Description Usage Arguments Details Value See Also Examples
Calculate temperature drop in steel pipe of district heating system (where water is a heat carrier) that is a result of heat losses through pipe wall and insulation.
1 |
temperature |
temperature of heat carrier (water) inside the pipe measured at the
inlet of pipe, [°C]. Type: |
pressure |
absolute pressure
of heat carrier (water) inside the pipe, [MPa]. Type: |
consumption |
amount of heat carrier (water) that is transferred by pipe during a period,
[ton/hour]. Type: |
flux |
heat flux emitted by pipe during a period, [kcal/hour].
Type: |
Specific isobaric heat capacity used in calculations is calculated according to IAPWS R7-97(2012) for Region 1 since it is assumed that state of water in district heating system is always in that region.
temperature drop at the outlet of pipe, [°C]. Type: assert_double
.
m325dropt
for calculating normative values of temperature drop
Other district heating:
dropg()
,
dropp()
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 | # Calculate normative temperature drop based on Minenergo-325 for pipe segment
pipeline <- list(
year = 1968,
laying = "channel",
d = 700,
l = 1000
)
operation_temperature <- c(130, 150) # [°C]
foo <- dropt(
temperature = operation_temperature,
flux = do.call(
m325nhl,
c(pipeline, temperature = list(operation_temperature))
)
)
foo
# [1] 1.366806 1.433840
# This is the same as using m325dropt:
bar <- m325dropt(temperature = operation_temperature,
year = 1968, laying = "channel", d = 700, len = 1000
)
bar
# [1] 1.366806 1.433840
|
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