Documentatie de proiectare ZBN
Documentatie de proiectare ZBN
Documentatie de proiectare ZBN
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Exemple<br />
<strong>de</strong> <strong>proiectare</strong><br />
Principii <strong>de</strong> baza<br />
pentru proiect<br />
Necesarul <strong>de</strong> caldura termica al<br />
incaperii se calculeaza conform<br />
normelor in vigoare. Daca pier<strong>de</strong>rea<br />
<strong>de</strong> caldura prin acoperis<br />
este mai mare <strong>de</strong> 30% din<br />
sarcina termica totala, aceasta<br />
insemnand o crestere a pier<strong>de</strong>rilor<br />
<strong>de</strong> caldura in zona<br />
acoperisului. Daca schimbul <strong>de</strong><br />
aer din incapere <strong>de</strong>paseste valoarea<br />
normala <strong>de</strong> ventilare prin<br />
rosturi (max. 1/h), mai ales in<br />
cazul instalatiilor cu hote sau<br />
exhaustoare aerul proaspat care<br />
intra trebuie sa fie pre-incalzit.<br />
Doar incalzirea prin radiatie nu<br />
impiedica intrarea aerului<br />
rece pe la usi sau in zonele <strong>de</strong><br />
incarcare auto. Aceasta<br />
situatie trebuie remediata<br />
prin intermediul unor jaluzele<br />
cu lamele, per<strong>de</strong>le <strong>de</strong> aer cald<br />
sau alte dispozitive similare.<br />
Exemplu <strong>de</strong> <strong>proiectare</strong> si<br />
amplasare<br />
Exemplul urmator arata cum trebuie<br />
efectuata <strong>proiectare</strong>a pentru o hala.<br />
Obiectiv<br />
Temperatura ambientala uniforma<br />
(20° C) pe toata suprafata incaperii.<br />
Conditii prealabile<br />
Hala izolata: Lungime 100 m,<br />
latime 30 m, inaltime 8 m.<br />
Schimbul <strong>de</strong> aer: 0,3 1/h<br />
Temperatura exterioara: -12° C<br />
Necesarul <strong>de</strong> caldura<br />
Pier<strong>de</strong>re <strong>de</strong> caldura prin conductie conform normelor:<br />
Pier<strong>de</strong>re <strong>de</strong> caldura prin ventilare conform normelor:<br />
Pier<strong>de</strong>re <strong>de</strong> caldura totala:<br />
Dimensionarea la panourile<br />
radiante<br />
Temperatura tur: 80° C<br />
Temperatura retur: 70° C<br />
Tip Lungime Δt<br />
Putere specifica<br />
Numar<br />
Putere totala<br />
m<br />
K<br />
W/m W/colectori (pereche)<br />
W<br />
<strong>ZBN</strong> 900/6<br />
12.5<br />
55<br />
507<br />
271<br />
4<br />
108500 W<br />
77260 W<br />
185760 W<br />
26434<br />
<strong>ZBN</strong> 900/6<br />
45<br />
55<br />
507<br />
271<br />
4<br />
92344<br />
<strong>ZBN</strong> 450/3<br />
45<br />
55<br />
270<br />
131<br />
4<br />
49124<br />
<strong>ZBN</strong> 300/2<br />
45<br />
55<br />
199<br />
88.7<br />
2<br />
18087<br />
185989<br />
Amplasare<br />
■ Type 5 randuri <strong>de</strong> Installation panouri Temperature radiante<br />
length m difference K W/m<br />
amplasate pe lung, intrerupte in<br />
<strong>ZBN</strong> 900/6<br />
12,5<br />
55<br />
507<br />
centrul incaperii, distanta interax in<br />
<strong>ZBN</strong> altul 1050/7<strong>de</strong> 7.2 m, 45 randurile 55 exterioare 590<br />
<strong>ZBN</strong><br />
mai<br />
600/4late <strong>de</strong>cat<br />
45<br />
cele din<br />
55interior;<br />
■ la fiecare capat 1 rand impartit<br />
la mijloc; distanta fata<strong>de</strong> peretii<br />
exteriori 1.5 m.<br />
342<br />
Heat output<br />
W/Hea<strong>de</strong>r pair<br />
271<br />
320<br />
174<br />
Number<br />
4<br />
4<br />
4<br />
Total heat output<br />
W<br />
26434<br />
107480<br />
62256<br />
196170<br />
Halle A, 8 m hoch<br />
Norm-Transmissionswärmeverluste <strong>de</strong>r Halle:<br />
Norm-Lüftungswärmeverluste <strong>de</strong>r Halle:<br />
Norm-Heizlast<br />
108500 W<br />
77260 W<br />
185760 W<br />
52
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