2.3. General data<br>

## 2.3. General data

The list of „General data” displayed in lower left window includes an icon and description for every successive position. General project data contain many values, which can be modified during project edition or after termination of this edition.

Before performing of calculations it is necessary to determine:

- catalogues of climatic data and heaters used in project,

- scope of calculation and method of creation of program object names master (for example definition of partition, thermal zone), etc.

- data concerning building and its localization.

Default active position is „Project description”. Here, on tab „Project” in field „Description” the project name should be entered, so that the project during its next loading could be identified. Other data concerning project, investor and designer can also be entered. These data are rather informative (address, telephone number etc.) and are nor necessary for calculations. Using appropriate buttons they can be opened or entered into address book. Using the address book enables automatic completion of mentioned fields with declared data.

In the next position „Norms and calculation options” is displayed an actual set of norms, on which the calculations are based. Normally always calculations of heat losses are performed. As additional functions we can select following:

- „Calculations of seasonal energy demand”,

- „Calculations of condensation inside the partitions”,

- „Hide graphically non-cooling partitions”.

Select from other possibilities the method of building heat loss calculation, heat loss by partitions to the ground and method of calculation taking into consideration operation intervals of central heating system.

Heat loss calculations are performed in program on the basis of one of two available options:

- “Detailed method”

- “Simplified method”

Selection of simplified method of heat loss calculations will automatically determine other options in such way, that the will be not available for the User and the heat loss of a building is calculated according to adequate algorithms and data assumed by default in program.

Selection of detailed method of heat loss calculations will enable declaring the heat loss calculations to the ground on the basis of following options:

- “Detailed method acc. to EN ISO 13370”,

- “Simplified method acc. to EN 12831”,

Depending on previously selected method of heat loss calculation, some data with various number of details are to be completed. Detailed method requires entering of more amount of data. Differences in calculations algorithm has been described in APPENDIX B. APPLIED NORMS AND CALCULATION METHODS

There is also to declare the method of consideration of operation intervals of central heating system by calculations of heat loss, which can be selected from following options:

- “None”

- “For compartments”

- For a building”

Declaring of one of these option will have an effect on the method of calculation of additional heat loss and on the method of data presentation. Selecting the option “For compartments” requires entering the data in compartment edition window, in which the presence of temporary temperature reduction has been declared. Calculations of additional heat losses occurring during temporary temperature reduction performed on the basis of option “For a building” are performed on the basis of some average data entered or calculated for a building.

Selecting the option “Calculation of seasonal energy demand” will automatically determine the selection of heat loss calculation method as “detailed”. This calculation method will guarantee presentation of required amount of data indispensable for calculations of seasonal energy demand.

Button „Catalogues” “Catalogue service” enables selecting of climatic data and heaters.

In position “Building data” are entered basic information concerning the construction type, air-tightness, building shielding class, its location as well as climatic data and basic geometrical dimensions determined for plan view of a building. It is also to determine the depth of building in the ground, depth of ground water as well as efficiency of heat recovery system. Depending on the selection of calculations option by assumption of temporary temperature reduction in compartment, some additional edition fields can be available. You can also find here the button “Catalogue service” enabling selection of climatic data catalogue.

In field „Location” select the place from catalogue of climatic data in which (or close to which) the building is located. The next meteorological station and corresponding climatic zone are selected automatically by the program. If the User will not declare the usage of climatic data catalogues, he must then fill in the fields „ Location” and „Outer air temperature”. Such method of data input can only be applied in emergency (lack of climatic data catalogues).

If the option of seasonal energy demand calculations will be selected, then it is necessary to complete the meteorological and actinometrical data. If the User did not select in field “Location” its name from climatic data catalogue, it is necessary to select the name of meteorological and actinometrical station by oneself. Fields “Meteorological station” and “Actinometrical station” should be then completed with the name of adequate station selected from loaded catalogue of climatic data. For that purpose just use a pop-up list available in each mentioned field and select an adequate location name.

If the location name has been selected from catalogue of climatic data, then the meteorological station and actinometrical station will be completed automatically, as complying with this selected location.

! Calculations of seasonal energy demand are possible only after loading of climatic data catalogue by the User.

In case of calculations of seasonal energy demand it is necessary to complete additional data concerning internal heat sources, as well as height and distance of elements shading the building. More information you will find in chapter 4.3.3.

In position “Heaters selection data” the User can select a program function enabling preliminary selection of heaters in compartments. After selecting the catalogues of heaters in project position „Norms and calculation options” and selecting the option „Switch on the heaters selection” the User is selecting default type of heater. Fields concerning default supply temperature of heater, cooling down of heating agent in heater and addition for thermostat are completed with values pre-defined in program. For this it is necessary to check in succession or complete these data depending on heating parameter in compartments. Additionally, using the button “Heater equipment” it is necessary to specify the way of heater connection to installation, type of housing, heater location and requirements concerning heater dimensions: height, length and width are specified by using the button “Heater dimensions limitations”.

The user can also select heaters from heaters available in firm catalogues and in these catalogues from always available – that means in the store or on special request. A declaration of such choice is made by selecting the window “Select available only in store” More information to this you will find in chapter 4.3.4.

Pre-selection of heater enables improving of work with the program, because this way in heated compartments a default type of heater is declared and it does not have to be selected in each compartment separately. The User can of course select in specific compartment other type of heater than default declared one, for example bathroom heater in bathroom.

If the User did not choose in position “Norms and calculations options” catalogues of heaters, which he wants to use in project, he can select in this section of program required heaters catalogues using the button “Catalogue service”.

Last position are “Expressions variables”. Expression variables are used for project parameterization. Parameterization consists in using the variables instead of numbers while specifying the dimensions or other values in program. Possibility of parameterization is particularly useful for auditors, who perform analysis of interdependences of annual energy demand on building parameters and calculate many construction variants of one object.

! It is recommended to declare the variables already at the beginning of work over the project. If you do so, it will not be necessary to perform manual changes of many data in the project.

Detailed description of individual fields of position „General data" are to be found in chapter 4.3, and the method of heat losses calculation and seasonal energy demand calculation has been described in - APPENDIX B. APPLIED NORMS AND CALCULATION METHODS .