Prezentare TEKNOSIM

8/11/2019 Prezentare TEKNOSIM

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TEKNOsim EuropeClimate Simulation

lindab indoor climate


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TEKNOsim simulation software for thermal indoor

climate.

Function

Simulation of indoor climate with computer support.

UseCalculation of heating and cooling

effects in all types of room.

Application

PC platform, Windows based.

Features

Can be used in all stages of the building process.

Gives documented accurate values.

Allows wide variation of input data.

Easy and quick to use.

Not tied to a specific manufacturer.

TEKNOsim Europe

Climate Simulation


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Climate simulationRapid developments in computer and calculation tech-

nologies have made it possible to study and modify a

building or a function in a room prior to construction.

This can save both time and resources during all stages

of a building project. Its safe to say that computerised

simulation is the modern day crystal ball!

Calculations about the indoor climate of a given room

are extremely complicated, and can in practice only be

achieved with the help of a computer. As software for

climate simulation has been available since the seven-

ties, we have learned more about the degree of impact

of different factors on the indoor climate of a room.

Understanding the heat storage in a room with thin

walls, ceiling and floor has made it possible to reduce

the installed cooling effect compared to earlier situa-

tions, while still satisfying indoor climate requirements.

Its well-known that the thermal climate in a room is

influenced by many different factors. What is probably

less known is how these factors individually influence

the indoor climate or the requisite cooling effect.

In the example below we compare how some of these

factors affect an office during the summer. Naturally, the

results only apply to the actual example, but can, to a

certain extent, act as guidelines for other rooms. The

conditions for the original office are shown on page 5.

Simulations were performed using TEKNOsim.

Room (15 m) with a window, 1.2m 1.6m, facing

south, double glazing with clear glass.

One person, one computer, normal lighting, all with an

operating time between 08:00 17:00.

Ventilation with 15 l/s at a supply air temp. of +19C.

In the light room, all wall surfaces, facades, and inner

walls of plasterboard with insulation. Wooden floor

and ceiling structures. No suspended ceiling.

In the heavy room, interior of outer facade is of

concrete, and floor and ceiling structures are also of

concrete. Inner walls as the light room. No suspended

ceiling.

For cooling effect calculations, max. indoor temp.

25C.

Predictably, an increase in the window area or a halving

of the suns rays has a significant effect. The impact

of the suns rays can be reduced with a blind or by

changing the windows. Another important factor is the

direction in which the facade faces. On the other hand

an increase in the outdoor temperature only has a minor

effect.

The percentage difference in the effect requirement

between the light and heavy rooms averages 33% for

the different situations. The difference in room tempera-

ture between the light and heavy room with no extra

cooling effect averages 7.5 C.


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Table 1.

Table 2.

Calculation

parameter

Light

room

(W)

Diff.

(%)

Heavy

room

(W)

Diff.

(%)

Original office 887 0 589 0

Suns rays -50 % 534 -40 347 -42Window area +50 % 1228 +38 809 +35

Facade facing north 398 -55 266 -56

With suspended

ceiling

883 -0.5 629 7

Vent. flow +50 % 825 -7 506 -15

Supply air temp. fr.

19 to 17 C

843 -5 532 -10

Outdoor vent. 15 l/s 1080 +21 789 +31

Internal load +50 % 1020 +15 720 +20

Outdoor temp.

raised by +3 C

922 +4 632 +6

Calculation

parameter

Light

room

(W)

Diff.

(%)

Heavy

room

(W)

Diff.

(%)

Original office 37.9 0.0 29.9 0.0

Suns rays -50 % 33.1 -4.8 27.5 -2.4

Window area +50 % 42.2 +4.3 32.3 +2.4

Facade facing north 31.1 -6.8 26.8 -3.1

With suspended

ceiling

37.9 0 31.3 +0.4

Vent. flow +50 % 34.9 -3.2 28.5 -1.4

Supply air temp. fr.

19 to 17 C

35.6 -2.3 28.3 -1.6

Outdoor vent. 15 l/s 41.1 +3.2 32.0 +2.1

Internal load +50 % 40.4 +2.5 31.3 +1.4

Outdoor temp.

raised by +3 C

38.8 +0.9 30.5 +0.6

TEKNOsimThe most important characteristic features of

TEKNOsim are:

The application fully supports Windows. This makes

it easy to use and understand, even if only used spo-

radically.

The software can be used during all stages of the

building process. Floors, walls and ceilings are easy

to define as light, medium or heavy structures if the

actual structure is not known.

Most input data is selected by a mouse click. Defined

structures for walls, windows, ceilings and floors, as

well as other features, are selected from a database

using dialog boxes.

Naturally, the software takes into account heat stor-

age in the building structures. The heating effect from

people and the cooling effects of Lindab Climate prod-

ucts influence the indoor temperature.

All information in the database is fully accessible so

each user can supplement, modify or remove objects.

An input data guide leads new users through all the

input data windows through to the results of the

process.

The software is general, i.e. you can choose whether

the software selects our products or not. We do not

want TEKNOsim to be another example of manufactu-

rer dependent software. When calculating the requisite

cooling effect the user can choose between air chilled

(100% convection) or any Lindab Climate products (amixture of radiation and convection).

In addition to calculating the effect requirement or the

resulting temperatures (air and operative), TEKNOsim

also calculates the PPD index. (Predicted Percentage

Dissatisfied with the given climate.)

Results are shown as diagrams and in text form. As

TEKNOsim works in Windows, results can easily be

transferred to other Windows applications, e.g. Word

or Excel.

Table 1: Table 1 shows how changing different parame-

ters affects the requisite cooling effect (excluding cooling

from the ventilation) for a given office.

Example: When th suns rays are reduced by 50%, the

cooling effect requirement falls by 40% for the light

room and by 42% for the heavy room compared with the

original rooms.

Table 2: Table 2 illustrates how changing different para-

meters affects the maximal indoor temperature with no

extra cooling effect.


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Since 1995, thousands of satisfied customers have

used TEKNOsim to simulate indoor climate, and thesoftware is also used for training purposes. We engaged

Chalmers University of Technology to test TEKNOsim

in a number of different simulations, and the results

showed good accordance with authentic situations.

(A simulation program known as BRIS, developed by

the Royal Institute of Technology in Stockholm, was

used for verification. In its turn, BRIS has been veri-fied against real-life cases in many building research

projects).

Comparison with BRIS made for three types of

rooms.

Room 1 is a normal office with normal internal loads in

two designs, light and heavy building structures.

Room 2 is as room 1 in the heavy design but with

two facades with large window areas and no internal

loads. In this situation the effects of strong sun loads

and simultaneous storage in heavy building structures

are studied.

Room 3 is as room 1 in the heavy design but without

windows. Instead the load in the room comes from

10 people during two periods in a day. In this situa-

tion the effects of strong and varying internal loads

are studied, which can correspond to conditions in a

conference room, assembly room or similar.

Three situations were considered for each room:

Without basic cooling: ventilation air taken from out-

doors, calculation of the resulting condition.

With basic cooling: ventilation air, 20 l/s, chilled to

19C, calculation of the resulting condition.

Dim. cooling effect: requisite cooling effect calculated

for a max room temperature of 25C.

If you would like more information on the tests conduc-

ted by Chalmers, or the software, please contact us.

Table 3.

Table 4.

Calculation parameter

Resulting room temp.

TEKNOsim

C

BRIS

C

Difference

(TS-BRIS)

Room 1, light

w/o basic cooling

35.6 35.6 0 C

Room 1, light

with basic cooling

31.6 31.3 +0.3 C

Room 1, heavy

w/o basic cooling

29.7 29.9 -0.2 C

Room 1, heavy

with basic cooling

27.1 27.2 -0.1 C

Room 2, light

w/o basic cooling

33.6 32.9 +0.7 C

Room 2, light

with basic cooling

31.2 30.5 +0.7 C

Room 2, heavy

w/o basic cooling

27.8 28.2 -0.4 C

Room 2, heavy

with basic cooling

25.8 26.2 -0.4 C

Calculation parameter

Resulting room temp.

TEKNOsim

(W)

BRIS

(W)

Difference

(TS-BRIS)

Room 1, light

dim. cooling effect

707 696 +1.6%

Room 1, heavy

dim. cooling effect

494 503 -1.8%

Room 2,

dim. cooling effect

828 851 -2.7%

Room 3,

dim. cooling effect

448 449 -0.2%


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1. Accurately simulates indoor climate, showing how

internal and external heat effects interact and how

these impact the indoor climate.

2. Simulates how selection of building materials

impacts the indoor temperature. Select building

materials from a comprehensive database of finished

structures.

3. Duration calculation of the room temperature (in

Sweden known as P25 and P27 methods). Calculate

how often the room temperature exceeds a given

value. Data can be used to calculate the most eco-

nomic scale of the indoor climate solution.

4. Calculates heat requirements for winter situations,according to DUT or according to Swedish Standard

SS024310.

5. Calculations can be made using a directed operative

temperature. As usual TEKNOsim is not bound to a

specific manufacturer, and you can select from ceil-

ing heating, floor heating, convectors and radiators.

6. Improved and larger product range with capability to

actively vary the quantity of air and range of pres-

sure for a product. This selection option can also be

used to identify the correct product size in relation to

given requirements.

7. Printouts of input and output data in both graphical

and text form.

8. Climatic data for 11 European countries with over

150 cities in total. The operator can enter climatic

data for other cities.

9. Support in 8 European languages.

10. Simple program updates for TEKNOsim via Internet.

Applications and new features in

TEKNOsim Europe

Swedish

Norweigan

Danish

Finnish

English

German

Polish

Italian


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