Chapter 15, Problem 5P

(a)In geothermal aquifer, explain the process of energy extraction from twin borehole system.   (b)A geothermal aquifer at a temperature of 90 o C is 18 m thick and 120 m wide. The density, specific heat, and permeability are 2.6x10 3 kg/m3, 1000j/kg.C and 2x10 -9 s-m 3 /kg. In order to produce a power of 0.8 MW, estimate the volume flow rate and pressure drop required for a borehole separation of 800 m. The inlet temperature of cold water is 15 o C.

Describe geothermal energy and how we harness it, and evaluate its advantages and disadvantages

You are asked to determine the  depth of the well in (cm)  for  a geothermal operation  for producing a power of  854.5 KJ/sec  for a water mass flow rate of 2.730 x 106 Kg / hour .