4.3.2. Norms and calculations options<br>

### 4.3.2. Norms and calculations options

Edition window contains three tabs: „General”, Names patters”, „Results units”.

Tab „General”

Here in fields: „Norms package”, „Compartments heat calculations Norm”, „Heat losses Norm”, „SZE Norm” (norm for calculations of seasonal energy demand) is displayed the actual package of norms, on which the calculations of Instal-heat&energy programs are based. The User can here change the norm package.

Program performs calculations of heat losses. As additional calculation functions following fields are available for selection:

- „Perform calculations of seasonal energy demand”,

- „Calculate condensation inside partitions”,

- „Hide graphically non-cooling partitions”.

From other options it is necessary to select calculation method of building heat loss, hest loss by partitions to the ground as well as calculation method taking into consideration interruption in central heating system operation.

Selection of option “Calculations of seasonal energy demand” will automatically determine the selection of heat loss to “detailed”. This calculation method guarantees giving of required amount of data indispensable for calculations of seasonal energy demand.

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.

The calculation option „Hide graphically non-cooling partitions” enables disregarding in building the graphical non-cooling partitions – internal partitions with declared equal temperature in compartments on both sides of partition. Selecting this option enables loading of building structure from Instal-therm program with disregarding these partitions, which does not change the calculations result, but makes the tables more clear.

Button „Catalogue service” enables selection of catalogues of climatic data and heaters. After clicking the button „Catalogue service” the User has a possibility of selection of climatic data from the tab “Climatic data” and heaters from the tab “Heaters”.

In the left window „Other catalogues” you can find the catalogues of climatic data that are available in program catalogues database. In the right window „Catalogues in project” there are catalogues used in project, from which climatic data for calculations will be selected.

At the beginning of work with program the right window is empty. The User should select from catalogue base this one, which he will then use in project. Clicking the chosen one in left window and using the transfer key the User moves it to adjacent window. In this way the catalogue will be used in project. If the User wants always make use of chosen catalogue, he should select the field „Load always”. At the selected catalogue appears the icon ”Catalogues always loaded”. In this way each new opened project in program has automatically loaded catalogue of climatic data. After program closing the catalogue selection will not be deleted. This procedure can be performed for any required number of catalogues.

The User can also transfer to window „Catalogues in project” all catalogues present in catalogue base by means of button „Transfer all”.

Deleting of project catalogues can be done by the User by means of analogical buttons with arrows in opposite direction.

On both lists before catalogue name a symbol can appear. It means, that a catalogue is equipped with system of graphical information. This information can be always called by means of key F1 during selection of catalogue or element from this catalogue.

On the list of catalogues used in project will appear also symbols „Z” and „U”. These symbols mean:

- „Z” – catalogue is always read from a disc (is loaded in each project). It can be achieved by selecting field „Load always” for selected catalogue (catalogues). At such catalogue appears symbol .

- „U” – means, that the catalogue is used in actual project. At such catalogue appears symbol .

Button „Recalculate partitions dimensions” enables performing of recalculation of selected partitions dimensions. This function is particularly useful by calculations of seasonal energy demand or during thermal calculations for files saved in other normative version. The User does not have then to enter and calculate dimensions required by specific version for each partition. Selecting in left window the partitions dimensions used in program and in right window these dimensions, which the User wants to have calculated and completed in partitions table of „Building structure” and confirming this operation with „OK” key will cause executing of command. During this operation program calculates partitions dimensions according to numerical values declared in „Expression variables”. Remember, that this command works only one time and is not a calculations option for all partitions.

! It is important to select only these dimensions, which are really used in project by the User. If partitions dimensions are given in light, then for recalculation should also be selected “in light”. Otherwise this command will not be performed.

Using the button „Recalculate partitions dimensions” the User can perform for example following operations:

- From dimensions in axes to outer dimensions,

- From dimensions in light to outer dimensions,

- From dimensions in axes to dimensions in light,

- From outer dimensions to dimensions in light.

! Possible options of partition dimensions recalculation depend on norm program version.

Tab „Names patterns”

This option is used for defining of names patterns for new generated objects, that is partitions definitions, storeys, flats, compartments. The program has default assigned names patterns for some objects. These patterns can be also edited by the User. It is possible to enter the name pattern in empty field.

Principles of creating of names patterns:

1. Entering the symbol „#” in empty field causes defining of name by numerical variables. Every digit of number means one „#” symbol. For example definition of pattern „#” means, that the scope of such name will not exceed the scope of numbers from 0 to 9.

2. Entering the symbol „$” in empty field causes defining of name by letter variables. Every name of element entered in this way will begin with letter „A” and it will name the element with successive letters of Latin alphabet.

3. Initial value of numerical data can be declared by the User in fields on the right side of edition window: . For example declaring of “0” value means numbering from digit 0

4. Entering the character „>” means, that variable part of name can exceed the allowable scope resulting from the presence of characters, for example „>#” means, that scope of names will exceed the scope of one-digit numbers.

5. Entering of spaces between symbols of variables, such as for example „# #” will cause incorrect generating of object name. For example definition of pattern such as „Partition # #” is incorrect.

6. The User can also create a pattern of composite name. It consists of names of several objects. It contains references (relations) to names of other objects. Correctly constructed patterns of composite names include references to names of superior objects. Incorrect constructed names contain references to the level of subordinated objects. Such name will not be generated.

Examples of names patterns construction:

· Pattern of storey name means, that a new storey will be named with number 1, the next one with number 6 and so on. Scope of names will exceed the scope of one-digit-numbers.

· Pattern of partition definition name means, that the name of partition definition will begin with digit 0 and the scope of names will exceed the scope of one-digit-numbers

· Correctly constructed pattern of a composite name – name of compartment refer to the storey name. Correctly constructed name includes relations to higher level – that means names of superior objects [FLAT], [STOREY].

Edition window for „Names pattern” includes following fields:

Pattern of partition definition name

At the beginning of work with project the program does not enforce to the User any name – the Field remains empty! As a result in position “Partitions definition” every new partition will have a name – „no name”. The User can enter a name for this partition in an edition window, (see chapter 2.4). In this way each partition will be named by the User separately. It is also possible to enter in field “Pattern” our own name pattern describing partitions definition. In this way definitions of partitions will be named with successive variables according to defined names patterns.

Pattern of storey name

The program will automatically enforce the pattern of storey name. Variables „>#” mean, that every successive entered storey will be named in succession 0, 1, … 11 and so on. The User can declare in field “Initial value of interchangeable part of pattern” naming of partitions starting from required number.

Pattern of flat name

The program will automatically enforce the pattern, „>##” what means, that the flat will have a two-digit name and the variable part of name can exceed it – allowable scope resulting from the presence of “#”-marks.

Pattern of compartment number

It is constructed as a composite name, recalling to the storey name. It means, that the compartment name will include the storey name.

Pattern of thermal zone name

Entered pattern of thermal zones names „>$” means that every successive thermal zone will be named with successive letter of alphabet. This field is displayed for calculation option “Perform calculations of seasonal energy demand”.

! The User can specify the initial value of variable part of pattern only with numerical variables.

Tab „Results units”

The User can here select the results units, which can be given as follows:

- Unit of energy in:

- MJ, GJ, kWh,

- Unit of power in:

- W, kW, MW.