Thermal energy system, coupled to a building energy system, which selectively provides heating and/or cooling to a building. The thermal energy system includes a heat pump system, first and second geothermal systems, and first and second switch assemblies, and the first and second switch assemblies are selectively switchable to thermally interconnect the first and second geothermal systems to each other on a primary input side of the heat pump system or on a second output side of the heat pump system, and: a) the first and second switch assemblies are adapted to be switchable to provide a first operation mode which thermally connects the first geothermal system to the heating output and the second geothermal system to the cooling output, and the heat pump system being thermally unconnected to the first and second geothermal systems; or b) the first and second switch assemblies are adapted to be switchable to provide a first operation mode which thermally connects together the first and second geothermal systems via the heat pump system, and the heating output and cooling output being thermally unconnected to the first and second geothermal systems.

Provided is a borehole-type seasonal heat storage system and, more particularly, to a borehole-type seasonal heat storage system capable of selecting a heat storage space according to a supply temperature of a heat source, wherein a first heat storage tube member is formed to comprise a supply tube and a recovery tube, which are formed in ring types, respectively, and to have a U-shaped vertical tube connected to the bottom surface thereof such that the same is inserted into a borehole; an n.sup.th heat storage tube member is formed to have a supply tube and a recovery tube, which have diameters larger than those of the supply tube and the recovery tube of the first heat storage tube member, respectively; the n.sup.th heat storage tube member is arranged outside the first heat storage tube member at an appropriate interval, thereby forming a seasonal heat storage body; the supply temperature of a heat source flowing into a main supply tube and the underground temperature of each part of the seasonal heat storage body are measured; and, according to the supply temperature of the heat source, heat is supplied to the first heat storage tube member or the n.sup.th heat storage tube member, which has the corresponding temperature, and is stored, thereby improving the heat storage performance.

A subsea heat exchanger for cooling or heating a hydrocarbon-containing fluid includes a convection section enclosed by a shell or enclosure comprising, one or more heat exchanging fluid inlet(s) and outlet(s), one or more hydrocarbon-containing fluid inlet(s) and outlet(s), and one or more fluid carrying convection tube(s) adapted for heat transfer between the hydrocarbon-containing fluid on the inside of the tube(s) and a surrounding heat exchanging fluid on the opposite side of the tube(s). The heat exchanger also includes one or more flow regulating device(s) for controlling the hydrocarbon-containing fluid outlet temperature. The heat exchanging fluid circulates in a closed circuit for heat transfer both with said hydrocarbon-containing fluid and with surrounding sea water on the outside of the enclosure.

Systems and methods for generating and a controller for controlling generation of geothermal power in an organic Rankine cycle (ORC) operation to thereby supply electrical power to one or more of in-field operational equipment, a grid power structure, and an energy storage device. In an embodiment, during hydrocarbon production, a temperature of a flow of heated fluid from a source or working fluid may be determined. If the temperature is above a vaporous phase change threshold of the working fluid, heat exchanger valves may be opened to divert flow of heated fluid to heat exchangers to facilitate heat transfer from the flow of wellhead fluid to working fluid through the heat exchangers, thereby to cause the working fluid to change from a liquid to vapor, the vapor to cause a generator to generate electrical power via rotation of an expander.

Systems and methods for generating and a controller for controlling generation of geothermal power in an organic Rankine cycle (ORC) operation to thereby supply electrical power to one or more of in-field operational equipment, a grid power structure, and an energy storage device. In an embodiment, during hydrocarbon production, a temperature of a flow of heated fluid from a source or working fluid may be determined. If the temperature is above a vaporous phase change threshold of the working fluid, heat exchanger valves may be opened to divert flow of heated fluid to heat exchangers to facilitate heat transfer from the flow of wellhead fluid to working fluid through the heat exchangers, thereby to cause the working fluid to change from a liquid to vapor, the vapor to cause a generator to generate electrical power via rotation of an expander.

Provided here is an architectural plan (the solution) for the restoration of the terminal lake, the Salton Sea, an area of prevalent geothermal sources. It includes division of the Lake into three sections, preventing pollution of the Lake from nearby farmlands and importing seawater in central section with pipeline system; providing condition for tourism, and wildlife sanctuary; generating electricity by harnessing hydro, solar, and geothermal energy; and producing potable water and lithium as byproducts. Also includes a system and method for harnessing geothermal energy for generation of electricity by using complete closed loop heat exchange systems combined with onboard drilling apparatus. The system includes several devices operating separately in many different applications in energy sectors, Also, included is alternative use for the In-Line-Pump for marine crafts propulsion.

A geothermal system including a multitube vertically-sealed underground heat-exchanger includes: a geothermal well formed by vertically excavating a foundation; a heat pump which is arranged in the foundation, and which includes a circulating pump; and a connection tube, an auxiliary facility, and a multitube vertically-sealed underground heat-exchanger which are buried and installed in the geothermal well, and which are connected to the heat pump such that a thermal fluid thermally restored in the geothermal well is supplied to the heat pump through the circulating pump, and the thermal fluid that has undergone heat exchange in the heat pump is recovered back to the geothermal well and thermally restored therein.

Systems and methods for harvesting geothermal energy use temperature-based flow control to optimize the extraction of thermal energy from a geothermal reservoir. In one example, a thermal transport fluid is flowed into a wellbore traversing a thermal reservoir of a formation. Flow of the thermal transport fluid into and out of the thermal reservoir is dynamically controlled at each of a plurality of injection and/or return locations in response to a downhole parameter such as temperature. For example, flow may be controlled so that the flow into the thermal reservoir is greater at the injection locations where the temperature is hotter and that the flow out of the thermal reservoir is greater at the return locations where the temperature is hotter. The thermal transport fluid produced from the return locations is then conveyed to surface to extra the thermal energy.

An underground heat exchanger has a bottomed tubular flexible bag body accommodated in an accommodation hole portion in the ground, and an outer tube accommodated in the accommodation hole portion, vertically extending along an outer surface portion of the bag body and communicating in its lower end with a lower end of the bag body. The outer surface portion of the hardening resin bag body can cover an inner wall portion of the accommodation hole portion in a closely contact state with the bag body being inflated. The bag body is hardened in the covering state, a lining tubular body formed by the hardening can form a liquid storage tank for storing a heat medium liquid in its internal space, and the outer tube is pinched between the outer surface portion of the bag body and the inner wall portion.

A gravity-assisted heat pipe ground cooling source cold storage system and a chiller set. The cold storage system includes a gravity-assisted heat pipe, a cold storage pool, a heat exchanging and cold condensing device, and a heat exchanger pipe. An inlet and outlet of the cold storage pool are parallel-connected to cold water pipes of a chiller set, and are connected or disconnected via control valves. The heat exchanger pipe is buried underground, and includes a flow inlet pipe and a flow return pipe having a cross section including a first arc, a second arc, a third arc, and a fourth arc. The second arc and the fourth arc are S-shaped arcs. The first arc has a radius exceeding that of the third arc, and centers of circles of the first arc and third arc are located at the cross section of the flow return pipe.