Read about heat transfer coefficient | 9 Discussions | Page 1

  1. G

    Laminar flow in a tube, heat transfer coefficient-sanity check

    Hi there, Hopefully this is a very easy question and you all can just confirm this for me. When calculating heat transfer into a fluid from a heated tube, is it correct to say that the heat transfer coefficient is *not* dependent on the tube diameter? So, if we solve for T_{out}, we get...
  2. D

    Convective heat transfer coefficients of fuel oil?

    I'm setting up a thermal resistance network to determine the heat loss through the insulated wall of a heated fuel/crude oil tank but i cant seem to find values for the convective heat transfer coefficient of the fuel oil (kerosene) or the crude oil at elevated temperatures. I have only found...
  3. MexChemE

    Heat and mass transfer -- Boundary conditions & balance terms

    Hello, PF! Recently, while reading chapter 10 (microscopic energy balances) of the second edition of BSL, I found a minor discrepancy which is confusing me, especially when considering the mathematical analogies of heat and mass transfer. In section 10.1, the authors introduce Newton's law of...
  4. B

    Effect of air on condensing steam heat tranfer coefficient

    I am working on a model for predicting cooling in a system that evacuates a vessel and cools by evaporation of water and the water vapor is condensed in a tube and shell heat exchanger. My concern is the prediction of the steam side heat transfer coefficient as the air is removed from the...
  5. M

    Heat Transfer Coefficient

    Hello, I have a swimming pool with a waterfall feature. I need to know how much does the waterfall contributes to cooling the pool. I tried to use Newton's law of cooling, but I have a problem with the Heat Transfer Coefficient in this case. Following are the Givens: Waterfall Width= 5m...
  6. A

    Overall Heat transfer coefficient for a radiator

    Hello all. I need to design a radiator for 43kw heat dissipation. I have used the LMTD method for finding out the contact surface area of the radiator. But I have a small problem. I cannot find the area unless i know the overall heat transfer coefficient. Can somebody please give an estimate of...
  7. M

    Convective heat transfer coefficient

    Not sure if I'm getting this right, my answer seems very small, can anyone advise? Question- butanol at a temperature of 28oC is pumped at a velocity of 14ms-1 through a 100mm diameter tube kept at a wall temp of 90oC. The properties of butanol are below. Determine the convective heat...
  8. T

    Heat Transfer question, estimation of coefficients

    Hi, ive recently been given a series of questions on heat transfer to do and have done most of them with general ease, but this one question ive been stuck on for ages and i cant seem to figure out: "A double pipe heat exchanger is made up from a length of 25mm i.d. steel pipe of 2.5mm...
  9. SalfordPhysics

    Thermal Conductivity of Steel experiment

    1) PROBLEM: Task is to find the thermal conductivity of steel experimentally. I have conducted relevant experiments and I am trying to solve for the thermal conductivity (k) itself. My final however is ten times too large in size, and I am having trouble identifying where the error is coming...
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