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Design of a direct-contact thermal energy storage heat exchanger for the NIST net-zero residential test facility: Part 1 flow observation.

Number: 2121

Author(s) : KEDZIERSKI M., LIN L.

Summary

This paper describes the first part of the design of a direct-contact heat exchanger (DCHEX) to be used for thermal energy storage in the Net-Zero Energy Residential Test Facility (NZERTF) at the National Institute of Standards and Technology (NIST). The heat exchanger was designed for heat exchange between a phase-change material (PCM) and refrigerant. The design required the selection of a PCM that would be immiscible with the refrigerant and have a freezing point temperature of approximately 285 K. A key facet of the present investigation was the construction of a test apparatus to observe the flow between the refrigerant and the freezing PCM to ensure a well-distributed flow and one where the refrigerant could flow past the frozen PCM. The companion paper, Part 2, presents a design for direct-contact heat exchange between the PCM octanoic acid and the refrigerant R410A.

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Pages: 8 p.

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  • Original title: Design of a direct-contact thermal energy storage heat exchanger for the NIST net-zero residential test facility: Part 1 flow observation.
  • Record ID : 30030474
  • Languages: English
  • Subject: Technology
  • Source: 2022 Purdue Conferences. 19th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2022/07/10

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