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  • Audytor OZC, version 4.0
  • Audytor C.O., version 3.6
  • Audytor H2O, version 1.5

Audytor OZC, version 4.0

Company versions of this software are fully functional but they contain catalogues of pipes and/or devices manufactured by a given company and additional items selected from a full-range catalogue.

 Kisan OZC 4.0

Company version of the Kisan OZC software, version 4.0. Installation file: setupozc.exe. Once the file has been downloaded, it should be run to install the application.

General description of the software

The “Audytor OZC” software, version 4.0 is used to calculate the design heat power demand for individual spaces in a building and for the whole building and to calculate the seasonal heating demand for residential buildings.  Calculations are made according to the following standards:

• PN-EN ISO 6946 "Thermal resistance and heat transfer coefficient ",
• PN-91/B-02020 "Thermal protection of buildings" (as an option),
• PN-94/B-03406 "Calculations of heating demand for spaces with a cubage of up to 600 m3",
• PN-B-02025 "Calculations of seasonal heating demand for residential buildings" ,
• PN-82/B-02402 "Temperatures of heated spaces in buildings",
• PN-82/B-02403 "External design temperatures".

This software performs:

• Calculations of heat transfer coefficients for walls, floors, roofs and flat roofs,
• Calculations of heating demand for individual spaces,
• Calculations of heat power demand for the whole building,
• Calculations of seasonal heating demand for residential buildings,
• Calculations of indices of seasonal heat energy demand:
• EV [kWh / (m3 year)], EA [kWh / (m2 year)]
• EV [GJ / (m3 year], EA [GJ / (m2 year)]

The results of heat power demand calculations are used as starting data for the “Audytor C.O.” software, which is used for designing new central heating systems and for the quantity and quality regulation of the existing ones.

The “Audytor OZC” software enables the user to calculate heat losses for very large buildings. Below, limitations on the software’s data are given:

• Maximum number of defined space dividers - 16300,
• Maximum number of layers per one space divider - 16300,
• Maximum number of rooms - 16300.
• Maximum number of space dividers per one room - 16300.

A module calculating the seasonal heating demand for residential buildings has been added to the latest version of the software.  After the data necessary for heat power demand calculations is entered, the additional calculation of the seasonal heating demand does not require a great amount of effort due to thoroughly engineered data structure. It is also possible to quickly supplement data in the designs developed by the previous versions of the software, in order to calculate seasonal energy consumption.

Data input

Most data is inputted globally for the whole building (see Figure 1). This allows the user to avoid entering the same information many times, separately for each room. Data on space dividers adjacent to the ground is inputted in a form transparent for the designer. The software itself analyses the structure of space dividers and generates data necessary for calculations. That is why, the complicated methodology for calculating heat losses to the ground, set forth in PN-B-02025, does not make the design process difficult. The only data to be inputted separately for each room, when calculating the seasonal heating demand, is information on the shading degree of glazed space dividers (windows, French doors) and their angles of inclination to the level. In case of typical buildings, this data can be automatically generated by the software thus making it unnecessary for the designer to laboriously input data manually.

Figure 1. Data needed to calculate seasonal heating demand

In order to improve data transparency, as well as to enable the user to make variant calculations, the option of creating variables has been added to the software. The application of variables allows the user to fully parameterize his/her design. The simplest example of the use of variables can be the introduction of temperatures in rooms and zones by means of variables, e.g. TPOK in a room instead of the number 20, TLAZ in a bathroom instead of the number 25, etc. If for any reason (e.g. investor’s request) a need arises to change  temperatures in the selected type of spaces globally, then it will be enough to change the value of an appropriate variable  (e.g. TPOK from 20 to 21) and recalculate the design to obtain current results. Variables can be used to enter insulation thickness, values of heat transfer coefficients, etc.

Figure 2. Catalogue of building materials

The extensive catalogue of building materials (see Figure 2) with the option of adding information on the user’s own materials makes it unnecessary for the user to memorise their thermal parameters. The function automatically attaching information on materials used in the design makes it possible to freely transfer data between computers without the need for supplementing catalogues with materials added by the user. In accordance with the PN-91/B-02020 standard, data on building materials is divided into two categories, i.e. homogeneous materials and courses with heterogeneous structure.

Figure 3. Example of calculating heat transfer coefficient for external wall

Transparent dialogues, used to input data on space dividers (see Figure 3), streamline the process of calculating heat transfer coefficients for walls, floors, flat roofs, slab-on-grade floors and walls adjacent to the ground.

Functions automatically determining thermal transfer resistance, flat roof air layer resistance and resistance of the ground adhering to space dividers make it unnecessary for the user to read out any values from standards and tables.
It is also possible to directly enter heat transfer coefficients for standard space dividers (e.g. windows, doors, skylights, etc.).

The data management system allows the user to quickly transfer data on space dividers between designs, which enables the user to utilise the data inputted in his/her previous designs. With information on materials used in the design automatically attached to the data file, any data transfer to other computers should not present any problems.
When inputting space divider data it is possible to view its temperature distribution and check the internal surface of the space divider for water vapour condensation (see Figure 4).

Figure 4. Temperature distribution in a space divider

Figure 5. Calculating room heat losses

Calculation results

The calculation results are presented in both tabular and graphical forms (see Figure 6). The table content can be sorted according to a selected key and formatted, which facilitates the analysis of results. The results of calculations of heat transfer coefficients and room heat losses are presented in two forms. The first one is an abbreviated form including the summaries of the obtained results. The second one contains detailed information on calculations presented as traditional forms used in manual calculations of heat transfer coefficients and heat losses. This allows the user to fully document the calculations made.

Rys. 6. Temperature distribution in a space divider 

Rys. 7. Calculations of room heat losses

The results of heat power demand calculations for individual rooms, with the distribution of heat losses to adjacent spaces taken into account, can be exported directly to the “Audytor C.O.” software, which is used for designs of central heating systems.

All tables with the calculation results can be viewed on screen and printed on a printer and exported to other applications (e.g. worksheet, text editor, etc.). Before printing, the user can choose the size and format of page, font size, range of pages to be printed;  preview of the printout is also possible.

Catalogue data

Catalogue data on the radiators of the following companies is given in the current software version: