Dumitru “Dan” Mihalcea is a mechanical engineer specializing in the design of compressors and other refrigeration equipment, based in Romania. He holds several patents and is the author of articles and books in the refrigeration field. Among these he is co-author of the book Refrigeration Techniques, published by Technical Publishing House, in 1979. In the second volume of this book, he appears as author of Chapter 6, “Criteria for Use of Ferrous Material in Construction of Refrigeration Machinery.” For more information, he can be reached via email at dmihalcea2003@yahoo.com.

specific conditions of employing metals at low temperatures

Towards Improving the Design of Cast Iron Components for Refrigeration Equipment - Part 3

Dan Mihalcea

November 5, 2012

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The first two parts of this series dealt with the use of cast iron components in refrigeration equipment. This last part will focus on the construction of such components.

Towards Improving the Design of Cast Iron Components for Refrigeration Equipment - Part 2

Dan Mihalcea

October 22, 2012

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In the first part of this three-part series, we talked about the effect cold shortness has on the use of cast iron in refrigeration equipment. Now we will look at porosity and abrasion resistance.

Temperature dependence of failure energy of different cast irons and steels

Towards Improving the Design of Cast Iron Components for Refrigeration Equipment - Part 1

Dan Mihalcea

September 17, 2012

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There is a large body of publications regarding uses of cast iron. But very few of them are concerned with the use of cast iron in refrigeration equipment, and even less with the behavior of such materials at low temperatures.

On Demand Refrigerant Safety Classes A2L and A3 have a very low GWP, making them a strong, long-term solution for many HVACR applications. However, these refrigerants are classified as mildly flammable and highly flammable respectively. This flammability class raises safety and compliance concerns. This webinar will help you understand these classes, along with the opportunities these refrigerants can offer.

As the HVAC market continues to expand and Variable Refrigerant Flow (VRF) technologies continue to evolve, the demand for contractors with VRF expertise will only grow. This presentation provides thorough insight into the requirements, advantages and opportunities associated with specifying VRF systems and addresses the common misconceptions contractors may encounter in the field.

ACHRNEWS

2019 September 9

In this issue of The NEWS, we present the Residential Heating Showcase, featuring the latest heating equipment to hit residential HVAC. We also discuss developments in the tools and test instruments market.

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