Showing 61 results for Author: Praveen K. Cheekatamarla
Sep, 2026
Journal
Vapor compression offers a more energy-efficient method of heating compared with traditional systems. Vapor compression system not only reduces carbon emissions but also helps lower utility bills by optimizing the consumption of electricity for heating and cooling. The overall cost-effectiveness of these technologies is influenced by factors such as system design, installa…
Aug, 2026
Conference Paper
The continued growth of data center infrastructure is intensifying demand for freshwater resources, particularly in water-stressed regions, and is increasingly limiting sustainable capacity expansion. This work investigates a conceptual hybrid system that integrates freeze desalination with ultrasonic-assisted ice separation to enable on-site production of pure water from…
Aug, 2026
Journal
Commercial refrigeration systems, particularly walk-in coolers and freezers, are essential for preserving perishable goods across various industries, including food storage and supermarkets. This paper presents a comprehensive review of advancements in walk-in coolers and freezers, focusing on three key areas: the transition to next-generation refrigerants, regulatory deve…
Jul, 2026
Conference Paper
Dryers are integral appliances in modern households, yet their significant power consumption remains a critical challenge for reducing energy bills and upgrades. This work presents the outcomes of a comprehensive investigation aimed at lowering the operating energy costs of the dryer through modeling and experimental approaches. Specifically, the objectives of this researc…
Jul, 2026
Conference Paper
Counterfeit refrigerants pose significant challenges to safety, system reliability, and operational effectiveness due to their harmful contaminants or incompatible chemical compositions. Utilizing these noncompliant products can lead to reduced efficiency, equipment failures, and expensive repairs. Additionally, heightened demand for alternative refrigerants during the ind…
Mar, 2026
Journal
Clothes drying is among the most power-intensive household end uses, and vapor compression-based clothes dryers offer substantial energy cost savings compared with conventional electric heater dryers. However, parasitic heat losses along the air path, that is, heat loss at the upstream of the drum, inside the drum, and at downstream of the drum, remain rarely quantified, b…
Mar, 2026
Conference Paper
Mar, 2026
Conference Paper
The hydrofluorocarbon (HFC) refrigerants used in the current refrigeration systems are facing a phase-down due to their higher greenhouse effect resulting in global warming, and thus HVAC&R industry has undergone a transition to low Global Warming Potential (GWP) refrigerants. Refrigerant mixtures are attractive alternatives since their composition can be tailored to compl…
Mar, 2026
Conference Paper
Current commercial refrigeration systems use refrigerants with global warming potential (GWP) values ranging from 1250 to 4000. The emergence of low GWP alternatives (GWP
Dec, 2025
Journal
The increasing prevalence of counterfeit and incompatible refrigerants presents significant risks to Heating, Ventilation, Air Conditioning, and Refrigeration (HVAC&R) systems, including compromised equipment performance, safety hazards, and non-compliance. This article details the development of a novel, cost-effective, and portable detection device designed to accurately…
Nov, 2025
ORNL Report
This project investigated the use of a Centrifugal Particle Separation (CPS) system to improve the durability and operational reliability of outdoor heat exchangers in vapor-compression based heating, ventilation, air conditioning, and refrigeration (HVACR) systems. The developed method introduced a novel dust and fouling mitigation approach by integrating an ambient air p…
Oct, 2025
ORNL Report
The increasing prevalence of counterfeit refrigerants presents significant risks to Heating, Ventilation, Air Conditioning, and Refrigeration (HVACR) systems, including compromised equipment performance, safety hazards, and environmental non-compliance. This report details the development of a novel, cost-effective, and portable detection device designed to accurately iden…