Simple applications such as direct uses and heat pumps do not carry the same costs as power generation projects. Geothermal power generation typically involves relatively high levels of capital investment. Such expenditure, required to prove the geothermal resource capacity, involves some risk. Geothermal power projects are characterized by high capital investment for exploration, drilling wells and installation of plant, but low operating costs because of the low marginal cost of fuel. Normally not suitable Maintenance and continued costs associated with geothermal energy are lower than those associated with fossil fuels.
Larger plants produce energy more cheaply than smaller plants, neither with ongoing costs for fuels.
Although geothermal energy is generally regarded as a low-impact renewable resource. Reinject all waste fluids Cascaded uses of waste fluids eg. Fish farms, pools Reinjection Cooling of reservoir Induced seismicity Scaling Careful planning of reinjection wells outside main reservoir Monitor flow patterns before reinjection eg. As we have already discussed there are few limitation to geothermal energy. The limitations to heat pump technology are relatively few, heat pumps can be installed anywhere to use the consistent temperature of the upper feet of the earth's surface.