• • Pump pressure drop scales linearly with depth: 622, 774, 924, and 1074 kPa at 2039, 2539, 3039, and 3539 m respectively for a 4.88 kg/s flow rate. This linearity confirms that frictional losses dominate over local losses, enabling predictable pump sizing for deeper wells without disproportionate hydraulic penalties.
• • Comprehensive heat transfer power (including pump power) increases nearly linearly with depth and deviates from net heat transfer power by less than 1.5%. This marginal penalty indicates that pump energy consumption is not a limiting factor for deep systems, and heat extraction remains the primary performance driver.
• • Per-unit-depth pump power decreases with increasing depth, meaning deeper wells dilute the parasitic pump load relative to total heat output. This favors deeper drilling from an energy efficiency standpoint, provided geological and drilling cost constraints are satisfied.
• • The numerical model achieved a maximum relative error of 4.26% (17.8 kW) against field data over 72 hours, validating its reliability for predicting long-term performance. This accuracy supports the use of such models for design optimization and risk assessment in medium-deep geothermal projects.