Wiki User
Answered 2009-04-16 07:40:49
pips are generally cylindrical in structure of amount of heat loss through pipe is given by the formula Q= 2 pi k L(T1-T2)/ln(r2/r1) where k=conductivity of material of which pipe is made T1= temperature of inside layer pipe T2=temperature outside layer of pipe L= length of pipe r1= inner radius r2=outer radius ln=natural logrithem pi=22/7 the above condition applies for steady state flow,single layer over cylinder and neglecting conductivity convection to take conductivity convection into account term Q* must be added Q*=2 pi L{ r1 hi(Ti-T1)+r2 ho(T2-To)} hi=convective coefficient for inside layer ho=convective coefficient for outside layer Ti= temperature of inside space of pipe To=temperature of outside space of pipe for unsteady condition there is another formulaa
Your Answer
Still have questions?
Related Questions
Formula for measuring heat loss or heat gain?
Do a Google search on: ACCA Manual J
Why does insulation around the pipe stop it freezing?
Insulation slows down the loss of energy (heat flow) from the water in the pipe to the surroundings. It will protect from losing heat by convection (wind moving past the pipe removes heat faster than stationary air). If the temperature is cold enough, for a long enough time, eventually it will freeze, even with insulation.Insulation slows down the loss of energy (heat flow) from the water in the pipe to the surroundings. It will protect from losing heat by convection (wind moving past the pipe removes heat faster than stationary air). If the temperature is cold enough, for a long enough time, eventually it will freeze, even with insulation.
What is heat loss formulae of water flow through PPR-C pipe line?
you have first to know the thermal conductivity of PPR that you are dealing with. normally, this is in range between 0.1 to 0.24 W/MK .then you apply this formula Q(IN WATTS) =Thermal Conductivity/MK)*A( surface area for the pipe M2 )temperature difference between fluid inside pipe and temprture of pipe surface K)/(thickness of the pipe M)
What is the formula for heat loss calculation in insulations?
http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/heatcond.html
Is precipitation heat gain or heat loss?
heat loss
Does copper pipe coming from attic that feels cold when AC is running need to be insulated?
Yes. This will prevent heat loss and condensation.
What is the difference between closed heat pipe and open heat pipe?
Pressure rises in the tube.
Heat loss in copper pipes?
The thickness of the pipe will effect the loss rate. Best thing to do is buy thermal isulating foam, normally comes in tubes will a slit down one side so it can be slid over the pipe easily. Also depending on the the fluid inside the conduit ( pipe ) and diameter, ambient temp, and location, you may be able to use a product such as heat trace. It is an electrical wrap that uses voltage and amperage to create heat to shield from the outer elements...
What is the formula on speed and height through a steam pipe?
What is the formula for speed and height thru a steam pipe
What is the chemical formula for pipe?
Pipe can be made from a wide variety of materials, so there is no single chemical formula for it.
Disadvantages of heat pipe?
Heat pipe collectors must be mounted with a minimum tilt angle of around 25° in order for the internal fluid of the heat pipe to return to the hot absorber.
When water is flowing through seamless steel pipe that is 36 in in diameterthe rate of discharge is 9500 gpm if the lenght of pipe is 2400 ft the friction loss in the pipe is?
49.334 psi is the pressure loss and to get the friction loss you would need to know the smoothness of the inside of the pipe.
Is condensation heat gain or heat loss?
heat loss blah blah
What is the net gold loss formula?
formula of "Net Gold loss
What are the types of pipe losses?
friction loss head loss loss due to sudden enlargement
Difference between shock loss and friction loss?
Friction loss is the loss of energy that occurs in pipe flow due to viscous effects generated by the surface of the pipe. Shock loss is an huge loss that causes an adverse effect on an insurerâ??s assets.
A thermos bottle has a shiny interior What type of heat transfer does it prevent?
It prevents heat loss through radiation.It prevents heat loss through radiation.It prevents heat loss through radiation.It prevents heat loss through radiation.
What is heat gain and heat loss?
heat gain is when an object get hotter. heat loss is when an object gets colder.
What is the formula for the R - value?
simply put r-value= temperature differenceXareaXtime/heat loss the standard uses 75degrees on one side of a substance and the heat loss is measured across the substance this heat loss is then quantified by a temperature measurement of the noon standard temperature this becomes the temperature difference in the equation. the area is just that, in square feet and the time is in hours and the heat loss in Btu's. you dandan the heatin man
What is the pipe leterall formola?
a formula is an equation, rule, principle, or other logical relation. The pipe lateral formula is Ao equals external pipe surface area (feet 2 per feet pipe).
What is the diameter of a steel pipe using a vernier caliper?
formula: (R+2t)=D where, R-radius or pipe t-thickness of pipe D-diameter of pipe. by using above formula we get the diameter of a steel pipe, by using vernier caliper
Is evaporation heat gain or heat loss?
For what? It requires a heat gain for the water, but a heat loss for whatever the water is in contact with.
What is the fastest method of body heat loss?
Loss of heat by radiation from the surface of the body, in the form of infra-red heat rays, is the fastest method of body heat loss.
What is the pipe fitting formula for a 22.5 degree?
Pipe size times 0.707
What can I do to conserve energy loss on hot water pipes?
You can insulate the hot water pipes with spiral-wrap fiberglass insulation, foam tube insulation, or fiberglass pipe covers. These will all help reduce heat loss.
