Active cooling for downhole instrumentation: Preliminary analysis and system selection

Technical Report · Tue Mar 01 04:00:00 EST 1988

DOI:https://doi.org/10.2172/5360643· OSTI ID:5360643

Bennett, G A

A feasibility study and a series of preliminary designs and analyses were done to identify candidate processes or cycles for use in active cooling systems for downhole electronic instruments. A matrix of energy types and their possible combinations was developed and the energy conversion process for each pari was identified. The feasibility study revealed conventional as well as unconventional processes and possible refrigerants and identified parameters needing further clarifications. A conceptual design or series od oesigns for each system was formulated and a preliminary analysis of each design was completed. The resulting coefficient of performance for each system was compared with the Carnot COP and all systems were ranked by decreasing COP. The system showing the best combination of COP, exchangeability to other operating conditions, failure mode, and system serviceability is chosen for use as a downhole refrigerator. 85 refs., 48 figs., 33 tabs.

• Research Organization: Los Alamos National Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5360643
• Report Number(s): LA-11102-MS; ON: DE88007080
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
150901* -- Geothermal Engineering-- Drilling Technology & Well Hardware
42 ENGINEERING
420206 -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
ABSORPTION REFRIGERATION CYCLE
COOLING
COOLING SYSTEMS
DESIGN
DIRECT ENERGY CONVERTERS
ELECTROCHEMICAL CELLS
ELECTRONIC EQUIPMENT
ENERGY SYSTEMS
ENERGY TRANSFER
EQUIPMENT
FEASIBILITY STUDIES
FUEL CELLS
GEOTHERMAL WELLS
Geothermal Legacy
HEAT TRANSFER
PERFORMANCE
REFRIGERATION
VAPOR COMPRESSION REFRIGERATION CYCLE
WELLS