A gravity-driven energy pump apparatus and method for reverse osmosis desalination utilizing the gravitational force of an electrified weight-bearing vehicle. Comprised of upright support stanchion posts, an axle, and a linear track with protective end stops located on opposite ends. Wherein the central section of the track is affixed to the axle, enabling rotation when gravitational force is applied, thus tilting the opposite side on the axle. Further comprises an electrified weight-bearing vehicle (EWBV) positioned atop the track allowed to move back and forth, exerting gravitational force and inducing rotation. A solar PV array is affixed to the top of the EWBV to generate solar energy to power the battery. Chains affixed to both ends of the track catch the falling weight of the track. The action rotates drive and pinion gears to push pistons into pressure cylinders, facilitating fluid pumping between pressure cylinders and a pre-filtered water reservoir.

An interior space climate control system featuring a temperature differential engine, with the temperature differential engine configured to exploit the temperature differential of at least two sources with different temperatures. The fluids may be used to provide additional benefits to an interior space, such as heating, hot water, cooling, and refrigeration, and unused climate control fluids may in turn be used as sources of fluids with temperature differentials.

Systems and methods are presented for enhancing energy production and storage by integrating solar energy with geothermal processes. In certain embodiments, a hybrid geothermal/solar system increases energy yield from a closed loop geothermal system, stores heat in a wellbore, enhances power generation from geothermal brine, and/or facilitates carbon dioxide sequestration or conversion to fuel, all preferably utilizing solar energy as a supplemental heat source.