| Abbreviation | Definition |
|---|---|
| JRSE | Journal of Renewable and Sustainable Energy |
| JSEE | Jamaica Society of Energy Engineers |
| JTEC | Johnson thermoelectric energy converter |
| KACARE | King Abdullah City for Atomic and Renewable Energy |
| KCE | King Country Energy |
| KE | Kinetic Energy |
| KEAL | Kinetic Energy Active Lifestyle |
| KEEA | Keystone Energy Efficiency Alliance |
| KER | Kinetic Energy |
| KER | kinetic energy released |
| KERMA | Kinetic Energy Released in MAtter |
| KERMA | Kinetic Energy Released in Matter and |
| KERP | Kamloops Energy Recovery Project |
| KERR | Kinetic Energy Recovery Rope |
| KERS | Kinetic Energy Recovery Systems |
| KERS | kinetic energy retrieval system |
| KESI | Kocken Energy Systems International |
| KET | Kinetic Energy Transfer |
| KEW | Kinetic Energy Weapon |
| KIC | InnoEnergy Challenge |