㧘࠳ࡉ࡞ࠗࡦ࠶࠻ဳ
ߢߪ㧘Cori=0.0101㧘Cdouble=0.0101ߢᦨૐ㆐᷷ᐲ
84.2Kࠍᓧࠆߎߣ߇ߢ߈ߚޕ
ജ᷹ቯߢߪ㧘ࠦࡦࡊ࠶ࠨ߆ࠄߞߡߊࠆ⫾
᷹ቯࠍⴕߞߚޕࠝࡈࠖࠬဳߢߪ㧘᷷ᐲ߇ૐਅߔࠆ ߦߟࠇߡ⋧Ꮕ߇ᄢ߈ߊߥࠅ㧘࠳ࡉ࡞ࠗࡦ࠶࠻ဳ
ߢߪ㧘᷷ᐲ߇ૐਅߔࠆߦߟࠇߡ⋧Ꮕ߇ዊߐߊߥࠆ ߎߣ߇ࠊ߆ߞߚޕ
❗ᲧߢᲧセߔࠆߣࠝࡈࠖࠬဳߢߪ㧘᷷ᐲ߇ૐ ਅߔࠆߦߟࠇߡജP1㧙ജP2ߩ❗ᲧߩᏅ ߇ᄢ߈ߊߥࠅ㧘࠳ࡉ࡞ࠗࡦ࠶࠻ဳߢߪ㧘᷷ᐲ߇ૐ ਅߔࠆߦߟࠇജP1㧙ജP2ߩ❗Ყ߇ዊߐ ߊߥࠆߎߣ߇ࠊ߆ߞߚޕ
ജᵄᒻࠃࠅ㧘ࠝࡈࠖࠬဳߢߪ㧘ജP1㧙
ജP2ߩ⋧Ꮕ߇ᄢ߈ߊ㧘❗ᲧߩᏅ߇ᄢ߈ޕ
࠳ࡉ࡞ࠗࡦ࠶࠻ဳߢߪ㧘ജP1㧙ജP2ߩ
⋧Ꮕ߇ዊߐߊ❗ᲧߩᏅ߇ዊߐߣ಄ಓ⢻ജࠍ ะߐߖࠆߎߣ߇ߢ߈ࠆߣ⸒߃ࠆޕ
ෳ⠨ᢥ₂
[1] W.E.Gifford and R.C.Longsworth, Pulse-tube refrigeration, Trans. ASME, 1964, p. 264-268.
[2]᧻ේᵗ৻ࠄ㧘㔚ዉૐ᷷Ꮏቇࡂࡦ࠼ࡉ࠶ࠢ4┨
಄ಓᛛⴚ(1993) p.259
