CSNI1002 PDHT-HP.

PDHT-HP, Post Dryout Heat Transfer Experiments, Upflow and Downflow Conditions

NAME OR DESIGNATION, COMPUTER, DESCRIPTION OF TEST FACILITY, DESCRIPTION OF TEST, EXPERIMENTAL LIMITATIONS OR SHORTCOMINGS, PHENOMENA TESTED, SPECIAL FEATURES OF EXPERIMENT, AUXILIARIES, STATUS, REFERENCES, TEST DESIGNATION, LANGUAGE, ESTABLISHMENT, MATERIAL, CATEGORIES

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1. NAME OR DESIGNATION: PDHT-HP.

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2. COMPUTERS

To submit a request, click below on the link of the version you wish to order. Rules for end-users are available here.

Program name	Package id	Status	Status date
PDHT-HP	CSNI1002/02	Arrived	01-AUG-2001

Machines used:

Package ID	Orig. computer	Test computer
CSNI1002/02	Many Computers

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3. DESCRIPTION OF TEST FACILITY

The Winfrith High Pressure Rig operated on a once-through system using positive displacement pumps to provide a flow of up to 0.9kg/s of demineralised water at pressures up to 34.0Mpa. The water was heated to the required temperature by a 750kW pre-heater. Both inlet and outlet pipework were fitted with drain valves and could be trace heated by an automatic temperature controlled system. A nitrogen supply was provided for purging the system. The vertically mounted test section consisted of a Nimonic 75 tube, 9.75mm ID and 14.0mm OD with a heated length of 920mm, which was directly heated by a manually controlled AC supply. Power was introduced by two 36mm thick nickel-plated copper blocks at either end of the heated length, which acted as the hot patches and were instrumented with thermocouples to enable the heat fluxed to be evaluated. The position of the dry-out front was maintained upstream of the test section by heat transfer from the hot patches. The test section itself had a total of 42 bare wire thermocouples, 0.3mm in diameter, positioned in pairs and attached to the outer surface.

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4. DESCRIPTION OF TEST

Steady state tests were performed to evaluate post-dryout heat transfer in upflow and downflow conditions. For the upflow tests, conditions were varied over the following ranges; pressure = 0.2 - 2.01Mpa, flow = 48 - 1010kg/m2s, inlet subcooling = 2.4 - 26.4 deg.C, equilibrium quality = 0 - 58% and heat flux = 14 - 360Kw/M2. For the downflow tests, conditions were varied over the following ranges; pressure = 0.2 - 0.51Mpa, flow = 48 - 504kg/m2s, inlet subcooling = 3.9 - 8.3 deg.C. equilibrium quality = 0 - 19% and heat flux = 6 - 150kW/m2.

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5. EXPERIMENTAL LIMITATIONS OR SHORTCOMINGS

Experimental conditions were limited by the ability of the hot patch to prevent the quench front entering the test section i.e. no data are available at high pressures, or very low qualities.

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6. PHENOMENA TESTED: Post-dryout heat transfer,

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7. SPECIAL FEATURES OF EXPERIMENT

Provides low and intermediate pressure, steady state post-dryout data for both upflow and downflow.

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8. RELATED OR AUXILIARY PROGRAMS

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9. STATUS

Package ID	Status date	Status
CSNI1002/02	01-AUG-2001	Arrived at NEADB

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10. REFERENCES

- D Swinnerton, KC Pearson and M L Hood:
Steady State Post-Dryout Experiments at Low Quality and Medium Pressure (AEEW-R2192, 1988)

CSNI1002/02, included references:

- D Swinnerton, M L Hood and KC Pearson:
Steady State Post-Dryout at Low Quality and Medium Pressure
AEEW-R2267, June 1988

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11. TEST DESIGNATION

The Winfrith High Pressure Rig - Post-Dryout Heat Transfer Experiments.
A total of 524 steady state tests were performed with both upflow and downflow, over a range of pressures, temperatures and flow rates.

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12. PROGRAMMING LANGUAGE(S) USED

No specified programming language

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15. ESTABLISHMENT

  AEA Technology,
  Winfrith Technology Centre,
  Dorchester DT2 8DH,
  United Kingdom

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16. MATERIAL AVAILABLE

CSNI1002/02

CCVM PDHT_HP for Tests 1 to 5, Journal and raw data

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17. CATEGORIES