Page 446 - Advanced Mine Ventilation

Appendix B: Ventilation Network

Analyzer in Fortran IV

Variable Names with Definitions

Input Variables
DELQDG flow of diesel exhaust per unit length of the roadwayegeneral
DELQDS flow of diesel exhaust per unit length of the roadwayespecial
E error considered acceptable for the quantity flow
FF friction factor for the branch
FX(I) fan pressure for data point no. I
HEIGHT(I) height of branch no. I
JJ junction number for the outside junction
KEY a control number to prevent repetitive calculations on identical fan curves
LENGTH(I) length of branch no. I
MAXIT maximum number of iterations
MAXJ maximum numerical designation for a junction
NB number of branches in the mine network
NBWNVP number of branches with natural ventilation pressure
NF number of fans in the mine
NFIXB number of fixed quantity flow branches
NJ number of junctions in the mine
NP number of data points for a fan curve
NQDBS number of branches with diesel exhaust generations
NQDJS number of junctions with diesel exhaust generations
NVP(I) natural ventilation pressure in branch no. I
QDBG quantity flow of diesel exhaust species in branches
QDBS quantity flow of diesel exhaust species in branches having diesel engines as a source
QDJG quantity flow of diesel exhaust species in junctions from sources other than diesel
engines
QDJS quantity flow of diesel exhaust species in junctions having diesel engines as a source
TLV threshold limit value of concentration of diesel exhaust
WIDTH(I) width of branch no. I
X(I) quantity flow for fan data point no. I

Other Symbols for Quantity Flow Analysis Section

BRANCH(I) locates branch numbers in decreasing order of resistance
J1(I) inlet junction number of branch no. 1
J2(I) exit junction number of branch no. 1
JC(I) labels each tree at junction no. 1