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in subjects: "Stirling"

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Malone refrigeration

Malone refrigeration is the use of a liquid near its critical points without evaporations as working fluid in a regenerative or recuperative refrigeration cycle such as the Stirling and Brayton cycles. It`s potential advantages include compactness, efficiency, an environmentally benign working fluid, and reasonable cost. One Malone refrigerator has been built and studied; two more are under construction. Malone refrigeration is such a new, relatively unexplored technology that the potential for… more

Date: June 1, 1993

Creator: Swift, G. W.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

RTGs Options for Pluto Fast Flyby Mission

A small spacecraft design for the Pluto Fast Flyby (PFF) Mission is under study by the Jet Propulsion Laboratory (JPL) for the National Aeronautics and Space Administration (NASA), for a possible launch as early as 1998. JPL's 1992 baseline design calls for a power source able to furnish an energy output of 3963 kWh and a power output of 69 watts(e) at the end of the 9.2-year mission. Satisfying those demands is made difficult because NASA management has set a goal of reducing the spacecraft ma… more

Date: October 1, 1993

Creator: Schock, Alfred

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Radioisotope Stirling Generator Options for Pluto Fast Flyby Mission

The preceding paper described conceptual designs and analytical results for five Radioisotope Thermoelectric Generator (RTG) options for the Pluto Fast Flyby (PFF) mission, and the present paper describes three Radioisotope Stirling Generator (RSG) options for the same mission. The RSG options are based on essentially the same radioisotope heat source modules used in previously flown RTGs and on designs and analyses of a 75-watt free-piston Stirling engine produced by Mechanical Technology Inco… more

Date: October 1, 1993

Creator: Schock, Alfred

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Integration of Radioisotope Heat Source with Stirling Engine and Cooler for Venus Internal-Structure Mission

The primary mission goal is to perform long-term seismic measurements on Venus, to study its largely unknown internal structure. The principal problem is that most payload components cannot long survive Venus's harsh environment, 90 bars at 500 degrees C. To meet the mission life goal, such components must be protected by a refrigerated payload bay. JPL Investigators have proposed a mission concept employing a lander with a spherical payload bay cooled to 25 degrees C by a Stirling cooler power… more

Date: October 1, 1993

Creator: Schock, Alfred

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Innovative Phase Change Thermal Energy Storage Solution for Baseload Power Phase 1 Final Report

The primary purpose of this project is to develop and validate an innovative, scalable phase change salt thermal energy storage (TES) system that can interface with Infinia’s family of free-piston Stirling engines (FPSE). This TES technology is also appropriate for Rankine and Brayton power converters. Solar TES systems based on latent heat of fusion rather than molten salt temperature differences, have many advantages that include up to an order of magnitude higher energy storage density, much… more

Date: May 15, 2013

Creator: Qiu, Songgang

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Radioisotope Stirling Generator Options for Pluto Fast Flyby Mission

Date: unknown

Creator: Schock, Alfred

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Free displacer and Ringbom displacer for a Malone refrigerator

Malone refrigeration uses a liquid near its critical point (instead of the customary gas) as the working fluid in a Stirling, Brayton, or similar regenerative or recuperative cycle. Thus far, we have focused on the Stirling cycle, to avoid the difficult construction of the high-pressure-difference counterflow recuperator required for a Brayton machine. Our first Malone refrigerator used liquid propylene (C{sub 3}H{sub 6}) in a double-acting 4-cylinder Stirling configuration. First measurements … more

Date: May 1, 1994

Creator: Swift, G. W. & Brown, A. O.

Item Type: Article

Partner: UNT Libraries Government Documents Department

Aircraft insignia.

Twenty different types of airplanes fly across the scene, each with distinct markings. The main background is of clouds in the sky. The border is comprised of insignia of aircraft from 47 countries.

Date: 1943

Creator: Coggins, Jack

Item Type: Poster

Partner: UNT Libraries Government Documents Department