| 主权项 |
1. A heat engine system, comprising:
a working fluid circuit having a high pressure side and a low pressure side and being configured to flow a working fluid therethrough, wherein at least a portion of the working fluid comprises supercritical carbon dioxide; and a turbopump coupled to the working fluid circuit and comprising:
a pump portion;a drive turbine coupled to the pump portion, fluidly coupled to and disposed between the high pressure side and the low pressure side, and configured to convert a pressure drop in the working fluid to mechanical energy;a driveshaft coupled to the drive turbine and the pump portion and configured to drive the pump portion with the mechanical energy to enable the pump portion to circulate the working fluid through the working fluid circuit, wherein the driveshaft is at least partially contained within a housing;a dry gas seal circumferentially disposed about the driveshaft between the driveshaft and the housing at a first axial location along the driveshaft;a magnetic liquid seal circumferentially disposed about the driveshaft between the driveshaft and the housing at a second axial location along the driveshaft, wherein a fluid leakage cavity is formed between the dry gas seal at the first axial location and the magnetic liquid seal at the second axial location; andan extraction port disposed in the housing and configured to enable recovery of a leaked fluid from the fluid leakage cavity. |
