Effect of Inlet Pressure, Size and Wind Speed of an Evaporator on Amount of Refrigerant Charge and Performance of a Portable Propane Air Conditioner

Paper

Tangalajuk Siang, Jeri and Sharifian, Ahmad. 2018. "Effect of Inlet Pressure, Size and Wind Speed of an Evaporator on Amount of Refrigerant Charge and Performance of a Portable Propane Air Conditioner." 4th International Conference on Science and Technology (ICST 2018). Yogyakarta, Indonesia 07 - 08 Aug 2018 New York, United States. https://doi.org/10.1109/ICSTC.2018.8528623
Paper/Presentation Title

Effect of Inlet Pressure, Size and Wind Speed of an Evaporator on Amount of Refrigerant Charge and Performance of a Portable Propane Air Conditioner

Presentation TypePaper
AuthorsTangalajuk Siang, Jeri (Author) and Sharifian, Ahmad (Author)
Journal or Proceedings TitleProceedings of the 4th International Conference on Science and Technology (ICST 2018)
Article NumberTS-091
Number of Pages6
Year2018
Place of PublicationNew York, United States
ISBN9781538658130
Digital Object Identifier (DOI)https://doi.org/10.1109/ICSTC.2018.8528623
Web Address (URL) of Paperhttps://ieeexplore.ieee.org/document/8528623
Conference/Event4th International Conference on Science and Technology (ICST 2018)
Event Details
4th International Conference on Science and Technology (ICST 2018)
Event Date
07 to end of 08 Aug 2018
Event Location
Yogyakarta, Indonesia
Abstract

Previous studies show that propane refrigerant has good performance in air conditioners, but the drawback of its flammability needs attention. The propane air conditioner should be designed for minimum refrigerant charge. In this work, the amount of refrigerant charge and cooling capacity of the air conditioner are the focus of analysis. The effect of the evaporator's variation of inlet pressure and variation of air speed over the evaporator on cooling capacity and amount of refrigerant within the evaporator are discussed. This research is mainly computational work with limited experimental validation. We found that, for a single duct portable propane air conditioner, cooling capacity increases from 0.956 kW to 4.319 kW when the inlet pressure of the evaporator is changed from 0.8 MPa to 0.4 MPa. Under the same condition, the accumulated refrigerant mass within the evaporator decreases from 176.846 g to 67.768 g. Increase in air speed over the evaporator increases the cooling capacity from 3.208 kW to 4.275 kW when the air speed increases from 1.0 m/s to 3 m/s, while refrigerant mass decreases from 110.307 g to 68.033 g. It should be noted that, at the lower inlet pressure of the evaporator, frost quickly appears on evaporator coils.

Keywordsair conditioning, cooling, design engineering, evaporation, flammability, indoor environment, organic compounds, refrigerants, refrigeration
ANZSRC Field of Research 2020401702. Dynamics, vibration and vibration control
401408. Manufacturing processes and technologies (excl. textiles)
401204. Computational methods in fluid flow, heat and mass transfer (incl. computational fluid dynamics)
401703. Energy generation, conversion and storage (excl. chemical and electrical)
409999. Other engineering not elsewhere classified
401205. Experimental methods in fluid flow, heat and mass transfer
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Byline AffiliationsSchool of Mechanical and Electrical Engineering
Institution of OriginUniversity of Southern Queensland
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