The electrical power generation is estimated with a similar approach to for the indirect water system (see Fig. ), with two changes. First, the TOUGH2 reservoir is replaced with an analytical solution for impedance (see Sec 2.1). Second, wellbore heat loss is included for the production well (see Sec. 2.2), which was not considered in . Power generation is found without considering pressure depletion in the reservoir. Fig. shows the cycle schematics for the indirect water Organic Rankine Cycle (ORC). In the lower loop, the primary fluid (water) is circulated from the surface; through the reservoir, where it gains heat; and back to the surface, where it gives heat to the secondary working fluid. In the upper loop, the secondary fluid (R245fa) is heated from the primary fluid and drives the ORC to produce electricity. For more description of the ORC, see .