« Back


Hydrosystem 250px

Heat loss and Pressure Drop Calculations

Heat loss and Pressure Drop Calculations

Hydrosystem software performs heat loss and pressure drop calculations as well as nominal size selection for the pipeline networks, transporting compressible or incompressible one phase fluids, as well as two phase gas-liquid mixtures. It is widely used in power, oil refinery, petrochemical, gas, oil, chemical and other industries. Different parameters of the process pipings, main lines, heating and gas-distributing systems and other pipe networks can be calculated using the program. Hydrosystem allows to calculate overground and undergroud piping systems of any complexity (including networks with loops). The analysis results can be used for pumps, compressors, control and safety valve selection, to ensure piping systems reliability and efficiency.

Hydrosystem performs three main types of analysis:

  • Isothermal flow pressure drop calculation (assuming that fluid temperature is constant),
  • Branch NS selection based on entered node pressures and branch flow rates,
  • Non-isothermal calculation (considering heat losses and temperature drop factors).

Isothermal flow pressure drop calculation and NS selection.
Software allows performing various tasks depending on calculation type and data entered (node pressures, demands, fluid parameters, pipeline structure):

  • Selecting inner branch diameters and isothermal pressure drop calculation on the basis of terminal node pressures and branch flow rates (NS selection),
  • Flow capacity calculation with given terminal node pressures,
  • Isothermal pressure drop calculation with given branch flow rates or/and node pressures,
  • Different combination of calculation types mentioned above.

Non-isothermal Analysis.
This module performs hydraulic, heat losses and temperature drop calculation. It considers environmental data, wall material, pipeline location (indoors, outdoors, underground, in underground duct, in tunnel), insulation and jacket material properties as well as their changes along the pipeline.

Two Phase Gas-Liquid Flow Analysis
Two phase flow modules performs pressure drop calculation with given branch flow rates or/and node pressures, as well as heat losses, temperature drop and flash calculations. The program analyses and defines flow patterns, void fraction, parameters of flow for each phase, automatically finds places of boiling and condensation and switches between one phase and two phase modeling. Hydrosystem utilizes a number of methodologies for different two phase flow calculations, from which the user can flexibly select the most appropriate methods for any given task. This selection can be defined by user via special method selection XML rule file.

Graphic User Interface is simple and user-friendly. By default the graphic window displays the pipeline flowsheet in a way that minimizes intersections between different pipeline branches. The wide set of navigation tools, different levels of detailing help to analyze the pipeline structure. Precise 3D graphic representation and graphic editor allows creating the ?copy? of real pipeline. One may also specify the raster background (for example, a city or factory map) before entering flowsheet data and move the nodes directly on the map. The software in this case automatically determines the pipe lengths according to the map scale. This mode is especially useful for utilities network calculations.

The calculated results include fluid velocity, friction and local pressure drops, fluid properties, NPSH and others. The accuracy of calculations is ensured by automatic recount of fluid properties and flows at every pipeline component as well as by detailed component calculations in accordance with correlations by Idelchik, Miller and other sources, as well as modern two phase flow methods. The results may be shown on the pipeline graph by introducing different colors for different values of specific parameter. For example, one can easily determine a component with maximum pressure loss value.

The software package also includes the following modules:

  • Library calculating properties of individual fluid components, oil fractions and their mixtures in liquid and gas phases. Program database contains more than 1600 components.
  • WaterSteamPro module more accurately calculates water and steam fluid properties on the basis of IAPWS-IF97 equations.

For more advanced fluid properties and phase equilibrium calculations the program can use Simulis Thermodynamics library by ProSim company, which is delivered as a separate product.

A built in Report Generator allows to preview and print the output documents, as well as to export them to various formats for further use. End users can customize the documents (for example, add a company logo) via the Designer tool.

Head profile diagram in MS Excel may be constructed in order to assist in water network calculations.

The program can import piping geometry and data from different Plant design system via PCF file format. Graphic pipeline representation may be exported to DXF format.

System Requirements: Intel-compatible computers under Windows XP/Vista/7.


« Back