|
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 |
|
|
|
|
|