Copia de Copia de Refrig Calc

8/4/2019 Copia de Copia de Refrig Calc

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Pressure conversions PSI PSIA Inches of Hg

Enter PSI 95 95 109.696 193.4131737

Enter PSIA 15.696 1 15.696 2.035928144

Enter inches Hg 2.035928144 1 15.696 2.035928144

Enter kPa 6.893 0.999995341 15.6959953 2.035918657

Enter mm Hg 51.715 1.000004789 15.6960048 2.035937895

Enter bar 0.06895 1.000292125 15.6962921

Mpa 3.66 530.9709773 545.666977 1080.800146

Temperture conversions Fahrenheit Rankine Celsius

Enter Fahrenheit 130 130 590 54.44444444

Enter Rankine 570 110 570 43.33333333

Enter Celsius -48.5 -55.3 404.7 -48.5

Enter Kelvin 271 28.4 488.4 -2

Volume conversions Cubic inches Cubic feet Cubic yard

Enter cubic in. 46656 46656 27 1

Enter cubic feet 27 46656 27 1

Enter cubic yard 1 46656 27 1

P=pressure

V=volume

T=temperture

Charle's law V1/T1=V2/T2

Enter 3 of the 4 values

Enter Volume 1 100 100

Temperture 1 Fahrenheit 163.4567901 Fahrenheit

Enter Volume 2 81 81

Temperture 2 Fahrenheit 45 45 Fahrenheit

General law of Perfect Gas (P1*V1)/T1 = (P2*V2)/T2

Enter 5 of the 6 values

Enter PSI 1 180 180 PSIEnter volume 1 72 72 Units

Enter temp. 1 fahrenheit 110 110 Fahrenheit

Enter PSI 2 3 3 PSI

Enter Volume 2 72 72 Units

Enter temp. 2 fahrenheit -408.1924641 Fahrenheit

PSIA 1 Volume 1 PSIA 2

Boyle's law 187 15 151

P1*V1=P2*V2 187 15 151

Volume 1 T. (Rankine)

Charle's law 950 540

V1/T1=V2/T2 950 540

General law of perfect gas PSIA 1 Volume 1 T. (Rankine) PSIA 2

(P1*V1)/T1 = (P2*V2)/T2 200 30 585

200 30 585 169.2307692

PSI Volume 1 Fahrenheit PSI

185.304 30 125 154.5347692

Dalton's law



Pt=p1+p2+p3+p4 Gas 1 8

Pt=total pressure Gas 2 15

Gas 3 23

Gas 4 14

Gas 5 92

Gas 6

Gas 7

Gas 8

Gas 9

Gas 10

Gas 11

Total 152

Inches of

PSI mercury(Hg)

Enter PSI 14.696 14.696 29.92

Enter Hg. 29.92 0.068045727 29.92

PSI kPa

Enter PSI 30 30 206.7

Density =mass./volume

Water = 62.4 lbs/cu. ft.

Liquid

Pounds/cu. ft. liquid 75.228

Specific Gravity 1.205576923

air weighs 0.07655 lbs./cu. ft. Specific Gravity is the relation of

1 cu. ft. gas weighs 0.53585 to water(if liquid) or air(if gas)

S.G. 7 water weighs 8.33 pounds per gal

air weighs 0.07655 pounds per cu

S.G. 7

1 cu. ft. weighs 0.53585 API 11.5

SG 0.98951049Kg/m3 1207

lb/ft3 75.3168 SG 0.9875

API 11.79113924

lb/ft3 75.288

Kg/m3 1206.11376

g/cm3 1

lb/ft3 62.43 1 lb = 0.453592 kg

oz/in3 0.578 1 lb = 453.592 g

lb/in3 0.036 1 g = 0.002204 lb

1 kg = 2.20462 lb

Convert inch vacuum to PSI 1 g = 0.001 kg

Input inch vacuum 3PSIG for low side of compression ratio -1.48 -1.473

Compression ratios for refrigeration

Input high side pressure gauge amount 400

Do not input in. vacume

Input low side pressure gauge amount -1.48

Compression ratio 31.37:1



Volume of pipe

diameter inch 10

length inch 6

mat. lbs./cu.in. 0.043

lbs. in container

volume cu. in. 471.238898 20.26327262

half cyl. cu. in. 235.619449 10.13163631

Density input lbs./cu.in. lbs./cu.ft. lbs./cu.yd.

lbs./cu.in. 0.02143347 0.02143347 37.0370362 999.9999763

lbs./cu.ft. 75.288 0.043569444 75.288 2032.776

lbs./cu.yd. 1000 0.021433471 37.037037 1000

kg/cu.m. 593.276 0.02143343 37.0370367 999.9985742

kg/cu.cm

g/cu.m.

g/cu.cm. 0.549 0.019764 34.27407

Density =mass./volume

Energy conversion BTU/lb. F kJ/kg Centigr calorie/gram centig

BTU/lb. F 1 1 4.1868 1

kJ/kg Centigrade 4.1868 1 4.1868 1calorie/gram centigrade 1 1 4.1868 1

kilocalorie/kilogram centigrade 1 1 4.1868 1

joule/gram centigrade 4.1868 1 4.1868 1

joule/kilogram centigrade 4186.8 1 4.1868 1

Recovery tank capacity wc * .8 + tw = gw @ 80%

Water capicity in pounds 35

Tare weight 14.35

Gross weight at 80% full 42.35

Metric Prefixes

exa(E) 1,000,000,000,000,000,000 0.00000003

peta(P) 1,000,000,000,000,000 0.0000003

tera(T) 1,000,000,000,000 0.000003

giga(G) 1,000,000,000 0.00003

mega(M) 1,000,000 0.0003

kilo(k) 1,000 0.003hecto(h) 100 0.03

deka(da) 10 0.3

unit of measure 1 3

deci(d) .1 30

centi(c) .01 300

milli(m) .001 3000

micro(u) .000001 30000

nano(n) .000000001 300000



pico(p) .000000000001 3000000

femto(f) .000000000000001 30000000

atto(a) .000000000000000001 300000000

Material Temperature Lb./ft^3 ft^3/lb.

air 70 0.075 13.3333333

water 70 62.4 0.01602564



kPa mm Hg bar Mpa

654.8380512 4912.90147 6.55006

6.893032118 51.71475231 0.068929864

6.893032119 51.71475232

6.893 51.71451135

6.893065132 51.715

3660 3.66

Kelvin

327.4444444

316.3333333

224.5

271

Volume 2

18.57615894


990

990 562.7368421


30 495

30 495

Volume 2 Fahrenheit

30 35



product

lon & 62.4 lbs./cu. ft.

bic foot

1 in³ = 16.3870 cm³ 1 m³ = 61023.744 in³

1 in³ = 1.638706e-05 m³ 1 m³ = 35.3146 ft³

1 ft³ = 28316.846 cm³ 1 m³ = 1.30795 yd³

1 ft³ = 0.028316 m³ 1 cm³ = 0.061023 in³

1 yd³ = 0.764554 m³ 1 cm³ = 3.531466e-05 ft³

1 yd³ = 764554.861 cm³ 1 cm³ = 1.307950e-06 yd³



kg/cu.m. kg/cu.cm g/cu.m. g/cu.cm. Density

593.2760681 0.000593278 593276.0681 0.59327824

1206.033144 0.001205997 1206033.144 1.205997112 0.013282329

593.2766031 0.000593276 593276.6031 0.593275935

593.276 0.000593276 593276 0.593276

kilocalorie/kilogram joule/kilogram centigrade

1 4186.8

1 4186.81 4186.8

1 4186.8

1 4186.8

1 4186.8



Work=Force x Distance

Force in lbs 30

Distance in ft. 13

ft-lbs. 390

Horsepower

Pounds 1050.45

Feet 16

Minutes 0.5

Ft. lbs./ minute 33614.4

Horsepower 1.018618182

12,000 BTU's = 1 Ton SEER Sq. Ft. / Ton

SEER rating (low, med, high) med high 800

Enter house Sq. ft. 2500 700 low 600

Minimum Tons needed 3.6 med 700

Estimated tons needed 3.9

Elect. Heating/Sq. ft. To melt one lb. of ice it takes 144

Enter Sq. ft. 1530 One ton or refrigeration means 28

Elect. Service (120, 240, etc.) 120 Divide by 24 and 288000/24=120BTU's required 76500

Minimum Watts required 22414.29827

Watts required 23000

Amps required 192

Minimum Amps required 186.7858189

cubic inches of pipe

Inner diameter of pipe 1

length in inches 12

Cubic volume in inches 9.424777961

Refrigeration Rating

Ton(s) 3

Elect. Service 240BTU's required / hour 36000

Watts required / hour 10547.90507

Kilowatts / hour 10.54790507

Horsepower / hour 14.14497126 horsepower equals watts/745.7

Amps required / hour 43.94960445 watts equals horsepower*745.7

Circumference of a circle Circumference

diameter 4 12.56637

Circumference = diameter*pi

Drive gear dia. (input) 144 144

Driven gear dia. (output) 1.5 1.5 Output : Input

Gear ratio 96 96 : 1

Drive gear RPM 96 96

Gear ratio 19.27 19.27

Driven gear RPM 1849.92

Matching gear sets

Drive RPM 96 96

Matching gear set ratio 5 5



Number of gear sets 2 2

Driven RPM 2400

do not include the drive shaft gear or the driven shaft gear in the gear set number

Torque in Ft.-lbs. 480

Force in lbs. 80 80

Distance in Ft. 6 6

Torque input ft.-lbs. 480 480

Output ratio 19.27 19.27

Input ratio 1 1

Torque output ft.-lbs. 24.90919

BTU's 288000 288000

temp differance 27 27

Lbs water 10666.67

Compression ratio = Absolute discharge pressure / Absolute suction pressure

PSIG

Discharge pressure 50

Suction pressure 10Ratio 2.6 to 1

Inch Hg vacuum 14

PSIG -6.87674656

Belt drive motor Motor RPM * input pully size / output pully size = output RP

Motor RPM 1750 1750

Input pully 1 1

Output pully 5 5

Output RPM 350

Horsepower from RPM

Force in lbs. 30

Distance in Ft. 0.1RPM 1800

Torque (ft-lbs) 3

Horsepower 1.028179741



BTU's

8,000 BTU's/2000 lbs.(144*2000=288,000) in a 24 hour period.

0 BTU's per hour





Fresh air infiltration/ventilation

House sq. ft. 3500

Ceiling height 9

% air change 20

Ft.^3/hr. 6300

Ft.^3/min 105

Load on heating equipment due to ventilation

Indoor temperature 70

Outdoor temperature 17

CFM outside ventilation air 105

BTU's/hr. needed due to ventilation 6010.2

Load on cooling equipment due to ventilation

Outdoors BTU/lb. 37.68

Indoors BTU/lb. 28.2

CFM outside ventilation air 210

Heat added due to ventilation 8958.6 BTU/hr.



A BTU is the amount of heat to raise 1 lb. of water 1 degree fahrenheit

kW/hr. to BTU/hr Kw/hr. BTU/hr.

1.32 4505.16

BTU/hr. to kW/hr. BTU/hr. kW/hr.

4506 1.320246

Elect. Heating/Sq. ft.

Enter Sq. ft. 1530

Elect. Service (120, 240, etc.) 120

BTU's required 76500

Minimum Watts required 22414.29827

Watts required 23000

Amps required 192

Minimum Amps required 186.7858189

Refrigeration Rating

Ton(s) 3

Elect. Service 240

BTU's required / hour 36000

Watts required / hour 10547.90507Kilowatts / hour 10.54790507

Horsepower / hour 14.14497126 horsepower equals watts/745.7

Amps required / hour 43.94960445 watts equals horsepower*745.7

Known Answers

Volts(E) = 240 N/A

Amps(I) = 15 N/A

Ohms(R) = 16

Watts = 3600

Horsepower = 2.68452

Volts=Amps*Ohms E=I*R

Watts=Volts*Amps P=E*I

Volts(E) 120 120

Ohms(R) 14.11765

Amps(I) 8.5 8.5

Parallel Circuit

R1 10

R2 30

Total Resistance 7.5

Watts P=I*E 48

Amps I=P/E 0.4 0.4

Volts E=P/I 120 120

Volts E=I*R 240 240

Amps I=E/R 20 20

Ohms R=E/I 12

Impedance is the opposition to current in an AC circuit. In other words it is resistance. Measured in ohms.

Volts 120

Amps 3



Impedance 40



Air volume (cfm) = Air velocity (ft./min.) X Cross-sectional area (ft^2)

Square duct

length (inch) 9

width (inch) 8

air velocity (ft./min.) 700

Air volume (cfm) 350

Round duct

Inner diameter (inch) 16

air velocity (ft./min.) 700

Air volume (cfm) 977.3844

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Copia de Copia de Refrig Calc