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JMC (USA), Inc.

Hydrogen Storage Alloy
ISO 9001 Certified Production Facility

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Heat Pump and Thermal Management Systems

The hydrogen absorption process is exothermic, and the hydrogen desorption process is endothermic. The heat pump and thermal storage systems take advantage of these properties. The metal hydride heat pump and thermal storage systems do not require a compressor or evaporator. Therefore, they are compact and can operate at temperatures below 200oC. These thermal storage systems can store heat for long periods with minimal loss.

Thermal Storage System
(installed at Kogakuin University)

Item High Pressure Side Low Pressure Side
Metal Hydride MmNi Alloys LmNi Alloys
Quantity (kg) 2,500 2,500
Storage capacity (Nm3) 380 380
OUTPUT
(Kcal)
Thermal storage 60,000 (Input)
Cooling 55,000 200,000
Heating (Radiation) 180,000
Output operation time (hr) 6
Input storage time (hr) 8

Heat Pump
(jointly developed with Kogakuin University)

Item Cooling System Heat Pump
Metal hydride LaNi Alloys MmNi Alloys LmNi3 Alloys
MH Quantity (kg) 20 20 48 (16 x 3)
Heat Source Temperature (oC) 150 170
Heating medium Air Water
Output (kcal/Hr) 2,000 8,000
Efficiency (Output/Input) 0.45 1.6
Output cycle (Cycle/Hr) 4 8.5
Output Temperature (oC) 10 45/15
Purpose Cooling Cooling and Heating


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