ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting: Volume 1, Symposia – Parts A, B, and C
Read
Flow Characteristics of Electronic Expansion Valves for Heat Pump System Using Carbon Dioxide as a Refrigerant
Abstract
An experimental study on the flow characteristics of electronic expansion valves (EEVs) for heat pump system using carbon dioxide as a refrigerant have been carried out in this study. Many researches and efforts have been made to replace chemical refrigerants like Chloro-Fluoro-Carbon (CFC) and Hydro-Chloro-Fluoro-Carbon (HCFC) with natural refrigerants such as carbon dioxide and apply natural refrigerants to chillers or heat pump systems. In this study, we focused on the development of EEV and 4-way valve among the important components of heat pump system using natural refrigerant. The mass flow rate was measured at various EEV inlet temperature and pressure conditions with respect to several EEV openings operated at a heat pump system which has about 10 kW of cooling capacity. The heat pump system consists of a reciprocating compressor, a gas cooler, an evaporator, an EEV, and a 4-way valve which was developed for this study. The inlet temperature and pressure of an EEV was varied from 5°C to 40°C and from 7 MPa to 10 MPa, respectively. The mass flow rate of carbon dioxide through the EEV ranged from 50 g/s to 120 g/s. The mass flow rate of carbon dioxide around the critical point was affected by the inlet temperature and pressure of EEV, valve opening, and density variation. An empirical mass flow rate correlation of carbon dioxide based on the Buckingham π-theorem was developed in this study, and this correlation predicted experimental data within an average absolute deviation of 4.2%. The correlation can be applied to p...
Round-ups are the summaries of handpicked papers around trending topics published every week. These would enable you to scan through a collection of papers and decide if the paper is relevant to you before actually investing time into reading it.
Coronavirus Research Articles published between Aug 01, 2022 to Aug 07, 2022
Introduction: The corona virus disease (COVID)-19 is a severe acute respiratory syndrome (SARS-CoV-2) which is posing a great threat to mankind and ha...
Read MoreClimate change Research Articles published between Aug 01, 2022 to Aug 07, 2022
We use cookies to improve your website experience. To learn about our use of cookies and how you can manage your cookie settings, please see our Cooki...
Read MoreGood health Research Articles published between Aug 01, 2022 to Aug 07, 2022
Don’t have an account? Create a Free Account If you don't remember your password, you can reset it by entering your email address and clicking the Res...
Read MoreQuality Of Education Research Articles published between Aug 01, 2022 to Aug 07, 2022
Introduction: In 2014 the Accreditation Council for Graduate Medical Education modified adult training requirements for child neurology certification ...
Read MoreGender Equality Research Articles published between Aug 01, 2022 to Aug 07, 2022
Introduction: Opioid use disorder (OUD) is characterized as a problematic cycle of substance intoxication and binging, followed by associated withdraw...
Read MoreDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on “as is” basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The Copyright Law.