ＯＴＥＣ
Vol. 18 (2013)，45〜52

洋上浮体型波力発電装置の大型化

45ὒୖᾋయᆺἼຊⓎ㟁⿦⨨ࡢ኱ᆺ໬Ώ㒊 ᐩ἞*1㸪ᾆᓥ ୕ᮁ*2㸪Ἑྜ⚽ᶞ*3
Floating type large scale wave energy converter for offshore use
Tomiji WATABE*1, Saburoh URASHIMA*2 and Hideki KAWAI*3*1

T- Wave Consultant, 5-23-3, Misono, Noboribetsu, JAPANIn order to get low cost electricity, the offshore Pendulor of large scale had been studied by Muroran I.T. This idea
was transferred to the OWC wave converter to improve it on the saving cost by multiplying with OWC and Pendulor.
We named it New OWC which is simple and robust same as the OWC and highly efficient like as the Pendulor. Theprinciple of the New OWC is shown here and a 1/25 scale model of it was made for the experimental study with a 2Dwave tank. The test could come to no goal but it clarified fundamental characteristics of the New OWC for future
investigations.
Key Words : New wave converter, Cost reduction, OWC, Pendulor, Combined system, Antenna1㸬 ࡣࡌࡵ࡟᪩ࡃ࠿ࡽἼຊⓎ㟁ࡢᐇ⏝໬ࡀᮇᚅࡉࢀ࡞ࡀࡽ㸪ࢥࢫࢺ㧗ࡀࢿࢵࢡ࡟࡞ࡾ㸪ࡲࡔᐇ⌧ࡋࡓ࡜ࡣゝ࠼࡞࠸㸬୍ᑐ⟇౛࡜ࡋ࡚㸪ὒୖᾋయᆺ᣺ᏊᘧἼຊⓎ㟁㸦Float Pendulor㸸ᗮ౯࡛㧗ຠ⋡㸧ࡀᥦ᱌ࡉࢀ࡚࠸ࡿ㸬ࡋ࠿ࡋ⊂⮬Ἔᅽኚ㏿ᶵ㸦HST㸧ࡢᢏ⾡⩦ᚓࡀ᮲௳㸬ࡑࡶࡑࡶᐃホ࠶ࡿ OWC ἼຊⓎ㟁⿦⨨ Ỉᰕ᣺ືᆺ ࡢຠ⋡ᨵၿࡀ࡛ࡁࢀࡤ㸪ࡍ࡭࡚ࡣゎỴࡍࡿ㸬ࡇࡢᡭẁ࡜ࡋ࡚㸪Floating Pendulor ࡢ㧗ຠ⋡ᛶࢆ OWC ࡟㐺⏝ࡋ࡚ࡳࡿࡇ࡜࡟ࡋࡓ㸬ᐇ⌧ࡍࢀࡤ㸪HST ↓⏝ 㧗ᗘ࡞⏕⏘ᢏ⾡ࡶ୙せ 㸪ࢩࣥࣉ࣭࣮ࣝࣟࣂࢫࢺ࡞ᵓ㐀ࡢୗ࡛㧗ຠ⋡Ⓨ㟁㸦኱ᐜ㔞㸧ࡀྍ⬟࡟࡞ࡿ㸬Ⓨ㟁ཎ⌮࡟࢔ࣥࢸࢼ᪉ᘧ᥇⏝㸬ືຊఏ㐩࣓ࢹ࢕࢔ࡣ✵Ẽ㸬㸦㧗ຠ⋡ᛶ࡜ᔒ࡟ᑐࡍࡿ⪏ஂᛶࡢ᰿ᣐ࡟࡞ࡿࡶࡢ㸬㸧ࡇࢀࡽࡢ᮲௳ࢆཷࡅධࢀࡿⓎ㟁ࢩࢫࢸ࣒ᵓ㐀ࢆ๰ฟࡋタィࡋࡓ㸬ࢩࢫࢸ࣒≉ᛶࢆゎᯒࡋ㸪ࢩࢫࢸ࣒᭱㐺໬タィࢆ⾜ࡗࡓ㸬ࡉࡽ࡟ᐇ⏝ᶵࢆ᝿ᐃࡋࡓⓎ㟁⿦⨨タィࢆヨࡳ㸪タィ౛ࢆᥦ♧ࡋࡓ㸬1/25 ࢫࢣ࣮ࣝࣔࢹࣝࢆ〇స㸪㸰ḟඖ㐀ἼỈᵴ࡟ࡼࡿἼᾉ࢚ࢿࣝࢠ࣮ྲྀᚓຠ⋡ࡢᐇ㦂ࢆ⾜ࡗࡓ㸬◊✲㏵ୖ࡛࠶ࡿࡀ௨ୖ࡟ࡘࡁࡲ࡜ࡵࡓ㸬
2㸬 New OWC ࡢᵓ⠏࢔ࣥࢸࢼ᪉ᘧࡣ㸪ඛࡎྍື≀య㸦᣺ືయ㸧࡟ᑐࡋ㸪Ἴ࡜ඹ᣺≧ែࡢ᣺ືࢆࡍࡿࡼ࠺࡟Ἴຊ㥑ືࡋ㸪ḟ࡟ࡑࡢ᣺ືࢆ㧗㏿ࡢᐃᖖᅇ㌿࡟ኚ᥮ࡋ㸪Ⓨ㟁ᶵ㥑ືࡍࡿࡶࡢ㸬㸦᣺Ꮚᘧࢆᑐ㇟࡟ࡋࡓᾏᇦᐇ㦂࡛㸪᥎ Ⓨ㟁ຠ⋡ 40%㹼60%ࢆᐇ ῭ࡳ࡛࠶ࡗࡓ㸧(1)OWC ࡛ࡣ㸪Ỉᰕࡀྍື≀య㸪Ỉᰕࡢձ㔜ຊ᪉ྥኚ఩࡟ࡼࡿ᚟ඖຊ㸦hydro-dynamic: Kh㸧࠾ࡼࡧỈᰕࡢղ㏦㢼ࣆࢫࢺࣥస⏝࡟ࡼࡿ཯ຊ(mechanical: Km)࡜ྍື≀య㉁㔞(mm + mh)࡜ࡢ㛵ಀ࠿ࡽඹ᣺≉ᛶࡀỴࡲࡿ㸬OWC ࡢᵓ㐀ࢆࢫࢣࣝࢺ࡛ࣥ♧ࡍ࡜ᅗ 1 ࡟࡞ࡿ㸬
ᅗ 1 ࡛ࡣ㸪Ỉᰕ㸦mechanical mass: mm㸧࡜௜ຍỈ㸦added water mass: mh㸧ࡀ୍య࡟࡞ࡾ᣺ືࡋ㸪ࡇࢀ࡟ᑐࡍࡿ 2ࡘࡢ᚟ඖຊࡤࡡ㸦ࡤࡡᐃᩘ㸸Kh ࠾ࡼࡧ Km㸧ࡀാࡃ㸬Ỉᰕ᣺ື࡟ࡼࡿ✵Ẽᅽ⦰స⏝ࡀ⏕ࡲࢀ㸪ࡑࢀ࡟క࠺✵Ẽὶ࡟ࡼࡾࢱ࣮ࣅࣥⓎ㟁ᶵࢆ㥑ື㸪㟁ຊ⏕⏘ࡍࡿ㸬ࡇࡢሙྜࡢỈᰕ᣺ືࡣ㸪ᘧ(1)ࡢᅛ᭷᣺ືᩘ ω0 ࡟࡞ࡿ㸬*ཎ✏ཷ௜ 2013 ᖺ 6 ᭶ 13 ᪥ඖ ᐊ⹒ᕤᴗ኱ᏛE-mail: t1watabe@rose.ocn.ne.jp*1

46

渡部富治，浦島三朗，河合秀樹

Z0Kh  Km
mm  mh(1)

࠿ࡘ ᘧ(2)ࡢඹ᣺≧ែ(2)
ω0㸻ωࡇࡇ࡛ ω㸸Ἴᾉࡢ᣺ືᩘ
࡟࡞ࡿ࡜ࡁⓎ㟁㔞ࡀ᭱኱࡟࡞ࡿࡢ࡛㸪ࡇࢀࢆ᭱㐺㐠㌿᮲௳ࡢ୍ࡘ࡟ࡍࡿ㸬(2)
ࡋ࠿ࡋᚑ᮶ࡢ OWC ᵓ㐀ࡣ㸪ᘧ(1)ࡢศẕࡀᑠࡉࡃ㸪࠿ࡘศᏊࡀ㠀ᖖ࡟኱ࡁࡃ࡞ࡿ㸬ࡇࡢ⌮⏤࡛㸪ᘧ(2)ࡀᡂ
❧ࡋ࡞࠸㸬⤖ᯝ࡜ࡋ࡚
(3)
ω0㸼ω
࡟࡞ࡗ࡚࠸ࡓ㸬ᑐ⟇࡜ࡋ࡚㸪ᘧ(1)ࡢศẕࢆ኱ࡁࡃࡍࡿ࡜ඹ࡟㸪ࡑࡢศᏊࢆᑠࡉࡃࡍࡿࡇ࡜࡟ࡼࡾ㸪ᘧ(2)ࡢᡂ❧ࢆᅗࡿࡇ࡜ࢆヨࡳࡓ㸬ࡇࡢ࢔࢖ࢹ࢕࢔ࡣ㸪ᚑ᮶ OWC ᵓ㐀࡛ࡣᐇ⌧ᅔ㞴࡜ุ᩿ࡋࡓ㸬ࡇࡇ࡛ࡣḟ❶ࡢ᪂ࡋ࠸ᵓ㐀㸦ᅗ 2㸧ࢆ๰ฟࡋ᳨ウࡋࡓ㸬ᅗ 1 ࢔ࣥࢸࢼཎ⌮࠿ࡽࡳࡓ OWC ᵓ㐀ᅗ 2 New OWC ࡢᵓ㐀㸦≉㢪 2010-153409㸧47

洋上浮体型波力発電装置の大型化

3㸬㸬 New OWC ᵓ㐀ᅗ 2 ࡟ࡘ࠸࡚ㄝ᫂ࡍࡿ㸬ᾋయᆺ㸬L ᆺỈᐊ㸦ࢲࢡࢺ㸧ෆ࡛㸪ධᑕἼຊ࡟ࡼࡾ ᚟㐠ືࡍࡿỈࡢࣆࢫࢺࣥస⏝࡟ࡼࡾ㸪྾ධࢱࣥࢡ㸦✵Ẽධࡾཱྀ࡟ࢱ࣮ࣅࣥⓎ㟁ᶵࡀࡘࡃ㸧࠿ࡽ✵Ẽࢆ྾࠸㎸ࡳ㸪ྤฟࢱࣥࢡ㸦✵Ẽ᤼ฟཱྀ࡟ࢱ࣮
ࣅࣥⓎ㟁ᶵࡀࡘࡃ㸧࡬✵Ẽࢆ㏦ࡾ㎸ࡴ㸬ࢱࣥࢡࡢධ᤼ཱྀ࡛㸪✵Ẽὶࡀࢱ࣮ࣅࣥⓎ㟁ᶵࢆ㥑ືࡋⓎ㟁ࡍࡿ㸬ࡇࢀ࡟ࡼࢀࡤ㸪ձ㐠ືయ㉁㔞㸦L ᆺࢲࢡࢺෆỈ࡜௜ຍỈࡀ୍⥴࡟㐠ືࡍࡿỈࡢ⥲㔞㸧ࡀ኱ࡁࡃ࡞ࡾ㸪ղ཯ᑐ࡟Ỉࣆࢫࢺࣥ࡟ാࡃ✵Ẽᅽࡤࡡࡢࡤࡡᐃᩘࡣᑠࡉࡃ࡞ࡿ㸬┠ⓗࡢᅛ᭷᣺ືᩘࢆᣢࡘᐇ⏝ᵓ㐀ࡀᐜ᫆࡟ᐇ⌧ࡍࡿ㸬✵Ẽࢱࣥࢡࡣ㸪ᾋຊࢱࣥࢡࢆව⏝࡛ࡁࡿ㸬ࡓࡔࡋ㸪✵Ẽὶࡣ୍᪉ྥ࡟࡞ࡿ࠿ࡽ㸪ᩚὶᘚࡀᚲせ㸪࠿ࡘࢱ࣮ࣅࣥࡶ୍᪉ྥὶᆺࢆ౑⏝ࡍࡿࡇ࡜࡟࡞ࡿ㸬
ᅗ 2New OWC ࡟ࡘࡁ㸪ḟࡢࡼ࠺࡟ࡲ࡜ࡵࡿ㸬(3)
(1) L ᆺࢲࢡࢺෆ࡛ධᑕἼ࡜ඹ᣺㐠ືࡍࡿỈᰕ࢚ࢿࣝࢠ࣮ࢆ฼⏝ࡋ㸪୍᪉ྥ✵Ẽὶࢀࢆసࡿ㸬ࡇࡢ✵Ẽὶ࡛ࢱ࣮ࣅࣥⓎ㟁ᶵࢆ㥑ືࡋ㟁ຊ⏕⏘ࡍࡿ㸬(2) ࡇࡢỈᰕ㐠ືࡀ㸪ᘧ(2)ࢆ‶ࡓࡍࡼ࠺࡟ࢩࢫࢸ࣒ࢆᵓᡂࡍࡿ㸬(3) ✵Ẽὶࡣపᅽ࣭኱ὶ㔞࡛࠶ࡿ㸬ᩚὶᘚ࡟ࡼࡿഹ࠿࡞࢚ࢿࣝࢠ࣮ᦆኻࡶຠ⋡పୗ࡟ᑐࡋ↓ど࡛ࡁ࡞࠸㸬㧗ຠ⋡ᩚὶᘚࡢ㛤Ⓨࡀ㸪ࡇࡢ◊✲࡟࠾ࡅࡿ㘽࡟࡞ࡗ࡚࠸ࡿ㸬(4) ᅗ 2 ࡛ࡣ㸪2 ಶࡢࢳ࢙ࢵࢡࣂࣝࣈ࡟ࡼࡾᩚὶᘚࢆᵓᡂࡋ࡚࠸ࡿ㸬ࣂࣝࣈ๓ᚋࡢᅽຊᕪ࡛㛤㛢ࡍࡿ⮬ືᘚ㸬ᘚࡢᅽຊᦆኻࢆ࡝ࡇࡲ࡛ῶࡽࡏࡿ࠿㸬࠿ࡘ⪏ஂᛶࡢࢡࣜ࢔ࡀ๓ᥦ࡟࡞ࡿ㸬(5) ௒ᅇࡣᾋయᆺ࡞ࡢ࡛㸪ᾋయᏳᐃࡢࡓࡵ㸪᣺Ꮚᘧ࡟࠾ࡅࡿ active damping ἲ(4)ࢆཧ⪃࡟ࡋࡓ㸬ࡋ࠿ࡋ㸪✵Ẽࢱࣥࢡᦚ㍕ࡢᙳ㡪ࡀ࣐࢖ࢼࢫస⏝ࡋ㸪᣺Ꮚᘧࡼࡾࡶຠᯝῶᑡ࡟࡞ࡾࡸࡍ࠸㸬
4㸬 New OWC ࡟࠾ࡅࡿࣃ࣓࣮ࣛࢱࢲࢡࢺෆỈᰕ࡟ᑐࡍࡿຊࡢᖹ⾮࠿ࡽ㸪ᘧ(3)ࡢ㐠ື᪉⛬ᘧࡀᡂࡾ❧ࡘ㸬(mm  mh ) x  ( N 0  N ) x  ( K h  K m ) x F0 sin Zt (3)

ࡇࡇ࡛㸪 x㸸Ỉᰕࡢࢲࢡࢺ㍈᪉ྥኚ఩㸪 N0Ỉᰕࡢ㐀Ἴࢲࣥࣆࣥࢢಀᩘ㸪 NỈࣆࢫࢺࣥ㈇Ⲵࡢࢲࣥࣆࣥࢢಀᩘ㸪Kh㸸Ỉᰕࡢ㔜ຊ᪉ྥ᚟ඖຊࡤࡡಀᩘ㸪Km㸸Ỉࣆࢫࢺࣥ࡟ാࡃ✵Ẽᙎᛶ࡟ࡼࡿࡤࡡᐃᩘ㸪ω㸸ධᑕἼࡢ෇࿘ᮇmm㸸Ỉᰕ㐠ື㒊㉁㔞ࡣᘧ(4)࡛♧ࡉࢀࡿ㸬

Uy2 Bld mm(4)

ρỈࡢᐦᗘ㸪 y2 ࢲࢡࢺࡢ⦪ᖜ㸪B ࢲࢡࢺࡢᶓᖜ㸪ld㸸Ỉᰕࡢධཱྀ࠿ࡽ㹊Ꮠᆺᆶ┤㒊➃㠃ࡲ࡛ࡢ඲㛗௜ຍỈࡢ㉁㔞 mh ࡣ㸪ᘧ(5)࡟♧ࡉࢀࡿ㸬

2 U sin k n hu
1§·n 1k n ¨ k n h  sin k n h ¸

2
©
¹
B
^sin k n (h  y1 )  sin k n (h  y1  y 2 )`k0f¦

mh(5)

Knᘧ(6)ࡢ㛵ಀࡀ࠶ࡿἼᩘ㸪h㸸Ỉ῝㸪

Z2g

k n tan k n h g㸸㔜ຊຍ㏿ᗘN0Ỉᰕࡢ㐀Ἴࢲࣥࣆࣥࢢಀᩘࡣᘧ(7)㸬(6)

48

渡部富治，浦島三朗，河合秀樹·§ 4 UZ¸¨¨ k Z sinh k 0 h ¸ u¹
© 0 0

B
^sinh k 0 (h  y1 )  sinh k 0 (h  y1  y 2 )`k0N0(7)

ࡇࡇ࡛ k0 ࡣᘧ(8)ࡢ㛵ಀࡀ࠶ࡿἼᩘ㸬

Z2Z0(8)

k 0 tanh k 0 h gsinh 2k0h  2k0h (9)

 NỈࣆࢫࢺࣥ㈇Ⲵࡢࢲࣥࣆࣥࢢಀᩘࡣᘧ(10)㸬

Na13 x1 U1

(95.8 u 10 2 a) 2(10)

ࡇࡇ࡛ a1✵Ẽᐊ㟼Ỉ⾲㠃✚㸪ρ1 ✵Ẽᐦᗘ㸪a㸸ࢱ࣮ࣅࣥ✵Ẽ㏻㐣㊰㠃✚㸪x1㸸ࢲࢡࢺෆỈᰕ┤ゅ᩿㠃ࡢධཱྀ࠿ࡽࡢ㊥㞳㸬

N0㸻N

(11)

ࡢ࡜ࡁ㸪impedance match ࡜࠸࠸㸪ྠ᫬࡟Ỉᰕ㐠ືࡀඹ᣺≧ែ࡟࠶ࡿ࡜㸪Ⓨ㟁ຠ⋡ࡣ᭱㧗࡟࡞ࡿ㸬㸦᭱㐺᮲௳㸧௨ୖࡢゎᯒ⤖ᯝࢆ⏝࠸࡚㸪New OWC 200kW 1/25 ࢫࢣ࣮ࣝࣔࢹࣝࡢタィ࣭〇సࢆᐇ⾜ࡋࡓ㸬5㸬㸬 1/25 ࢫࢣ࣮ࣝࣔࢹࣝ
ᅗ 3 ࡣ New OWC 200kW ࡢ 1/25 scale model㸦ᾋయᆺ㸧࡛࠶ࡿ㸬ᅗ 4 ࡟㸪ࡑࡢᵓ㐀ഃ㠃ᅗࢆ♧ࡋࡓ㸬Ỉ῝㸸h=0.5m,
ᖜ㸸Bw=0.6m ࡢ㸰ḟඖ㐀ἼỈᵴ࡟ᾋ࠿࡭㸪Ἴ㧗㸸H㸻4cm,6cm,8cm࿘ᮇ㸸T=1.0s,㹼2.0sࡲ࡛ࡢ㛫 0.1s ࡎࡘኚ໬ࡉࡏ㸪つ๎Ἴධຊ࡟ࡼࡿ࢚ࢿࣝࢠ࣮ኚ᥮ຠ⋡ ᐃࢆ⾜ࡗࡓ㸬ᅗ 3 ࡛ࡣ㸪Ỉᵴྑ➃࡛㐀ἼࡉࢀࡓἼࡀ㸪ᕥ࡬ྥ࠿ࡗ
࡚㐍ࡳ㸪New OWC ࡢྑ➃ධཱྀ㸦Ỉ㠃ୗ㸧࠿ࡽࢲࢡࢺෆ࡟ධࡿ㸬ᅗ 3 200kW New OWC 1/25 scale model Ɫᑠ∾㧗ᑓ 

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洋上浮体型波力発電装置の大型化

ᅗ 4 200kW N-OWC 1/25 model side viewධᑕἼ㧗 H ࢆࢲࢡࢺධཱྀ๓᪉࡛ィ ࡋ㸪ᘧ(12)࡟ࡼࡾධᑕࣃ࣮࣡( ࢆィ⟬ࡋࡓ㸬
2E2k 0 h ·Z§
1 §H·¸TB¨ ¸ Ug ¨¨1 k 0 © sinh 2k 0 h ¸¹4 ©2¹(12)

௒ᅇࡢ௦⾲ⓗᐇ㦂᮲௳ࡢ࡜ࡁ㸪E㸻3.09W
H = 0.08mT = 1.2sἼ㛗㸸λ= 2.048m 
6㸬㸬 Ỉᵴᐇ㦂ᅗ㸳ࡣ㸪ᾋయᆺࡢ New OWC ࡀ㸪Ἴᾉᾏ㠃࡛࡯ࡰ㟼Ṇ≧ែࢆಖࡘࡓࡵࡢἼຊ฼⏝ཎ⌮ࢆㄝ᫂ࡋࡓࡶࡢ㸬఩┦ᕪࡢ࠶ࡿ㸰ࡘࡢἼࢆ⤌ྜࡏ㸪ᾋయ࡟ᑐࡍࡿἼຊࡢᡴࡕᾘࡋ㸦X㸪Y & Pitching direction㸧ࢆࡍࡿ㸬᣺Ꮚᘧ࡟ᛂ⏝ࡋᡂᯝࢆᚓ࡚࠸ࡓ᪉ᘧ㸬(4)
௒ᅇࡢ New OWC ࡟ᑐࡋ㸪ࡇࡢ᪉ᘧࡣணᮇࡋࡓຠᯝࡀ⌧ࢀ࡞࠿ࡗࡓ㸬Ἴ࢚ࢿࣝࢠ࣮ࡣᾋయ࡟྾཰ࡉࢀ㸪⤖ᯝ࡜ࡋ࡚ᾋయࡀᦂືࡋ㸪ࢲࢡࢺෆ࡟ධࡿἼ࢚ࢿࣝࢠ࣮ࡣῶᑡࡋࡓ㸬Ⓨ㟁ຠ⋡ࡀ኱ᖜ࡟పୗࡋ㸪ࡸࡴ࡞ࡃᐇ㦂᪉㔪ኚ᭦ࢆྵࡵ᳨ウࡋࡓ㸬ࡘ࠸࡟ᾋయᆺࢆ◊✲ᑐ㇟࠿ࡽእࡋ㸪௦ࢃࡾ࡟ᅛᐃᆺ࡟ኚ᭦ࡋ࡚ᐇ㦂ࢆ⥅⥆ࡋࡓ㸬
ᅗ 5 Stabilizing of the Body by Active Damping

50

渡部富治，浦島三朗，河合秀樹

ࡇ࠺ࡋࡓ⤒㐣ࢆ⤒࡚㸪⿦⨨ࡀᾋయᆺ࠿ࡽᅛᐃᆺ࡟ධࢀ᭰ࢃࡗࡓ㸬ᅗ 6 ࡣࡇࡢ෗┿࡛㸪⿦⨨ୗ㒊࡟ࣇ࣮࣒ࣞࢆᤄධࡋ㸪㔜ࡾ࡛⿦⨨ࢆ㸪ࣇ࣮࣒ࣞ࡟ྥࡅᢲࡋ௜ࡅ㸪Ỉᵴᗏ㠃ୖ࡟⿦⨨ࡀᅛ╔ࡋ࡚࠸ࡿ㸬ࡇࢀ࡟ࡼࡾ㸪Ἴᾉ࡟ࡼࡿᾋయ㟼Ṇࡀ୙せ࡟࡞ࡾ㸪New OWC ᮏ᮶ࡢ◊✲࡟ᑓᛕࡍࡿࡇ࡜࡟࡞ࡗࡓ㸬ᑐ㇟ࡢ⿦⨨ࡣ㸪ධຊ 3W ࢡࣛࢫ࡛࠶ࡿ㸬ࢱ࣮ࣅࣥ࠾ࡼࡧⓎ㟁ᶵࡣᕷሙ࠿ࡽධᡭ࡛ࡁ࡞࠿ࡗࡓ㸬㍈ὶࢱ࣮ࣅࣥࢆ
タィ࣭⮬సࡋࡓ㸬ࡋ࠿ࡋࢱ࣮ࣅࣥฟຊ ᐃࢆㅉࡵ㸪ࢱ࣮ࣅࣥ࡬ࡢ✵Ẽධຊ ᐃࢆヨࡳࡓ㸬ࢱ࣮ࣅࣥධཱྀࡢᅽຊ࡜ὶ㔞 ᐃࢆࡋ࡚㸪ධຊࢆィ⟬ࡋࡓ㸬
ᅗ 6 The New OWC being fixed on the bottom
7㸬㸬 ᐇ㦂⤖ᯝ࠾ࡼࡧ⪃ᐹ
ᘧ(12)ࡢධᑕἼࣃ࣮࣡E ࡣ㸪⿦⨨࡟ࡼࡾධ᤼ཱྀࡢ✵Ẽὶࣃ࣮࣡Pair ࡟ኚ᥮ࡉࢀࡿ㸬Pair ࡣධ᤼ཱྀ࡟࠾ࡅࡿྜィ࡟࡞ࡾ㸪ᘧ(13)࡛♧ࡉࢀࡿ㸬
Pair

1
33
Ua o (v air
1  v air 2 ) 2(13)

ࡇࡇ࡛ ao㸸ධ᤼ཱྀ⤠ࡾࡢ㠃✚㸪vair1㸸ධཱྀ⤠ࡾࡢὶ㏿㸪vair2㸸᤼ฟཱྀ⤠ࡾࡢὶ㏿
vair1㸸ධཱྀ⤠ࡾࡢὶ㏿ࡣ ᘧ(14)࡛♧ࡉࢀࡿ㸬v air1

2'p1 U (14)

ࡇࡇ࡛ Δp1㸸ධཱྀ⤠ࡾࡢᅽຊᕪ

vair2㸸᤼ฟཱྀ⤠ࡾࡢὶ㏿ࡣ ᘧ(15)࡛♧ࡉࢀࡿ㸬v air 2

2'p 2 U (15)

ࡇࡇ࡛ Δp2㸸᤼ฟཱྀ⤠ࡾࡢᅽຊᕪ
ධᑕἼࣃ࣮࣡E ࡜㸪ධ᤼ཱྀࡢ✵Ẽὶࣃ࣮࣡Pair࡜ࡢẚࢆኚ᥮ຠ⋡ η ࡛♧ࡍ࡜ᘧ(16)࡟࡞ࡿ㸬K Pair E (16)

ᐇ㦂⤖ᯝࢆୖグ᪉ἲ࡛ᩚ⌮ࡋ⾲ 1 ࡟♧ࡋࡓ㸬࡞࠾ ᐃタഛࡀ୙༑ศ࡛࠶ࡗࡓࡓࡵ㸪ᅽຊᕪ ᐃࡢ⢭ᗘపୗ࡟ᑐ
ࡍࡿᑐ⟇ࡀ࡛ࡁࡠࡲࡲᐇ㦂ࡋࡓ㸬ࡇࡢ⌮⏤࠿ࡽ㸪⾲ 1 ࡟ࡣ௦⾲ⓗࢹ࣮ࢱ㸦ᐇ㦂࿘ᮇ T= 1.2s, 1.5s, 1.9s㸧࡟࡜࡝ࡵࡓ㸬




51

洋上浮体型波力発電装置の大型化

⾲ 1 ᐇ㦂⤖ᯝ
H
cm
4.0

6.0

8.0

HincidHchamb

PairE

η

T

observecm

output

input

eff.

peri

W

W%s

2.49

0.3

0.004

0.25

1.6

1.2

4.06

0.9

0.022

0.85

2.6

1.5

4.64

1.4

0.5

1.28

39

1.9

3.99

0.6

0.02

0.653.1

1.2

5.94

1.15

0.085

1.82

4.7

1.5

7.01

3.0

1.92

2.93

65.5

1.9

5.21

0.8

0.02

1.1

1.8

1.2

7.84

2.6

0.24

3.17

7.6

1.5

9.41

3.6

4.14

5.28

78

1.9cm


ᅗ 7Efficiency of the New OWC η⾲ 1 ࡢ⤖ᯝ࡟ࡘ࠸࡚⪃ᐹࡍࡿ㸬ⱞປࡢᮎ࡟ᚓࡓ㸪᪂ࡋ࠸⿦⨨࡟ᑐࡍࡿ᭱ึࡢᐇ㦂⤖ᯝ࡛㸪࡯ࢇࡢ୍㒊ࡀなࡅࡓ࡜࠸࠺ẁ㝵ࡢࡶࡢ࡛࠶ࡿ㸬ຠ⋡㸦ࣆ࣮ࢡ್ 78%㸧ࡀᴟࡵ࡚㧗ࡃ㸪௒ᚋࡢ᳨ウࢆᚅࡗุ࡚᩿ࡍࡿࡢࡀⰋ࠸࡜ᛮࢃࢀࡿ㸬ࡋ࠿ࡋ㸪Ⓨ᝿ࡢ≺࠸࡛࠶ࡿ͆࢔ࣥࢸࢼ⌮ㄽࡢᐇ⌧͇ࡢ᪉ྥ࡟㸪┠ⓗ࡜ࡍࡿⓎ㟁ࢥࢫࢺపῶࡀᏑᅾࡍࡿࡽࡋ࠸ࡇ
࡜࡟㛫㐪࠸࡞ࡉࡑ࠺࡛࠶ࡿ㸬≉ᛶ࡟ᙳ㡪ࢆཬࡰࡋࡓࡶࡢ࡟ࡣ㸪ࡲࡎἼ࿘ᮇ T㸪Ἴ㧗 H ࡀ࠶ࡾ㸪ࡼࡾ T ࡢᙳ㡪ࢆὀ┠ࡋ࡚࠸ࡓ㸬⾲ 1 ࡛ࡣ㸪ࣃ
࣮࣡E ࡢᙳ㡪ࡀ┠❧ࡗࡓ㸬ḟࡀ⪃࠼ࡽࢀࡿ㸬ࣔࢹࣝᐇ㦂ࡢࣃ࣮࣡ࣞ࣋ࣝࡣᴟࡵ࡚ప࠸㸬ᩚὶᘚ࡟ࡼࡿ࢚ࢿࣝࢠ࣮ᦆኻࡣぢど࡛ࡁࡠ≧ἣ࡟࠶ࡗࡓ㸬ᘚᮏయ㉁㔞࡟ᑐࡋ㸪✵Ẽຊࡀ࠶ࡲࡾ࡟ࡶᚤᙅ࡛࠶ࡗࡓ㸬ࡑࢀࡣ✵ẼᐊෆࡢỈᰕ᣺ືࡀ㸪᭱㐺್ 1/2 ࡟ᑐࡋ㸪1/2.6 ௨ୗ࡛࠶ࡗࡓࡇ࡜࠿ࡽࡶศ࠿ࡿ㸬ᾏᇦ㐠㌿࡛ࡣ㸪ࡇࡢᚰ㓄ࡀ࡞࠸㸬8㸬㸬 ⤖ゝ(1) ᾋయᆺࡣ⿦⨨࡟ධᑕࡍࡿἼ࢚ࢿࣝࢠ࣮ࡀῶᑡࡋ㸪┠ⓗࡢᐇ㦂ࢆㅉࡵࡊࡿࢆᚓ࡞࠿ࡗࡓ㸬ᑐ⟇ࡀᚲせ࡛࠶ࡿ㸬(2) ᐃᆺ࡟ኚ᭦ࡋ㸪New OWC ࡢ᭷ຠᛶࡀ࡯ࡰ☜ㄆࡉࢀࡓ㸬ࡋ࠿ࡋ㸪◊✲ࡣึᮇ≧ែ࡟࠶ࡾ㸪௒ᚋࡢ⥅⥆ࡀ኱ษ࡛࠶ࡿ࡜⪃࠼ࡿ㸬(3) ᾋయࡢἼᾉ୰࡟࠾ࡅࡿᏳᐃᛶࢆ㧗ࡵࡿࡓࡵ㸪ᮏ᱁ⓗ◊✲ࡀᮃࡲࢀࡿ㸬

52

渡部富治，浦島三朗，河合秀樹(4) 㧗ᛶ⬟ᩚὶᘚ࡟ࡼࡾ New OWC ࡢ≉ᛶࡀᕥྑࡉࢀ࡚࠸ࡿ㸬እ㒊࢚ࢿࣝࢠ࣮࡛᧯సࡍࡿ౛࠼ࡤ㟁☢᧯స᪉ᘧ࡞࡝ࡢ㛤Ⓨࢆࡍࢀࡤ㸪ᩚὶᘚ≉ᛶࡣ㣕㌍ⓗ࡟ྥୖࡍࡿ࡛࠶ࢁ࠺㸬ᮏ◊✲ࡣ㸪Ɫᑠ∾ᕤᴗ㧗➼ᑓ㛛ᏛᰯᏛ⏕ㅖྩࡢ༞ᴗ◊✲ㄢ㢟࡟ྲྀࡾୖࡆࡽࢀࡓඹྠ஦ᴗ࡟ࡼࡿ㸬Ꮫ⏕ㅖྩࡢ༠ຊ࡟ᑐࡋᚰ࠿ࡽឤㅰࡋࡲࡍ㸬ᩥ   ⊩(1)Watabe T. : Utilization of the Ocean Wave Energy, FUJI Print Co. Ltd. Muroran, Feb. 2008.
(2)Watabe T. and Kondo H. : Pat. No.2539742, Pendulor wave energy converter, 1996
(3)Ώ㒊㸪Ἑྜ㸪ᾆᓥ㸸≉㢪 2010-153409ὒୖᆺἼຊⓎ㟁⿦⨨(4)Ώ㒊㸸≉チ 4448972, ᾋయᆺἼຊⓎ㟁⿦⨨㸪2010

