it is just give the idea about systems and units

1. Chemical equipment's and design-
System and units
Azhaguvel.P

2. System and units
• A system is some collection of equipment and
operations, usually with a boundary,
communicating with its environment by a set
of input and output signals
Ex: pressure vessel, pile line
• units is used to quantifying the variables
Ex: kelvin(k)

3. • Types:
FPS- Feet (ft), Pound (lb), Seconds (sec),
Fahrenheit (`F)
CGS- Centimeter (cm), Gram (g), Seconds (sec),
Celsius (`C)
MKS- Meter (M), Kilogram (Kg), Seconds (sec),
Celsius (`C)
SI – Meter (M), Kilogram (Kg), Second (sec),
Kelvin (K)

4. Basic SI Units:
Physical quantity Name of SI unit symbol
Length Meter m
Mass Kilogram Kg
Time Second s
temperature Kelvin K

5. Derived SI units with special names:
Physical quantity Name of SI unit symbol
Frequency Hertz Hz= 1 c/s
Force Newton N= Kg.m/s^2
Work, energy Joule J= Nm
Power Watt W= J/s

6. Derived SI units with complex names:
Physical quantity Name of SI unit symbol
Area Square meter m^2
volume Cubic meter m^3
Density Kilogram per cubic
meter
Kg/m^3
Velocity Meter per second m/s
Angular velocity Radian per second rad/s
Acceleration Meter per second square m/s^2
Pressure (stress) Newton per square meter N/m^2
Dynamic viscosity Newton second per
square meter
N.s/m^2
Kinematic viscosity Square meter per second m^2/s
Specific heat Joule per kilogram
kelvin
J/Kg.K
Thermal conductivity Watt per meter kelvin W/m.K

7. Selection of decimal multiples and sub-
multiplies of units:
Factor to be
multiply
Prefix symbol
10^6 Mega M
10^3 kilo K
10^2 hector h
10^1 deca da
10^-1 deci di

8. Symbols for units:
Physical quantity symbol SI unit
Acceleration a m.s^-2
Acceleration of free
fall
g m.s^-2
area A m^2
diameter d m
force F N

9. Recommended practical units:
Quantity SI unit Other units
volume m^3 Liter(lit)
Milliliter(ml)
time s Day(d)
Hour(h)
Minute(min)

10. Conversion factors:
Quantity Existing unit SI unit Recommended
practical units
Length 1micro meter 1.00×10^-6 m 1μm
1 thou(mil) 2.54×10^-5 m 0.0254 mm
1 inch 2.54×10^-2 m 25.4 mm
1 ft 3.0480×10^-1 m 304.8 mm
1 yd 9.1449×10^-1 m 0.9144 m
1 mile 1.6093×10^3 m 1.6093 Km

11. Thank you