Control Dewar Subcooler Heat Exchanger Calculations [electronic resource]
Experiment-Hep.
Saved in:
| Online Access: |
Online Access (via OSTI) |
|---|---|
| Corporate Author: | |
| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Washington, D.C. : Oak Ridge, Tenn. :
United States. Department of Energy. Office of Science ; distributed by the Office of Scientific and Technical Information, U.S. Department of Energy,
1993.
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| Subjects: |
MARC
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| 040 | |a TOE |c TOE | ||
| 049 | |a GDWR | ||
| 072 | 7 | |a 32 |2 edbsc | |
| 072 | 7 | |a 72 |2 edbsc | |
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| 245 | 0 | 0 | |a Control Dewar Subcooler Heat Exchanger Calculations |h [electronic resource] |
| 260 | |a Washington, D.C. : |b United States. Department of Energy. Office of Science ; |a Oak Ridge, Tenn. : |b distributed by the Office of Scientific and Technical Information, U.S. Department of Energy, |c 1993. | ||
| 300 | |a 12 pages : |b digital, PDF file. | ||
| 336 | |a text |b txt |2 rdacontent. | ||
| 337 | |a computer |b c |2 rdamedia. | ||
| 338 | |a online resource |b cr |2 rdacarrier. | ||
| 500 | |a Published through SciTech Connect. | ||
| 500 | |a 10/04/1993. | ||
| 500 | |a "fermilab-d0-en-351" | ||
| 500 | |a Rucinski, R.; /Fermilab; /Fermilab. | ||
| 520 | 3 | |a The calculations done to size the control dewar subcooler were done to obtain a sufficient subcooler size based on some conservative assumptions. The final subcooler design proposed in the design report will work even better because (1) It has more tubing length, and (2) will have already subcooled liquid at the inlet due to the transfer line design. The subcooler design described in the 'Design Report of the 2 Tesla Superconducting Solenoid for the Fermilab D0 Detector Upgrade' is the final design proposed. A short description of this design follows. The subcooler is constructed of 0.50-inch OD copper tubing with 1.0-inch diameter fins. It has ten and one half spirals at a 11.375-inch centerline diameter to provide 31 feet of tubing length. The liquid helium supply for the solenoid flows through the subcooler and then is expanded through a J-T valve. The subcooler spirals are immersed in the return two phase helium process stream. The return stream is directed over the finned tubing by an annulus created by a 10-inch pipe inside a 12-inch pipe. The transfer line from the refrigerator to the control dewar is constructed such that the liquid helium supply tube is in the refrigerator return stream, thereby subcooling the liquid up to the point where the u-tubes connect the transfer line to the control dewar. The subcooler within the control dewar will remove the heat picked up in the helium supply u-tube/bayonets. The attached subcooler/heat exchanger calculations were done neglecting any subcooling in the transfer line. All heat picked up in the transfer line from the refrigerator storage dewar to the control dewar is absorbed by the supply stream. The subcooler was sized such that the two phase supply fluid is subcooled at 1.7 atm pressure and when expanded through a JT valve to 1.45 atm pressure it is at a saturated liquid state. The calculations apply during steady state operation and at a flow rate of 16 g/s. The analysis of the heat exchanger was broken into two parts relating to the heat transfer mode taking place. The first part is considered the condensing part in which the helium supply stream is changed from two phase fluid to one phase liquid. The second part is the subcooling part where the liquid temperature is lowered, i.e.. subcooled. A summary of the calculations and results appears on the next page. The raw calculations follow the summary. | |
| 520 | 0 | |a Experiment-Hep. | |
| 536 | |b AC02-07CH11359. | ||
| 650 | 7 | |a Copper. |2 local. | |
| 650 | 7 | |a Design. |2 local. | |
| 650 | 7 | |a Dewars. |2 local. | |
| 650 | 7 | |a Fermilab. |2 local. | |
| 650 | 7 | |a Flow Rate. |2 local. | |
| 650 | 7 | |a Heat Exchangers. |2 local. | |
| 650 | 7 | |a Heat Transfer. |2 local. | |
| 650 | 7 | |a Helium. |2 local. | |
| 650 | 7 | |a Refrigerators. |2 local. | |
| 650 | 7 | |a Safety Reports. |2 local. | |
| 650 | 7 | |a Solenoids. |2 local. | |
| 650 | 7 | |a Storage. |2 local. | |
| 650 | 7 | |a Subcooling. |2 local. | |
| 650 | 7 | |a Superconducting Magnets. |2 local. | |
| 650 | 7 | |a Valves. |2 local. | |
| 650 | 7 | |a Energy Conservation, Consumption, And Utilization. |2 edbsc. | |
| 650 | 7 | |a Physics Of Elementary Particles And Fields. |2 edbsc. | |
| 710 | 2 | |a Fermi National Accelerator Laboratory. |4 res. | |
| 710 | 1 | |a United States. |b Department of Energy. |b Office of Science. |4 spn. | |
| 710 | 1 | |a United States. |b Department of Energy. |b Office of Scientific and Technical Information. |4 dst. | |
| 856 | 4 | 0 | |u http://www.osti.gov/scitech/biblio/1031783 |z Online Access (via OSTI) |
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