Geothermal energy in the "heat, mineral, water" trinity of the heat refers to what

Geothermal energy is natural thermal energy extracted from the earth's crust. The energy comes from the molten rock inside the earth and exists in the form of heat, which is the energy that causes volcanic eruptions and earthquakes.

According to its storage form, geothermal resources can be divided into five categories: steam type, hot water type, ground pressure type, dry hot rock type and lava type. China generally higher than 150 ℃ is called high-temperature geothermal, mainly used for power generation. Below this temperature is called low-temperature geothermal, usually used directly for heating, industrial and agricultural heating, aquaculture and medical and bathing.

We can see that "heat" refers to the heat brought out by the water.

See "heat" refers to the heat brought out by the water.