Randall L Janssen

Title: Innovations of Randall L. Janssen

Introduction

Randall L. Janssen is a notable inventor based in La Crosse, Wisconsin. He has made significant contributions to the field of refrigeration and chiller systems. With a total of six patents to his name, his work has had a considerable impact on energy efficiency and system performance.

Latest Patents

Among his latest patents is the "Coaxial Economizer Assembly and Method." This invention features a coaxial economizer designed for use in chiller systems. It includes an inner housing and an outer housing with a common longitudinal axis. The outer housing has an inlet for receiving fluid from an upstream compressor stage and an outlet for conveying fluid to a downstream compressor stage. The design incorporates a flow chamber that forms a fluid flow path around the inner housing, along with a flash chamber that converts liquid state fluid to gas state. The flashed gas mixes with the incoming fluid, enhancing the efficiency of the system.

Another significant patent is the "Centrifugal Compressor Assembly and Method." This assembly is intended for compressing refrigerant in chiller systems with a capacity of 250 tons or larger. It features a motor that operates at various sustained speeds, controlled by a variable speed drive. The design includes a mixed flow impeller and a vaneless diffuser, optimizing the specific speed range for head and capacity combinations. This innovation aims to improve the performance and efficiency of centrifugal compressors.

Career Highlights

Randall L. Janssen is currently employed at Trane International Inc., a leading company in the HVAC industry. His work at Trane has allowed him to develop and refine technologies that contribute to energy-efficient cooling solutions. His expertise in refrigeration systems has positioned him as a valuable asset to the company.

Collaborations

Throughout his career, Janssen has collaborated with notable colleagues, including Rick Todd James and William J. Plzak. These collaborations have fostered innovation and the development of advanced technologies in the field of refrigeration.

Conclusion

Randall L. Janssen's contributions to the field of refrigeration through his patents and work at Trane International Inc. highlight his commitment to innovation and energy efficiency. His inventions continue to influence the industry and improve the performance of chiller systems.