Details page | Paper / Information search system

Search

Search help

Summary & Details

Testing of Novel Refrigerants in an Indirect Automotive Heat Pump Module Drop in Comparison of R-1234yf, R-474B, R-491A, and R-290

Delivery: Available on this site

Format: PDF

Price: Non-members (tax incl.)：￥1,100 Members (tax incl.)：￥880

Publication code: 20265298

Paper/Info type: Proceedings (Spring)

No.69-26

Pages: 1-8(Total 8 p)

Date of publication: May 2026

Publisher: JSAE

Language: English

Event: 2026 JSAE Annual Congress (Spring)

Detailed Information

Author(J)	1) Miloš Fojtlín, 2) Ján Tuhovčák, 3) Tomáš Mrkvica
Author(E)	1) Miloš Fojtlín, 2) Ján Tuhovčák, 3) Tomáš Mrkvica
Affiliation(J)	1) SATTELO, 2) SATTELO, 3) SATTELO
Affiliation(E)	1) SATTELO, 2) SATTELO, 3) SATTELO
Abstract(E)	Driven by electric mobility and mobile machinery needs, the market demands efficient thermal management with refrigerants that work across climates, meet low-GWP and PFAS-free requirements, and require minimal system changes. This study evaluates two novel blends, R474B and R491A, as drop-in candidates versus common automotive refrigerants. Laboratory tests under heating, cooling, and high-load conditions show performance can be limited by existing equipment and safety constraints, though cooling and dehumidification needs were met. Overall, the results show the new refrigerants are technically viable and offer a promising path for future EV thermal management.

About search

How to use the search box

You can enter up to 5 search conditions. The number of search boxes can be increased or decreased with the "+" and "-" buttons on the right.

If you enter multiple words separated by spaces in one search box, the data that "contains all" of the entered words will be searched (AND search).

Example) X (space) Y → "X and Y (including)"

How to use "AND" and "OR" pull-down

If "AND" is specified, the "contains both" data of the phrase entered in the previous and next search boxes will be searched. If you specify "OR", the data that "contains" any of the words entered in the search boxes before and after is searched.

Example) X AND Y → "X and Y (including)" X OR Z → "X or Z (including)"

If AND and OR searches are mixed, OR search has priority.

Example) X AND Y OR Z → X AND (Y OR Z)

If AND search and multiple OR search are mixed, OR search has priority.

Example) W AND X OR Y OR Z → W AND (X OR Y OR Z)

How to use the search filters

Use the "search filters" when you want to narrow down the search results, such as when there are too many search results. If you check each item, the search results will be narrowed down to only the data that includes that item.

The number in "()" after each item is the number of data that includes that item.

Search tips

When searching by author name, enter the first and last name separated by a space, such as "Taro Jidosha".