Cooling system for thermal analysis

A cooling system for thermal analysis equipment provides rapid cool down and steady state operation of a differential scanning calorimeter (DSC) at any predetermined temperature between a minimal temperature and room temperature using a throttle-cycle cooler based on a single stage compressor. The c...

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Bibliographic Details
Main Author BOIARSKI MIKHAIL
Format Patent
LanguageEnglish
Published 14.02.2002
Edition7
Subjects
BLASTING
COMBINED HEATING AND REFRIGERATION SYSTEMS
HEAT PUMP SYSTEMS
HEATING
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
LIGHTING
LIQUEFACTION SOLIDIFICATION OF GASES
MANUFACTURE OR STORAGE OF ICE
MEASURING
MEASURING QUANTITY OF HEAT
MEASURING TEMPERATURE
MECHANICAL ENGINEERING
PHYSICS
REFRIGERATION MACHINES, PLANTS OR SYSTEMS
REFRIGERATION OR COOLING
TESTING
THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
WEAPONS
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Summary:A cooling system for thermal analysis equipment provides rapid cool down and steady state operation of a differential scanning calorimeter (DSC) at any predetermined temperature between a minimal temperature and room temperature using a throttle-cycle cooler based on a single stage compressor. The cooling system operates with a mixed refrigerant that includes some liquid fraction at the inlet to a cryostat that houses the key cold elements for the cooling system. A temperature actuated automatic throttle valve in the cooling system increases refrigerant mass flow rate when the differential scanning calorimeter increases the heat load (and vice-versa) that is generally provided by a heater. At the same time, the valve design provides a high mass flow during cool down and automatic flow rate reduction at an intermediate temperature as the overall system approaches an operating condition during cool down.
Bibliography:Application Number: US20010904171