The program calculates the steady state of a remote heating network.
Network consists of a supplying and a return line.
Supplying line supplies the hot water to users, return line brings back the exausted water.
In detail the program
- pressures and temperatures,
- flow rates,
- heat losses,
- heat supplied.
The network is described by a
directed graph in which:
- arcs are the elements of the
- nodes are the points of
junction of two or more elements.
:Possible elements are:
(feeds to the net),
- heat exchangers,
- booster stations,
- pressure relief valves,
- interception valves,
- minor losses
(pipe enlargements, pipe constrictions, bends, tee joints, .... ).
Pipes pressure drops are
calculated according to Darcy Weisbach Colebrook's formula.
Water specific weight and viscosity are calculated according to temperature.
The more are the families supplied,
the less is probable that all flow rates have the maximum value at the
defined as the ratio between maximum
and real demand;
where maximum theoretical
demand is the product of family maximum demand by the number of supplied
coefficient changes along the network.
To design correctly a remote heating network
it is necessary to apply the contemporaneity coefficient to every pipe
flow rate, according to the number of families supplied by the pipe.
For more details see chapter 4.10 of book "Program Teleris release
3.2 - Steady state
calculation of a remote heating network) joined
to the program.
4.10 Download (uttlin.zip)
Program checks inputs values and
verifies the network behaviour.
is furnished in two editions: enterprise and light:
- maximum number of nodes
- maximum number of pipes
- maximum number of sources
- maximum number of relief
valves and booster
- maximum number of minor losses
- maximum number of interception
- maximum number of gas mixture
Light edition restriction:
the maximum number of nodes is 400.
book (108 pages), written with contribution of Enidata (ENI group):
- describes in detail all the
- explains how to use the
1. PHYSICAL QUNTITIES AND UNITS
1.2 Weight density
1.4 Flow rates
1.7 Specific heat
2. DEFINING THE NETWORK
2.2 Return line pressure control
of water coming out from a pipe
2.4 Pumps and pressure relief valves
2.5 Minor losses
Node compensation heat flows
Source compensation heat flows
3. WATER PHISIC CHARACTERISTICS
Water kinematic viscosity
Water specific weight
Water specific entalpy
THERMAL WAVES ACROSS THE GROUND
"Equivalent" ambient temperature
Typical working session
6. FORMS LIST
Parameters and formulas
LINKING TO A CARTOGRAPHIC SYSTEM
Executing program Teleris
Structure of input/output data
Relations between units