UNI EN 13384-2 : 2009

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols, terminology, units
5 Calculation method
   5.1 General principles
   5.2 Pressure equilibrium condition
       5.2.1 Negative pressure chimneys
       5.2.2 Positive pressure chimneys
   5.3 Mass flow requirement
   5.4 Pressure requirements
       5.4.1 Negative pressure chimneys
       5.4.2 Positive pressure chimneys
   5.5 Temperature requirement
   5.6 Calculation procedure
6 Flue gas data characterising the heating appliance
7 Data for chimney and connecting flue pipes
8 Basic data for the calculation
   8.1 Air temperatures
       8.1.1 External air temperature (T[L])
       8.1.2 Ambient air temperature (T[u])
   8.2 External air pressure (p[L])
   8.3 Gas constant
       8.3.1 Gas constant of the air (R[L])
       8.3.2 Gas constant of flue gas (R)
   8.4 Density of air (rho[L])
   8.5 Specific heat capacity of the flue gas (c[p])
   8.6 Water vapour content (sigma(H[2]O)[j]) and condensing
       temperature (T[sp])
   8.7 Correction factor for temperature instability (S[H])
   8.8 Flow safety coefficient (S[E])
   8.9 External coefficient of heat transfer
9 Determination of temperatures
10 Mixing calculations
   10.1 Flue gas mass flow (m[j])
   10.2 Flue gas temperature at the inlet of the chimney
        segment (T[ej])
   10.3 CO[2]-content of the flue gas in the chimney segment
        (sigma(CO[2])[j])
   10.4 H[2]O-content of the flue gas (sigma(H[2]O)[j])
   10.5 Gas constant of the flue gas (R[j])
   10.6 Flue gas data
        10.6.1 Specific heat capacity (c[pVj]), (c[pj])
        10.6.2 Thermal conductivity of the flue gas
               (lambda[Avj]), (lambda[Aj])
        10.6.3 Dynamic viscosity (eta[Avj]), (eta[Aj])
11 Density and velocity of the flue gas
12 Determination of the pressures
   12.1 Pressures at each inlet of the chimney segments
        12.1.1 Draught
        12.1.2 Positive pressure
        12.1.3 Draught due to chimney effect in the chimney
               segment (P[Hj])
        12.1.4 Pressure resistance in the chimney segment
               (P[Rj])
   12.2 Minimum draught required at the flue gas inlet into
        the chimney and maximum allowed draught (P[Ze] and
        P[Zemax]) and maximum and minimum differential
        pressure at the flue gas inlet into the chimney
        (P[ZOe] and P[ZOemin])
        12.2.1 Minimum required and maximum allowed draught
        12.2.2 Maximum available and minimum allowed
               differential pressure
        12.2.3 Calculated pressure resistance of the
               connecting flue pipe (P[Vj])
        12.2.4 Calculated pressure resistance of the air
               supply (P[Bcj])
13 Inner wall temperature
14 Cascade installations
   14.1 Principle of the calculation method
   14.2 Pressure equilibrium condition
        14.2.1 Negative pressure cascade installation
        14.2.2 Positive pressure cascade installation
   14.3 Mass flow requirement
   14.4 Pressure requirements
        14.4.1 Negative pressure chimneys
        14.4.2 Positive pressure chimneys
   14.5 Temperature requirement
   14.6 Calculation procedure
   14.7 Pressures at the outlet of the connecting flue pipe
        and pressures at the inlet of the collector segment
        14.7.1 Pressure at the flue gas inlet into the
               collector segment (P[ZCjl] or P[ZOCjl])
        14.7.2 Pressures required or available at the outlet
               of the connecting flue pipe (P[ZeCjl],
               P[ZeOCjl])
   14.8 Inner wall temperature (T[iobCjl])
15 Balanced flue chimney
   15.1 Principle of the calculation method
   15.2 Pressure equilibrium condition
   15.3 Mass flow requirement
   15.4 Pressure requirements
         15.4.1 Negative pressure chimneys
         15.4.2 Positive pressure chimneys
   15.5 Temperature requirements
   15.6 Calculation procedure for balanced flue chimneys
   15.7 Mass flow of the supply air
   15.8 Determination of the temperatures in balanced
         flue chimneys
         15.8.1 Separate ducts
         15.8.2 Concentric ducts
         15.8.3 Concentric connection pipes
   15.9 Pressures of the air supply ducts
         15.9.1 Draught due to chimney effect of the air
                supply duct of chimney segment j
         15.9.2 Draught due to chimney effect of the air
                supply duct of connection pipes
         15.9.3 Pressure resistance of the air supply duct
                of the chimney segment j (P[RBj])
   15.10 Density and velocity of the supply air
         15.10.1 Density and velocity of the supply air in
                 the air supply duct averaged over the length
                 of the chimney segment
         15.10.2 Density and velocity of the supply air
                 averaged over the length of the connection
                 pipes
Annex A (informative) Recommendations
      A.1 Recommendations for the chimney and heating
          appliances:
      A.2 Recommendations for connecting flue pipes:
Annex B (informative) Characteristics for the heating
        appliance