Show simple item record

dc.contributor.authorSkye, H. M.en_US
dc.contributor.authorKlein, S. A.en_US
dc.contributor.authorNellis, G. F.en_US
dc.date.accessioned2011-07-15T15:14:54Z
dc.date.available2011-07-15T15:14:54Z
dc.date.issued2008-05
dc.identifier.isbn978-1-934021-02-6
dc.identifier.urihttp://hdl.handle.net/1853/39791
dc.descriptionPresented at the 16th International Cryocooler Conference, held May 17-20, 2008 in Atlanta, Georgia.en_US
dc.description.abstractCryosurgery is a technique for destroying undesirable tissue such as cancers using a freezing process. A previous paper referenced here describes the development of a thermodynamic modeling tool for a precooled Mixed Gas Joule-Thomson (MGJT) cryoprobe used for cryosurgery. An experimental test facility has been constructed to capture the performance of a precooled MGJT cryoprobe; the experimental data will be used to tune and verify the model. The test facility is flexible relative to working fluid, charge pressure, pressure ratio, and flow rate. Therefore, the facility can also be used to demonstrate additional cooling capacity available with the optimal mixture compositions and operating parameters selected by the model. A commercially available cryoprobe system has been disassembled and installed in a vacuum insulated dewar. The system has been modified in order to integrate a suite of measurement instrumentation that can completely characterize the performance of individual components as well as the overall system. Measurements include sufficient temperature and pressure sensors to resolve thermodynamic states and flow meters to calculate heat and work transfer rates. A thermal load is applied to the cycle using an electric heater to characterize the refrigeration performance. Temperature sensors are also integrated within the recuperator in order to capture the heat transfer performance of the two-phase, multi-component mixture as it flows through the recuperator. An uncertainty analysis for the experiment is presented in this paper and shows that the performance metrics can be computed from the experimental data to within 10% uncertainty under the nominal anticipated operating conditions using both a synthetic refrigerant and hydrocarbon based gas mixture. Preliminary data are reduced to demonstrate the capability of the test facility.en_US
dc.language.isoen_USen_US
dc.publisherGeorgia Institute of Technologyen_US
dc.relation.ispartofseriesCryocoolers 16. Commercial cryocooler applicationsen_US
dc.subjectCommercial cryocooler applicationsen_US
dc.subjectCryosurgical probesen_US
dc.subjectMixed Gas Joule-Thomson cryoprobeen_US
dc.subjectMGJTen_US
dc.titleExperimental Apparatus for Measuring the Performance of a Precooled Mixed Gas Joule Thomson Cryosurgical Probeen_US
dc.typeProceedingsen_US
dc.contributor.corporatenameUniversity of Wisconsin--Madisonen_US
dc.publisher.originalICC Pressen_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record