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Completed Research, December 2018

Completed Research, December 2018

1774

ASHRAE has already conducted much research on the compatibility of hydro-fluorocarbon (HFC) refrigerants and polyolester (POE) lubricants with process chemicals in refrigeration systems.

With the shift to low-global warming potential (GWP) hydrofluoro-olefin (HFO) refrigerants, ASHRAE performed another research project to study the chemical reactivity of process chemicals in HFO refrigerant blends.

These process chemicals include cleaners, degreasers, coolants, sealants, metalworking fluids, brazing fluxes, rust inhibitors, and can degrade system performance and reliability in HVAC&R systems if the react with the refrigerant or lubricant.

The final report details ASHRAE Standard 97 testing results and comments on safety and performance implications of 25 process chemicals in HFO refrigerant systems.

A technical paper has been published in ASHRAE Transactions.

1774-RP, Effects of System Materials towards the Breakdown of Lubricants and Low GWP Refrigerants, was sponsored by TC 3.2, Refrigerant System Chemistry.

The principal investigator was Dr. Ngoc Dung (Rosine) Rohatgi with Spauschus Associates.  

1766

An ASHRAE research project has developed a new tool called the Radiant Performance Explorer/Heat Balance (RPEHB).  

RPEHB is a C++ PC based tool that performs design-day heat balance calculations that yield surface temperatures, surface radiant and convective flux, system air loads and total radiant output. The tool calculated mean radiant temperature (MRT), and common comfort measures including PMV, PPD, operative temperature and radiant temperature asymmetry.

The RPEHB tool displays these results in a computer-graphics based visualization screen and allows export of comfort results.  

A technical paper has been submitted for future publication in ASHRAE Transactions.

1766-RP, Development of a Unified Tool for Analysis of Room Loads and Conditions, was sponsored by TC 6.5, Radiant Heating and Cooling.

The principal investigator was Mr. Chip Barnaby with Building Systems and Analytics LLC.  

The final reports for these projects are available for free to ASHRAE members at www.ashrae.org/technical-resources/technology-portal.

ASHRAE Transactions papers are available for $5 to ASHRAE members at www.ashrae.org/bookstore.

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