Data availability


Following experimental data are available by e-mailing to celata@casaccia.enea.it:

HEAT TRANSFER AND CRITICAL HEAT FLUX for R-12 flowing upwards in a vertical heated tube
TRANSIENT CRITICAL HEAT FLUX for R-12 flowing upwards in a vertical heated tube
TWO-PHASE CRITICAL FLOW of initially subcooled water in orifices e long channels
STEAM DIRECT CONTACT CONDENSATION on slowly moving water (rectangular and circular geometry), on water jets and water droplets (monodimensional distribution of droplet diameters)
HIGH HEAT FLUX CRITICAL HEAT FLUX with water at high velocity and subcooling
HEAT PUMPS: data from the experimental tests about 11 kW PCA

* * * * * * * C F 3 * * * * * * *

Heat transfer in pipes
critical heat flux in steady-state conditions
critical heat flux in transient conditions

Fluid: R-12
Wall: Stainless steel AISI 316, pipe Di=7.2 mm
12 wall thermocouples
6 fluid thermocouples
Q = 50 - 270 l/h (130,150,190)
Tfi= 17 - 90 C (27,37,50,65)
z = 2.3 and 1.18 m
P = from 9.5 to 30.5 bar
W = from 400 to 6000 W

Flow Rate

130 160 190
Pressure
12.5 2.0 2.5 3.0 3.5 4.0 2.5 3.0 3.5 4.0 4.5 3.0 3.5 4.0 4.5
15.5 2.0 2.5 3.0 3.5 2.5 3.0 3.5 4.0 4.5 3.0 3.5 4.0 4.5
20.2 2.0 2.5 3.0 2.5 3.0 3.5 4.0 3.0 3.5 4.0
27.7 2.5 3.0 2.5 3.0 3.5 3.5

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CF3-STAZ.TXT

Tab-separated.

Steady-state data along the pipe, 1448 tests

Pin 6.2 to 31 [bar]
Pout 6.2 to 30.5 [bar] (12.5, 15.5, 20.2, 27.7)
W 375 to 7000 [W]
Z 1.18 and 2.3 [m]
Q 50 to 272 [l/h] (130, 160, 190)
Tmul 20 to 35 [C]
Tw1-Tw12 25 to 160 [C]
Tf1-Tf8 16 to 94 [C]

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CHF.TXT

Space-separated.

Critical heat flux, diameter=7.72 mm, Freon 114

114 tests

pi [MPa] 1.23 - 2.96
po [MPa] 0.616 - 2.93
G [kg/m2s] 385 - 1558
Ti [C] 26.6 - 89.5
DTsub [C] 0.78 - 25.77 (82 tests at 23 C)
q" [kW/m2] 0.028 - 92.59
L [m] 1.18 and 2.3

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Transient tests tables

They contain the coefficients of the empirical correlations to reconstruct the variations of the thermal-hydraulic parameters (imposed from the outside) during the transient.

Errors are in the file ERR.LAS. It is necessary the report 'Dataset ...'.

q" = 30 - 120 kW/m2, 410 runs, 294 runs.

tp = 0.4 - 5

 

ERR.LAS

Uncertainly of the functions used to represent the transients

TQ.TXT

Flow transient. 411 runs

p [MPa] 1.2 - 3.0
G [kg/m2s] 1000 - 1490
DTsub [K] 23
q" [kW/m2] 32 - 115
L [m] 1.18 and 2.3
th [s] 0.4 - 15
t-chf [s] 0.3 - 14.5

th = half-decay time

TP.TXT

Pressure transient, 297 runs

p [MPa] 1.2 - 2.75
G [kg/m2s] 1000 - 1500
DTsub [K] 23
q" [kW/m2] 28 - 110
L [m] 1.18 and 2.3
dp/dt [MPa/s] 0.05 - 0.9
t-chf [s] 0.3 - 6.9
t-rew [s] < 24

   

TWG.TXT

Step-wise power transient

Wchf-Wi [kW] 0.5; 1.0; 1.7
Wf-Wchf [kW] 0.2; 0.5; 1.0; 2.0
Wi [kW] 1.2 - 4.5
p [MPa] 1.2 - 2.75
G [kg/m2s] 700 - 1500
DTsub [K] 10 - 41
q" [kW/m2] 28 - 110
L [m] 1.18 and 2.3
t-chf [s] 0.5 - 4.3

TWR.TXT

Ramp-wise power transient

dW/dt [kW/s] 0.5 - 6.0
Wi [kW] 1.6 - 3.7
p [MPa] 1.2 - 2.75
G [kg/m2s] 750 - 1550
DTsub [K] 10 - 41 K
q" [kW/m2] 28 - 110
L [m] 1.18 and 2.3
t-chf [s] 1 - 5.5

  

QP.TXT

Flow rate + Pressure transient

WP.TXT

Step-wise power + Pressure transient

WP1.TXT

Ramp-wise power + Pressure transient

WQ.TXT

Step-wise power + Flow rate transient

WQ1.TXT

Ramp-wise power + Flow rate transient

WQP.TXT

Step-wise power + Flow rate + Pressure transient

WQP1.TXT

Ramp-wise power + Flow rate + Pressure transient

Transient tables, where the imposed variation is obtained from the coefficients of empirical functions given in "Dataset ..."

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* * * * * * * J F * * * * * * *

Two-phase critical flows (water)
Two-phase critical flows (water + air)

TABELLA.TXT

Subcooled two-phase critical flow.

137 runs

L [m] 0.016 - 1.5 length
D [mm] 1.63 - 12.7 diameter
L/D 10 - 326
Po [MPa] 0.86 - 3.4 inlet pressure
To [C] 107 - 240 inlet temperature
Tsub [C] 0.02 - 113 inlet subcooling
Gexp [kg/m2-s] 8960 - 48200 experimental mass flowrate
Pc [MPa] 1.28 - 19 outlet pressure

INCOND.TXT

Test table of critical flow with non-condensable

Test section: diameter = 4.61 mm, length = 325 diameters (1.5 m)

Po [MPa] inlet pressure
To [C] inlet temperature
Tsub [C] inlet subcooling
Pc [MPa] outlet pressure
Gco [kg/m2-s] two-phase mass flux without air injection
Gc [kg/m2-s] two-phase mass flux with air injection
Ga [kg/m2-s] air mass flux
P1 [MPa] pressure at 2 mm from inlet
P2 [MPa] pressure at 325 mm from inlet
P3 [MPa] pressure at 1125 mm from inlet
P4 [MPa] pressure at 1425 mm from inlet
P5 [MPa] pressure at 1495 mm from inlet

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* * * * * * * E C O * * * * * * *

Direct contact condensation on:

drops
jets
quasi-stagnant water (circular geometry)
quasi-stagnant water (rectangular geometry)

TABGOCCE.TXT

Condensation on droplets data table. 164 runs, 1277 measurements

For each test we have, at different distance from the nozzle:

z distance from the nozzle
Td droplet temperature
TETA (Td-Two)/(Ts-Two)
h heat transfer coefficient
TAU non-dimensional time 4at/Do**2
D droplet diameter
ud droplet velocity
e experimental uncertainty of TETA
f frequency of the vibrator
d nozzle diameter
Ts steam temperature
Tw,nom water temperature

F_OPT.DAT

Most suitable frequency for the formation of droplets of a prefixed diameter tab-separated, 48 data

Q [l/min] 0.1 - 1 volumetric flow rate
fopt [Hz] 600 - 13000 best frequency
d [mm] 0.17 - 0.8 hole diameter

 


GETTO.DAT

data related to jets

DATA FORMAT :

run number

h/d d[mm]

tvap [c], tin [c], flow rate [l/min], run number

1st location, temperature 1

2nd location, temperature 2

...

...

Nth location, temperature N

 

BREAKUP.DAT

Jet "break-up" in air data,

FLOW RATE 0 - 3.0

H/D 1 - 20

DIAMETER 1 - 5

L-BREAK [mm] 0 - 416

and than original data from the pictures


DATIECO.DAT

Direct contact condensation: data related to the circular geometry

119 data of saturated steam water interaction

12 data of saturated steam water interaction for low water flow rates

run number,Tin,Tout,Tv,Tbulk,flow rate [l/min]

Tv [C] 105 - 155

p [bar] 1.21 - 5.43

16 data related to the influence of the water level (saturated steam-water interaction)

run number,Tin,Tout,Tv,Tbulk,Port.[l/min],level[mm]

151 data related to super-heated steam-water interaction

5 data related to general conditions during the tests, for the measurement of the steam temperature gradient (super-heated steam-water interaction)

run number,Tin,Tout,Tv(sat.),Tbulk,Port.[l/min],Pressure[bar.],Tvap


PRET.TXT e PRET.TAB (Tab-separated)

Direct contact condensation. Rectangular geometry tests

224 runs

L[mm] 4 - 10 water level
Q[l/min] 0.05 - 1.6 volumetric flow rate
G[kg/m2s] 4.2 - 296 mass flux
Tv[C] 117 - 153 steam temperature
Ti[C] 19.7 - 72 inlet liquid temperature
Tu[C] 25 - 87 outlet liquid temperature
TETA[-] 0.007 - 0.3 condensation efficiency (Tu - Ti)/(Tsat - Ti)
z[mm] 2 - 9 distance from the bottom of the channel at which T2, T3, T4, T5 are measured
T2, T3, T4,T5[C] 21 - 123 liquid temperatures along the channel (in 124 tests) and, for 18 runs with superheated steam
pv[MPa] 0.21 - 0.22 steam pressure
Tv[C] 160 - 190 steam temperature

     

TLOCALE.DAT

graphs fig.8 from "A Theoretical and exper. study of turb..."

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* * * * * * * S T A F * * * * * * *

STAF.DAT

Subcooled flow boiling critical heat flux:

Stationary test, fluid Water
Wall stainless steel AISI 316 pipe
Outlet pressure(MPa) 0.1 - 5.1
Mass flux(kg/m2s) 2000 - 50000
Inlet temperature(C) 20 - 75
Critical heat flux(MW/m2) 4 - 67
Internal diameter(mm) 0.25 - 8
Heated length(m) 0.01 - 0.15

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