| 165 / | HD | HEAT EXCHANGE |
| DIG 9 | | HAVING A SOLID HEAT STORAGE MASS FOR ABSORBING HEAT FROM ONE FLUID AND RELEASING IT TO ANOTHER (I.E. REGENERATOR) {5} |
| DIG 10 | DD | .~> Cleaning storage mass {2} |
| DIG 13 | DD | .~> Movable heat storage mass with enclosure {3} |
| DIG 30 | DD | .~> Mass formed of modules arranged in three dimensional matrix ("Checkerwork") {4} |
| DIG 37 | DD | .~> Having flow diverting means (e.g. valve) to selectively control flow through storage mass {2} |
| DIG 42 | DD | .~> Particular structure of heat storage mass {1} |