Страница 6: ДСТУ Б EN 13384-2:2010. Інженерне обладнання будинків і споруд. Димоходи. Методи теплотехнічного та аеродинамічного розрахунків. Частина 2. Димоходи з підключенням декількох теплогенераторів (67305)

If the pressure equilibrium condition is not fulfilled a new estimate of m_w based on the observed difference between P_zj and P_Zej or P_zoj and Pzoej ^{and a new} iteration shall be made.

6 FLUE GAS DATA CHARACTERISING THE HEATING APPLIANCE

For the calculation of the temperature and pres­sure values the relevant flue gas data characteris­ing the heating appliance shall be specified. This includes:

• minimum, declared draught or maximum declared differential pressure of the heating appliance (Ffo/.y or%_O y);

• declared flue gas temperature of the heating appliance (t_w у). ,

Both values shall be given in relation to the flue gas mass flow at various working conditions of the heating appliances (in operation, out of action). The calculated draught P_Wcj or differential pres­sure %oc,y°f ^the heating appliance shall be given for both working conditions in form of a 4th degree poly-nominal (formula 10)

/ • f • 2 r . 3 / • 4

^,=ь_о+4^PM +UMRv w

P ^mWj J I, ^mWj J ^mWj J P ^mWj )

_D^mWcj ^mWcj ^mWcj] .

'°WOc j ^{= с}0^+сГ —: + C₂' —: + C₃- —'■ + c₄ • —_; Па, (10a)

’ P ^mWj ) P ^mWj ) P ^mWj ) P ^mWj )

( m '/²