Imiterere ya HVAC

微 信 截图 _20220628084907

I 、 Ubushyuhe :

Celsius (C) na Fahrenheit (F)

Fahrenheit = 32 + selisiyusi × 1.8

Celsius = (Fahrenheit -32) /1.8

Kelvin (K) na Celsius (C)

Kelvin (K) = selisiyusi (C) +273.15

II conversion Guhindura igitutu :

Mpa 、 Kpa 、 pa 、 bar

1Mpa = 1000Kpa ;

1Kpa = 1000pa ;

1Mpa = 10bar ;

1bar = 0.1Mpa = 100Kpa ;

1atmospher = 101.325Kpa = 1bar = 1Kilogram ;

1bar = 14.5psi ;

1psi = 6.895Kpa ;

1 kg / cm2 = 105 = 10 mH2O = 1 bar = 0.1 MPa

1 Pa = 0.1 mmH2O = 0.0001 mH2O

1 mH2O = 104 Pa = 10 kPa

III speed Umuvuduko wumuyaga, guhindura amajwi

1CFM = 1.699 M³ / H = 0.4719 l / s

1M³ / H = 0.5886CFM

1l / s = 2.119CFM

1FPM = 0.3048 m / min = 0.00508 m / s

IV capacity Ubushobozi bukonje nimbaraga :

1KW = 1000 W.

1KW = 861Kcal / h = 0.39 P capacity ubushobozi bwo gukonjesha)

1W = 1 J / s

1USTR = 3024Kcal / h = 3517W capacity ubushobozi bwo gukonjesha)

1BTU = 0.252kcal / h = 1055J

1BTU / H = 0.252kcal / h

1BTU / H = 0.2931W capacity ubushobozi bwo gukonjesha)

1MTU / H = 0.2931KW capacity ubushobozi bwo gukonjesha)

1HP (amashanyarazi) = 0,75KW (amashanyarazi)

1KW (amashanyarazi) = 1.34HP (amashanyarazi)

1RT (ubushobozi bwo gukonjesha) = 3.517KW capacity ubushobozi bwo gukonjesha)

1KW capacity ubushobozi bwo gukonjesha= 3.412MBH

1P capacity ubushobozi bwo gukonjesha= 2200kcal / h = 2.56KW

1kcal / h = 1.163W

V 、Icyuma gikonjeshakwishyiriraho uburebure n'ubushobozi bwo gukonjesha :

1.5mm2 = 12A-20A (2650 ~ 4500W) 1P ~ 2P

2.5mm2 = 20-25A (4500 ~ 5500W) 2P

4mm2 = 25-32A (5500 ~ 7500W) 2P ~ 3P

6mm2 = 32-40A (7500 ~ 8500W) 3P ~ 4P

VI formula yo kubara firigo :

1 、 Guhitamo kwaguka kwaguka: tonone ikonje + 1.25%

2 power Kanda imbaraga: 1P = 0.735kW

3 charge Amafaranga ya firigo: Ubukonje (KW) ÷ 3.516 x 0.58

4 flow Amazi yo gukonjesha ikirere: Ubukonje (KW) difference itandukaniro ryubushyuhe ÷ 1.163

5 rate Igipimo cyamazi akonje yimashini ikonjesha amazi: Ubushobozi bwo gukonjesha (KW) × 0.86 difference itandukaniro ryubushyuhe

6 rate Igipimo cyamazi akonje yimashini ikonjesha amazi:(ubushobozi bwo gukonjeshaKW + gukanda imbaraga) × 0.86 difference itandukaniro ryubushyuhe

7 heating Igiciro cyuzuye cyo gushyushya QT = QS + QL

8 cool Gukonjesha ikirere : QT = 0.24 * ∝ * L * (h1-h2)

9 cool Ubushyuhe bukomeye bwo gukonjesha : QS = Cp * ∝ * L * (T1-T2)

10 ubushyuhe bukabije bwo gukonjesha ikirere : QL = 600 * ∝ * L * (W1-W2)

11 、Amazi akonjeinganoL / sV1 = Q1 / (4.187 △ T1)

12 volume Ingano y'amazi akonje : L / sV2 = Q2 / (4.187 △ T2) = (3.516 + KW / TR) TR , Q2 = Q1 + N = TR * 3.516 + KW / TR * TR = (3.516 + KW / TR) * TR

13 efficient Gukora neza muri firigo: EER = Ubushobozi bwa firigo (Mbtu / h) / gukoresha ingufu (KW);COP = Ubushobozi bwa firigo (KW) / gukoresha ingufu (KW)

14 performance Igikorwa cyo gukonjesha igice igice : NPLV = 1 / (0.01 / A + 0.42 / B + 0.45 / C + 0.12 / D)

15 load Umuyoboro wuzuye (icyiciro cya gatatu) : FLA = N / √3 UCOSφ

16 volume Umuyaga mwiza : Lo = nV

17 、 Umuyagagutanga ingano : L = Qs / 〔Cp * ∝ * (T1-T2)〕

18 、 Imbaraga zabafana : N1 = L1 * H1 / (102 * n1 * n2)

19 、 Imbaraga za pompe yamazi : N2 = L2 * H2 * r / (102 * n3 * n4)

20 diameter Umuyoboro wa diameter : D = √4 * 1000L2 / (π * v)

21 area Agace k'imiyoboro : F = a * b * L1 / (1000u)


Igihe cyo kohereza: Jun-28-2022