Thermo-Acoustic Convertor for Space Power, Phase I

Metadata Updated: February 28, 2019

Sunpower will introduce thermoacoustic Stirling heat engine (TASHE) technology into its existing Stirling convertor technology to eliminate the moving mechanical displacer. The displacer function will be performed by a thermal buffer tube and supporting thermoacoustic components containing no moving mechanical parts. Sunpower's linear alternator will be retained, except re-sized to accommodate the power of the TASHE. TASHE technology has evolved independently, spearheaded by efforts at Los Alamos National Laboratory and typically packages components (heat exchangers, thermal buffer tube) in a physically different layout than typical Stirling convertor technology. The innovation here is to recognize the similarity between components and repackage the thermoacoustic components as closely as possible to the proven layout used for Sunpower's engines. In this way it will be possible to make direct comparisons of size, weight and efficiency between thermoacoustic and displacer-type Stirling convertors. The research will help NASA assess the relative benefits of thermoacoustic and displacer-type Stirling convertors for space power applications and may lead to technology uniquely suited to some missions where displacer-type technology is unacceptable for whatever reason. In Phase 1 we will optimize the concentric TASHE design to provide as much electrical output as possible from a single GPHS (nominally 220 W of heat delivered to the convertor). This design will use the same temperature levels currently used for the ASC convertor of 850 C hot end and 90 C reject. This will provide a direct comparison of size, mass, and efficiency differences between TASHE and displacer type convertors designed for the same application and using the same temperature levels. During Phase 1 we will also scale up this basic TASHE to a higher output power (~400W), and higher temperature levels, to provide a conceptual design of a high efficiency TASHE suited for Venus exploration.

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Public: This dataset is intended for public access and use. License: U.S. Government Work

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Metadata Created Date August 1, 2018
Metadata Updated Date February 28, 2019

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Harvested from NASA Data.json

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Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date February 28, 2019
Publisher Space Technology Mission Directorate
Unique Identifier TECHPORT_5647
Maintainer Email
Public Access Level public
Bureau Code 026:00
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Harvest Object Id 71218e41-9fd4-4a56-ac49-ca94d36fab0f
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2006-07-01
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Data Last Modified 2018-08-02
Program Code 026:027
Source Datajson Identifier True
Source Hash 29bc6e94d7bd2fa4a511444ed72e45df3a345cd5
Source Schema Version 1.1

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