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  • Users: teknomania
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  1. teknomania

    Heat Loss from a Buried Pipe | Stagnant/No Flow Condition

    I have a transient pipe model (internal flow of water inside the pipe) that can calculate the water temperature distribution through the pipe length over time (solving convection-diffusion equation with heat sink). This pipe model considers the heat transfer (as loss from the water to the...
  2. teknomania

    Mutual Thermal Resistances between Pipe Layers

    Ref: Palsson, Halldor | Analysis of Numerical Methods for Simulating Temperature Dynamics in District Heating Pipes - please check pg. 62 at LINK (CLICK!) INTRO: In this reference, the mutual thermal resistances between layers as water-insulation, ground-surrounding, and insulation-ground are...
  3. teknomania

    Hydraulic Modelling - Heating Network

    In this task of mine, I need to develop a tool/software to carry out hydraulic analysis of a central heating network, formed with supply and return pipes so forming a multi-parallel loops in a closed circuit, as can be seen in the below picture. Can anyone suggest me some references especially...
  4. teknomania

    Heat Loss from Large Tanks

    Hi, I try to model a sensible stratified storage tank by use of multi-node method (splitting tank into segments in 1D). At this stage, I am in focus on the heat loss from the storage tank (in fact from each of these segments). So two case exists: (i) one idle period without charging or...
  5. teknomania

    Advanced Regression - Deriving New Equations

    Hello, During my tasks in different disciplines, I am reaching some new performance measure as according to the topic studied. I already used multi-regression in some and, if that was not enough to fit my data, I used interpolation method 'The Vandermonde Method' and lately discovered the...
  6. teknomania

    Effect of Supply/Return Temperature at Heat Production Efficiency

    I already have a graph showing the effect of supply/return temperature (to/from a district heating system) on the heat production efficiency (at a cogeneration cycle), taken from the IEA Report - Annex X: Interpreting the graph; while the heat demand (and other parameters) being same...
  7. teknomania

    Chamber Acting Like Outside Air

    Hello, I have the task of experimentally measuring the radiator performance according to varying outdoor temperature degrees. My plan for the test setup is to equip one box in another bigger box. The inner box (the heated space) will involve a radiator. While the volume between the inner box...
  8. teknomania

    Performance of Plate Heat Exchanger

    Hi All, I would like to develop a model to measure the performance of a plate heat exchanger (the model obtaining the return temperature and flow rate at the primary side according to the input values of supply temperature at the primary side and the supply and return temperatures together with...
  9. teknomania

    Performance of Chiller Plants

    Can any of you tell me how I can calculate the COP (efficiency or performance) of a chiller plant (of any type but in district cooling systems) according to varying degrees of supply temperature and return temperature (at district cooling network); and according to varying flow rates of the...
  10. teknomania

    Performance of In-House Cooling System

    Hi Guys, I am trying to find the equations to obtain the performance of an in-house cooling system (AHU, floor cooling, fan coil etc.). I want to find the performance equations (of an in-house cooling system) i.e. resulting in return temperature as a function of the supply temperature, the...

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