How it can be calculated the equivalent lenght of a coil used on a chiller.
This are the facts.
Chiller capacity 35000 BTU or 10Kw at 20 °C
The evaporator is a stainless tube coil
tube diam 19.05 mm 3/4" 1.25 mm thick
Tube lenght 18.5 m 60 '
I intend to change it to cooper tube 12 mm...
Here in my country the gas piping for low pressure is handled by the POOLE formula , for natural gas up to 200 mm water column.
The formula is as follow
D= ( F^2 * 2 * S* L / H )^1/5
where
D= DIAMETER [CM]
F= FLOW [M3/HOUR]
S= SPECIFIC WEIGHT [0.65 FOR NATURAL GAS]
L= LENGTH [M]
H= ALLOWED...
Hi all grinding people, where I can get a vendor or brand to supply solid carbide tip to made centerless blades.
I 'm looking for 1000 m (40") length .
Hope you could help me.
Thanks in advance.
devitg@ciudad.com.ar
Pardal
At this site there is a interesting aproach to use elliptical tube in finned coil exchangers.
http://www.begellhouse.com/journals/4c8f5faa331b09ea,1c21585a4c2de960,42a0fec2292f04fc.html
It seem to gain in eficience.
My concern is how it shall be take the stress at its so shaped tubes.
Will...
For a experiment I need a brine or liquid to be liquid at 120 °C .
Liquid gas , as air , oxigen or nitrogen is out of reach.
Maybe a combustion gas as propane or butane.
Of course safety is a concern , but it will be under good safety conditions.
Pardal
Talking about psichrometry
Given T in Kelvin or absolute temp
For Pws [presure water steam]
Is this formula valid ?
for Water air from 0 to 200 C degree
ln Pws= a/t + b+c*t+d*t^2+e*t^3+f*lnT
for the followings values
a -5800.2206
b -5.5162256
c -0.048640239
d 4.18E-05
e...
Hi all ,
As ever I see , when puting a regulating flow valve it is done downstream the condenser , or heat exchanger.
As the usually used GLOBE VALVE , it run too when regulating the pump flow.
For a PRESSURE ACTUATED WATER REGULATING VALVE.
There is any reason a valve vendor state it as...
Hi all ,
As ever I see , when puting a regulating flow valve it is done downstream the condenser , or heat exchanger.
As the usually used GLOBE VALVE , it run too when regulating the pump flow.
For a PRESSURE ACTUATED WATER REGULATING VALVE.
There is any reason a valve vendor state it as...
Hi all it is a POLL .
Would you please give the razon you draw in scale in ACAD.?
One of the most valuable feature of acad is the ability to draw in real unit just from intermolecular distance to stars distance .
One example is a old cad drawing named SOLAR
It come with the 1.2 versión , I...
Hi Spring people.
There is any way to calculate the deflection of a extension spring used as a two bearing beam.?
¦ load
-----------------------------------------
-----------------------------------------
^ ^...
Please give me a way to go where I can get the pressure vs temperature allowable for this specification.
Of course that it shall be at the ASA standars , but I have no way of get it, because it is sell.
I think that it should be vendors information wher I can see that table.
Hope you can help...
At a plant, I have compressed air at 7 to 8 bar relative flowing in a 2" cooper tube.
The normal air is token from ambient , ranging from 5°C 30% Relative Humidity [RH] in winter to about 35° 95% in summer after a rain.
The flow is 450 liter/m normal air .
I have allowable all year round...
On a high pressure 200 bar nitrogen cylinder there is a threaded port 24,40 mm diameter 14 tpi.
Which stsndard or denomination cover such thread??
Any help , welcome.
Thanks in advance.
Pardal
Which the best suited heat treatmet to make on suspension spring for race car's.
They range from 11 mm [ 7/16"] to 16 mm [5/8"] wire diameter .
Up to 150 mm [6"] coil diameter .
Up to 600 mm [ 24"] length.
It is a guess 52 RC hardenes .
The furnace will be electric heat...
As per HVAC method the the rectangular to round equivalence of duct is given by the following formula
b=(1.3*(A1*A2)^.625)/(A1+A2)^.25
It say that the both ducts have the same friction loos.
But from hydraulic books say that the hydraulic ratio shall be consider.
H ratio= area/wetperimeter...
