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FAQs

FAQ

NINAU HOU

ʻO wai nā ʻāpana nui o kahi ventilator?

ʻO nā ʻāpana nui, ke ʻano o ka peʻahi, ʻehā i ka helu: Kaha (V) Puhi (p) Pono (n) Ka wikiwiki o ka hoʻololi ʻana (n min.-1)

He aha ka Capacity?

ʻO ka mana ka nui o ka wai i hoʻoneʻe ʻia e ka peʻa, ma ka leo, i loko o kahi manawa, a ua hōʻike pinepine ʻia ma ka m.3/h, m3/min., m3/sec.

He aha ka Total Pressure a pehea wau e helu ai?

ʻO ka huina nui (pt) ka huina o ke kaomi paʻa (pst), ʻo ia hoʻi ka ikehu i koi ʻia e kū i nā kuʻekuʻe kūʻē mai ka ʻōnaehana, a me ke kaomi hoʻoikaika (pd) a i ʻole ka ikehu kinetic i hāʻawi ʻia i ka wai neʻe (pt = pst + pd ).ʻO ke kaomi ikaika e pili ana i ka wikiwiki o ka wai (v) a me ka ʻumekaumaha kikoʻī (y).

formula-dinamic-pressure

Ma hea:
pd= puʻe ikaika (Pa)
y=kaumaha kikoo o ka wai(Kg/m3)
v= ka wikiwiki o ka wai ma ka wehe ʻana o ka peʻahi i hana ʻia e ka ʻōnaehana (m/sec)

formula-kapa-paomi

Ma hea:
V= kaha (m3/sec)
A= ana o ka wehe ʻana i hana ʻia e ka ʻōnaehana (m2)
v = ka wikiwiki o ka wai ma ka wehe ʻana o ka peʻahi i hana ʻia e ka ʻōnaehana (m/sec)

He aha ka huahana a pehea wau e helu ai?

ʻO ka pono ka ratio ma waena o ka ikehu i hāʻawi ʻia e ka peʻa a me ka hoʻokomo ʻana i ka ikehu i ka mīkini hoʻokele kaʻa

kumu hoʻohua kūpono

Ma hea:
n= pono (%)
V= kaha (m3/sec)
pt= mana hoʻomoe (KW)
P= ka nui o ke kaomi (daPa)

He aha ka wikiwiki o ka hoʻololi?He aha ka mea e hoʻololi ai i ka helu o nā kipi?

ʻO ka wikiwiki o ka rotation ka helu o nā revolutions e holo ai ka fan impeller i mea e hoʻokō ai i nā koi hana.
Ke ʻano like ʻole ka heluna o nā kipi (n), ʻoiai e mau ana ka ʻumekaumaha kikoʻī o ka wai (?), e hana ʻia nā ʻano like ʻole:
Pili pono ka mana (V) i ka wikiwiki o ka hoohuli ana, nolaila:

t (1)

Ma hea:
n= ka māmā holo o ka hoʻololi ʻana
V= hiki
V1= mana hou i loaʻa ma ka hoʻololi ʻana i ka wikiwiki o ka hoʻololi ʻana
n1= ka wikiwiki hou o ka hoololi ana

t (2)

Ma hea:
n= ka māmā holo o ka hoʻololi ʻana
pt= kaomi piha
pt1= ka huina hou i loaa ma ka hoololi ana i ka mama o ka hoololi ana
n1= ka wikiwiki hou o ka hoololi ana

ʻOkoʻa ka mana i hoʻopaʻa ʻia (P) me ka cube o ka ratio hoʻololi, no laila:

formula-speed-rotation-abs.power_

Ma hea:
n= ka māmā holo o ka hoʻololi ʻana
P= abs.mana
P1= hoʻokomo uila hou i loaʻa ma ka hoʻololi ʻana i ka wikiwiki o ka hoʻololi ʻana
n1= ka wikiwiki hou o ka hoololi ana

Pehea e helu ʻia ai ka ʻumekaumaha kikoʻī?

Hiki ke helu ʻia ka ʻumekaumaha kikoʻī (y) me ke kumu hoʻohālike

kumu ʻumekaumaha

Ma hea:
273= ʻaʻole loa(°C)
t= ka mahana wai (°C)
y= ʻumekaumaha kikoʻī ea ma t C(Kg/m3)
Pb= kaomi barometric (mm Hg)
13.59= ʻumekaumaha kikoʻī mercury ma 0 C(kg/dm3)

No ka maʻalahi o ka helu ʻana, ua hoʻokomo ʻia ke kaumaha o ka ea ma nā ʻano wela a me nā kiʻekiʻe asl i ka papa ma lalo nei:

Mahana

-40°C

-20°C

0°C

10°C

15°C

20°C

30°C

40°C

50°C

60°C

70°C
Kiʻekiʻe
maluna
ʻilikai kai
i nā mika		 0

1,514

1,395

1,293

1,247

1,226

1,204

1,165

1,127

1,092

1,060

1,029
500

1,435

1,321

1,225

1,181

1,161

1,141

1,103

1,068

1,035

1,004

0,975
1000

1,355

1,248

1,156

1,116

1,096

1,078

1,042

1,009

0,977

0,948

0,920
1500

1,275

1,175

1,088

1,050

1,032

1,014

0,981

0,949

0,920

0,892

0,866
2000

1,196

1,101

1,020

0,984

0,967

0,951

0,919

0,890

0,862

0,837

0,812
2500

1,116

1,028

0,952

0,919

0,903

0,887

0,858

0,831

0,805

0,781

0,758
Mahana

80°C

90°C

100°C

120°C

150°C

200°C

250°C

300°C

350°C

400°C

70C
Kiʻekiʻe
maluna
ʻilikai kai
i nā mika		 0

1,000

0,972

0,946

0,898

0,834

0,746

0,675

0,616

0,566

0,524

1,029
500

0,947

0,921

0,896

0,851

0,790

0,707

0,639

0,583

0,537

0,497

0,975
1000

0,894

0,870

0,846

0,803

0,746

0,667

0,604

0,551

0,507

0,469

0,920
1500

0,842

0,819

0,797

0,756

0,702

0,628

0,568

0,519

0,477

0,442

0,866
2000

0,789

0,767

0,747

0,709

0,659

0,589

0,533

0,486

0,447

0,414

0,812
2500

0,737

0,716

0,697

0,662

0,615

0,550

0,497

0,454

0,417

0,386

0,758
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