Formula for Heat loss in a pipe?
How does color affect heat loss?
Rather than thinking of them as absorbers of heat, darker colors are better absorbers of light and thereby become better radiators of heat. Consider the following: The color of an object depends on the wavelengths of colors reflected from the object. A red apple is red because red wavelengths in w…hite light are reflected and other wavelengths are absorbed. If a red apple were to be illuminated by light that had no red wavelengths, the apple would appear almost black. When a black object is illuminated by white light, all wavelengths are absorbed and none are reflected -- that's why the object appears black. When light is absorbed by a black object, the energy carried by the light doesn't just disappear. Rather, it raises the energy of the object doing the absorbing. The object, in turn, releases the absorbed energy by emitting longer wavelength, lower energy infrared (heat). This transformation of light into heat is the key to understanding the process because it accounts for the law of conservation of energy. Light just doesn't disappear when it strikes a black object, it's transformed into another kind of radiation that is either radiated from or retained within the black object. The darker the object, the better its emission of heat because, it is a better absorber of light. http://www.newton.dep.anl.gov/askasci/phy00/phy00156.htm ( Full Answer )
What is formula for calculation of line loss?
Line loss equations are complicated by transmission environment and temperature? Transmission env. - Include wire type, bus impedance in switching fields, etc. Temperature - Temperature can change the wire resistance and thus line loss. Electric energy is transported across the countryside with high…-voltage lines because the line losses are much smaller than with low-voltage lines. All wires currently used have some resistance (the development of high-temperature superconductors will probably change this some day). Let's call the total resistance of the transmission line leading from a power station to your local substation R . Let's also say the local community demands a power P=IV from that substation. This means the current drawn by the substation is I=P/V and the higher the transmission line voltage, the smaller the current. The line loss is given by P loss =I²R , or, substituting for I , P loss = P²R/V² Since P is fixed by community demand, and R is as small as you can make it (using big fat copper cable, for example), line loss decreases strongly with increasing voltage . The reason is simply that you want the smallest amount of current that you can use to deliver the power P . Another important note: the loss fraction P loss /P = PR/V² increases with increasing load P : power transmission is less efficient at times of higher demand. Again, this is because power is proportional to current but line loss is proportional to current squared. Line loss can be quite large over long distances, up to 30% or so. By the way, line loss power goes into heating the transmission line cable which, per meter length, isn't very much heat. ( Full Answer )
What is the formula for water flow in a pipe?
- volumetric water flow - liters per second (L/s) A_*_c_/1000_ =_vf "> A * c / 1000 = vf A = Inside area of the pipe (cm 2 ) c = Velocity of water (cm/s) vf = Water flow (L/s) Or - mass flow rate - kilograms per second (kg/s) m . _ = _ Ï _ *_c_*_A "> m . … = Ï * c * A m . = mass flow rate Ï = greek letter symbolizing density. Water's density is 1000kg/m 3 Remember to put all units correctly (kg, m, s) to get kg/s. ------------------------------------------------------------------------------ U can derive by experiment........ collect water per unit time.... change flow rate of water keep time const. then divide water collected in lit by time in sec u get volumetric flowrate.. and u can find velociy of waer if u know pipe dia by e formula: Q/v = (3.14/4) * d * d Q= vol. flow rate. v= velociy d pipe dia. If pipe dia is increase or decrese use coninuttyy eq. a1v1=a2v2 ( Full Answer )
What is the formula for heat?
Heat=Mass x Specific Heat x Change in Temperature or H=M x Sp. Ht. x ^T
Why do your pipes clang when the heat goes on?
Answer .
When the steam hits colder piping it turns to condensate and the steam hitting the water (condensate) produces hydraulic shock waves.
Why do pipes rattle when heat is turned on?
Answer .
Pipes rattle when heat is turned on because metal expands when heated up
Why is copper used for heating pipes?
Because it is EASY to use FAST to install gives up heat faster then steel or cast Iron and just about anyone above the age of 4 can solder it and it is light to handle
Formula of heat?
The formula for heat is changing based on a few different factors.For example some materials create heat because they are mixed whileothers must be burned to produce heat.
Head loss in a pipe?
when a pump is used to pump a fluid into a vertically arranged pipe , fixed upright; the fluid would reach a certain height at which point the fluid would stop in a pipe. this height at which the fluid has stopped propelling upward could be described as the head of water. this measure relate…s to the pump power . should a pipe system be used which is less than the head height then fluid will be seen to flow out and over the side of pipe. if the connecting pipe happens to be of longer measurement than the head, and hence when fixed at height is taller than the head height then the fluid will not likely be seen flowing out of pipe . if a pump is mounted within a basement of work hall, but the resulting pressure is utilised on the ground floor of same building then some pressure will be lost when pumping upwards , and could be described as head loss. ( Full Answer )
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 to find pressure loss in fire fighting pipe lines?
The British fire and rescue services use the following formula for calculating the pressure loss due to friction in firefighting hose:.
P f = 9000 f l L 2 / d 5 bar.
where.
P f is the frictional loss of pressure, in bar f is the friction factor f = 0.005 for 70 mm or 45 mm hose f = 0.0…07 for 90 mm hose (for 90 mm hose it is higher to allow for losses in the couplings, which are but 64 mm diameter) l is the length of the hose line, in metres L is the flow rate, in litres/minute d is the hose diameter, in millimetres.
The formula is approximate, and relates to internally lined hose in 25 metre lengths. You will find the formula in the old Manual of Firemanship, Book 7, Hydraulics, pumps and pump operation..
David Hayward, former MIFireE ( Full Answer )
What insulates against heat loss?
Thermal insulation hinders the loss of heat energy. Clothing actsas thermal insulation for human bodies. In buildings, thesematerials are often used as thermal insulation: plant straw, woodfiber, cellulose, polystyrene, vermiculite, urethane foam, perlite,recycled cotton denim.
How do you reduce heat loss in a house?
attic, wall and floor insulation, weatherstripping ,energy efficient windows sealing drafts to name a few.
What is the formula for profit and loss?
I have a question. If two persons A and B got the profit of 9600 and they shared the profit in 5:7 ratio. then what is the share of A. Give me the step by step solution. first i want to tell u that u wrote question in the answer coulumn well the answer of ur question is ; the sum of the ratio is 5…+7=12 share of A =5/12 MULTIPLY BY 9600 = 4000 share of B = 7/12 multiply by 9600 =5600 ( Full Answer )
How do you stop heating pipes from banging?
on a potable water system you can either use a water hammer arrestor or an air chamber. An air chamber is a length of pipe with a cap on it (6"-8") facing up
What is heat number of pipes?
It is a number that allows the pipe to be traced all the way back to the metal it was made from, important for quality control.
What trademen build heating pipes?
The installing tradesmen are Master plumbers /Gas fitters /steam fitters HVAC mechanics who install the piping and other related equipment
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 m…ay 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... ( Full Answer )
What is the formula for weight of water in a pipe?
First, get the volume of water in the pipe. Assume the pipe is completely full, and the formula for the Volume = Volume = Pi (3.14159) X Radius of pipe 2 X Length of pipe Then convert Volume to Weight. So, for 10 feet of 4" Inside Diameter pipe: Radius = 1/2 * Diameter = 1/2 * 4 inch …= 2 inch Length = 120 inches Volume = 3.14159 X 2 2 X 120 = 1,508 cubic inches 1 cubic inch of water = 0.036127 pounds So: 1508 cubic inches * 0.036127 pounds per cubic inch = 54 pounds. ( Full Answer )
Formula for hysteresis loss?
hysteresis loss= K B^1.6 egs/sec where k is STEINMEITZ coefficient and B is the maximum magnetic flux density
What is formula of loss on drying?
W2 - w3 / w2 -w1 x 100 w1 - wt of empty bottle w2 - wt of sample w3 - wt of bottle with sample after 1-3 hrs of drying in vacuum .
Formula of flow of the pipe?
The velocity of fluid in pipe is expressed as v=(4x q)/(DxDxpi).Where D is the inner pipe diameter and q is the volumetric flowrate.
What is pipe friction loss?
The energy lost through friction as a fluid flows through a pipe. The amount of energy lost is dependent on both the characteristics of the fluid (viscosity, density) and the pipe (roughness, diameter, length) as well as the rate of flow.
Why heat gained and heat loss?
Since heat flows from high temperature region to low temperature region so when a hotter body comes in contect with colder body then hotter body loses heat to colder body until both have same temperature.
What is the formula to layout pipe saddles for joining pipe at angles?
I edited and uploaded a program I wrote to calculate pipe saddle layout, pipe miter layout, and to calculate running offsets for piping runs. I have used similar programs in the past to get information to pipe fitters. I am using and evaluating a conversion program that limits what I can upload duri…ng the free trial period; so the sheets may be a bit awkward to use....let me know. Those of you who use the method of dividing a pipe in 16-divisions will note I have added 64-division points should you want to use these; the 64-divisions would be better to use if you were making a saddle template for larger pipe or for a saddle with a shallow angle. (I moved this to 'www.pipesaddlelayout.com) Let me know if it works for you or what seems confusing. Dave ( Full Answer )
What happens when you heat a metal pipe?
of course you have a wide range temperature range left unspecified, but generally as far as the physics of any metal (with variations) would indeed expand in both length and width by a small fraction of an inch. the problem often is that when metal heats then cools rapidly it will inevitably crack -… Matt ( Full Answer )
What is the formula for surface area of pipe?
2*pi*r*L where r is (outer) radius of the pipe (in case of the outer surface) nd L is the length of the pipe.
Give the formula of profits and loss?
a man purchased a dozen pens for rs 25 each and them at rs 28 each.find the total profit as well as the profit per cent on the transaction.
Does heat cause weight loss?
Sort of, but not really. The weight you lose by exposing yourself to heat is water loss due to sweating. You'll put that weight back on once you've quenched your thirst again. And going around thirsty and deydrated is not a healthy thing.
What is insensible heat loss?
Also Latent Heat Loss. The heat that is lost through the continuous, unnoticed water loss that occurs with vaporization accounting for 10% of basal heat production. Evaporation accounts for the greatest heat loss when body head increases.. Does not result in temperature increase of surrounding air.
How you can reduce radiation heat loss?
for instance, Heat loss through the roof of the house can be reduced by laying loft insulation. This works in a similar way to cavity wall insulation.
What is the formula to layout pipe miters?
There is no exact formula to lay out pipe miters, but there isinformation that must be known to calculate the layout. Thisincludes the diameter, wall thickness, angle, and offset.
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) ( Full Answer )
Can you heat up lead piping?
Yes, lead has a relatively low melting point and a poor thermal conductivity. Thus in a Sulphuric acid manufacturing plant, when small holes appear in the surface of the lead tanks containing the acid, it is simple to weld a lead patch over the hole. Most impressive!
How does respiration cause heat loss?
Thermoregulation is the ability of an organism to keep its body temperature within certain boundaries, even when the surrounding temperature is very different. This process is one aspect of homeostasis : a dynamic state of stability between an animal's internal environment and its external envir…onment (the study of such processes in zoology has been called ecophysiology or physiological ecology). If the body is unable to maintain a normal temperature and it increases significantly above normal, a condition known as hyperthermia occurs. This occurs when the body is exposed to constant temperatures of approximately 55° C, any prolonged exposure (longer than a few hours) at this temperature and up to around 70° C death is almost inevitable. The opposite condition, when body temperature decreases below normal levels, is known as hypothermia. Whereas an organism that thermoregulates is one that keeps its core body temperature within certain limits, a thermoconformer is subject to changes in body temperature according to changes in the temperature outside of its body. It was not until the introduction of thermometersthat any exact data on the temperature of animals could be obtained. It was then found that local differences were present, since heat production and heat loss vary considerably in different parts of the body, although the circulation of the blood tends to bring about a mean temperature of the internal parts. Hence it is important to identify the parts of the body that most closely reflect the temperature of the internal organs. Also, for such results to be comparable, the measurements must be conducted under comparable conditions. The rectum has traditionally been considered to reflect most accurately the temperature of internal parts, or in some cases of sex or species, the vagina, uterus or bladder. Occasionally the temperature of the urine as it leaves the urethra may be of use. More often the temperature is taken in the mouth, axilla, ear or groin. ( Full Answer )
Do condenser loss heat?
Of course it does since the temperature at the enter is not the same at exist . San
What is a heat no on pipe?
Used for inspection. Heat numbers make it possible to trace pipe from spools fabricated on a job to material documentation from a given melt. The matching documents will tell when and where the pipe was made, the material used and the pipe grade etc.
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.
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 formula for profit and loss excel formulas?
create a formula in cell C13 that determines whether you will make a profit or loss
How can a mammal reduce its loss of heat?
By growing a winter coat, (extra long hair during the winter) and wisely standing together in herds that increase the heat among all it members...
How do you prevent heat loss in a transformer?
Heat production can be reduced and it cannot be prevented. Reduce current density by increasing conductor cross section or increase core area to reduce copper content. In both cases there are limits. Answer If you prevented heat loss from a transformer, then its temperature would continue to ri…se until, possibly, its insulation fails. So, heat loss is essential! With power (transmission) and utility transformers, this is one of the reasons for them being oil immersed. In the case of the smaller, utility, transformers cooling results from oil which circulates, naturally, by convection through heat exchanger tubes on the outside of the transformer's tank. In the case of large power transformers, in addition to convection, the oil can be pumped through external heat exchangers which are then forced-air cooled or even cooled with water. The other reason for using oil, is its insulation properties which allows the transformer to occupy a far smaller footprint. ( Full Answer )
Why should heat loss be prevented?
because otherwise it ll be cold and ur house could go cold, damp, and horrible
Is hysteresis loss considered heat loss?
In general even though energy is lost during hysteresis it is not called as heat losses . Generally I 2 R losses are called as heat losses because in these tye of only in these energy is lost in the form of real heat
How does a thermostat prevent heat loss?
A thermostat does nothing to prevent the loss of heat. That's the job of insulation. All the thermostat knows is to turn the heater on when the temperature drops below some number.
What is the formula for pipe fitting?
I believe what you are really asking is "What are the standard allowances for length?" Or in other words, how long should the threads be on the pipe? In general, the thread legnth is equivalent to the nominal pipe diameter. That is, if you are working with 1" pipe, you want to have 1" of thread in t…he fitting. In actual practice, you will cut a somewhat longer thread, so you do not run out of thread before it is tight in the fitting. If you are working with plastic glue together pipe the same theory applies. The socket on the plastic fittings is eqivalent to the nominal pipe diameter. Another possible answer you may be seeking is how to figure the length of a pipe making a 45 degree bend. That is simply the square root of 2, or 1.414 times the offset distance. For example, if you are making a 45 degree bend that needs to go 6 inches ahead, you would need a piece of pipe 8.48 inches long. ( Full Answer )
What is the chemical formula for pipe?
Pipe can be made from a wide variety of materials, so there is nosingle chemical formula for it.
Is melting heat gain or heat loss?
Heat gain, otherwise, a heat loss would be like turning off theheat beneath a saucepan on the stove.
What is the formula for calculating loss?
You calculate loss the same as you would do profit income minus expenses (outgoings) = profit/loss If the answer is negative then you are making a loss, if the answeris positive then you are making a profit.
What are the formula for profit and loss in mathematics?
Formula: Profit = Selling Price (SP) - Cost Price (CP) Loss = Cost Price (CP) - Selling Price (SP)