Parametric investigations on compressor-driven metal hydride based cooling system. (25th March 2016)

• Record Type: Journal Article
• Authors: Muthukumar, P.; Patil, Manojkumar S.; Raju, Nithin N.; Imran, Mohd
• Is Part Of: Applied thermal engineering. Volume 97(2016:Mar.)
• Page Start: 87
• Page End: 99
• Publication Date: 2016-03-25
• Subjects: Metal hydride -- Hydrogen energy -- Compressor driven cooling system -- Performance test -- Specific cooling power; Heat engineering -- Periodicals; Heating -- Equipment and supplies -- Periodicals; Periodicals; 621.40205
• DOI: 10.1016/j.applthermaleng.2015.10.155
• Languages: English
• ISSNs: 1359-4311

Abstract

Highlights: Prototype of a CDMHCS has been tested for different operating conditions. Effects of operating temperatures on COP and SCP have been studied. Variation in hydride bed temperature during cyclic operation has been presented. Effectiveness of the hydride reactor has been studied. Abstract: In this article, the development of a compressor-driven metal hydride based cooling system (CDMHCS) employing two identical metal hydride reactors each embedded with 60 cooling tubes, filled with 2.75 kg of LmNi4.91 Sn0.15 hydride alloy for quasi-continuous cold generation is presented. Performances of the CDMHCS in terms Coefficient of Performance (COP) and Specific Cooling Power (SCP) along with the amount of hydrogen (H2 ) transferred in each cycle have been investigated at different refrigeration and sink temperatures, cold fluid flow rates and cycle times. The maximum COP and SCP of 2.2 and 53.5 W/kg respectively were observed for a cycle time of 8 min at cold fluid flow rate of 8 lpm, refrigeration and sink temperatures of 20 °C and 25 °C respectively. It was observed that COP and SCP of the system improved significantly with increase in refrigeration temperature; however, they decreased with increase in sink temperature.