What is the green stack number for geothermal power in Hong Kong?

Geothermal energy is produced constantly when the three layers of the earth shift and decay. The power available in the crust below Hong Kong is a very important topic because the geothermal power unit will produce energy regardless of the weather conditions. However, this power is not limitless. If the geothermal system sends down cold water and pulls out hot water, the heat is being taken from the rocks in the crust. The rocks in the crust won't put off near as much heat after continual usage because the heat from the core of the Earth takes so long to travel radially outward. The geothermal capital investment is what prevents most people from choosing this option. Drilling equipment is extremely expensive and hiring a trained drilling team to operate the equipment is just as pricey. McKay says that the average optimal drilling depth is about 15 km, at which temperature an ideal heat engine could deliver 17 mW/m 2. We will assume that the power stations are operating ar perfect efficiency and that every square meter of the island is used. Since Hong Kong has a staggering population density of about 6,500 people per km 2, wide-scale geothermal power would only provide about 0.1 kWh per person per day.