481 results about "Geothermal heat pump" patented technology

A sealed well direct expansion geothermal heat exchange unit, whose sealed well can be placed in ground and / or in water, consisting of a conventional direct expansion, or other heat pump, system wherein the exterior refrigerant heat exchange lines are placed within an insulated and sealed container, which container is supplied with a circulating heat conductive liquid from and to a sub-surface sealed well encasement, which container liquid may be supplemented with heat from a solar heating system, and which unit's hot refrigerant vapor line may be supplementary cooled by means of condensate water evaporative cooling, as well as a means to provide any direct expansion, and any closed-loop water-source, geothermal heat pump system with an optional solar heating supplement in the heating mode, and with an optional water-cooled vapor line supplement in the cooling mode.

A thermally conductive cement-sand grout for use with a geothermal heat pump system. The cement sand grout contains cement, silica sand, a superplasticizer, water and optionally bentonite. The present invention also includes a method of filling boreholes used for geothermal heat pump systems with the thermally conductive cement-sand grout. The cement-sand grout has improved thermal conductivity over neat cement and bentonite grouts, which allows shallower bore holes to be used to provide an equivalent heat transfer capacity. In addition, the cement-sand grouts of the present invention also provide improved bond strengths and decreased permeabilities. The cement-sand grouts can also contain blast furnace slag, fly ash, a thermoplastic air entraining agent, latex, a shrinkage reducing admixture, calcium oxide and combinations thereof.

System and methods for creating shaped, non-circular boreholes in rocks especially for use with geothermal heat pump applications and for increasing wellbore support in applications such as horizontal oil and gas drilling are described. The systems and methods when applied to geothermal heat pumps create an elliptical shaped hole that is optimized for placing heat transfer tubes with a minimum of grout used. The significantly reduced cross-sectional area of the elliptical borehole also increases the overall drilling rate in rock and especially in hard rocks. In horizontal hard-rock drilling, creation of a horizontal non-circular borehole or modification of a circular borehole to a non-circular geometry is used to stabilize the borehole prior to casing insertion, and may also allow the use of lower mud pressures improving drilling rates. The system uses a non-contacting drilling system which in one embodiment uses a supersonic flame jet drilling system with a movable nozzle that swings between pivot points. In a second embodiment the elliptical shaped hole is created by an abrasive fluid or particle bearing-fluid or air jet drill that moves between pivot points. In another embodiment a non-contacting drill can use dual parallel nutating nozzles that create a pair of overlapping circular holes. The non-circular shaped hole is created by either the high temperature flame or water-particle jet or chemically active fluid jet as it removes rock material by erosion, dissolution and or thermal spalling. Modifications of circular boreholes to a generally elliptical shape can also be done using milling or jetting techniques.

System and methods for creating shaped, non-circular boreholes in rocks especially for use with geothermal heat pump applications and for increasing wellbore support in applications such as horizontal oil and gas drilling are described. The systems and methods when applied to geothermal heat pumps create an elliptical shaped hole that is optimized for placing heat transfer tubes with a minimum of grout used. The significantly reduced cross-sectional area of the elliptical borehole also increases the overall drilling rate in rock and especially in hard rocks. In horizontal hard-rock drilling, creation of a horizontal non-circular borehole or modification of a circular borehole to a non-circular geometry is used to stabilize the borehole prior to casing insertion, and may also allow the use of lower mud pressures improving drilling rates. The system uses a non-contacting drilling system which in one embodiment uses a supersonic flame jet drilling system with a movable nozzle that swings between pivot points. In a second embodiment the elliptical shaped hole is created by an abrasive fluid or particle bearing-fluid or air jet drill that moves between pivot points. In another embodiment a non-contacting drill can use dual parallel nutating nozzles that create a pair of overlapping circular holes. The non-circular shaped hole is created by either the high temperature flame or water-particle jet or chemically active fluid jet as it removes rock material by erosion, dissolution and or thermal spalling. Modifications of circular boreholes to a generally elliptical shape can also be done using milling or jetting techniques.

The invention discloses a pile-embedding spiral pipe typed ground source heat pump system and a heat transmission model of a geothermal heat exchanger thereof. A solid cylindrical surface heat source model is put forward for the first time and two analytic solution expressions of the heat transmission model is worked out by the Green function method. The system can sufficiently utilizes the underground area of a building, saves a great amount of expenses for boring and pipe embedding, reduces the initial investment of the ground source heat pump system, improves the construction efficiency and has convenient and quick construction. Furthermore, the heat transmission model of the pile-embedding spiral pipe geothermal heat exchanger can quantitatively analyze the effects of all parameters of the pile-embedding spiral pipe geothermal heat exchanger on the heat transmission capability and provides a basis for the engineering design. The structure of the pile-embedding spiral pipe typed ground source heat pump system comprises the geothermal heat exchanger which is connected with an air conditioning heat pump system by pipelines; the air conditioning heat pump system is connected with a conveying and end system in the building; the geothermal heat exchangers have the quantity of more than one; and each geothermal heat exchanger forms the pile-embedding spiral pipe-typed geothermal heat exchanger by building pile foundations and spiral pipes which are embedded in the pipe foundations.

The present invention relates to a geothermal water heater system, and methods of heating water for domestic uses utilizing geothermal energy. More specifically, the present invention provides a geothermal heat pump water heater system includes a hot water tank, a cold water tank and at least one water-to-water heat pump. As contemplated, the water-to-water heat pump includes one or more heat exchangers which control heat transfer from water drawn from an outside water source. The outside water source water is supplied to both the hot water tank and the cold water tanks whereupon heat exchangers which comprise a cold water side heat exchanger and a hot water side heat exchanger, allow water entering the cold water tank to be cooled and returned to the cold water tank while water entering the hot water tank is heated and returned to the hot water tank.

The invention discloses a self-balancing integrated application system of a solar energy-ground source heat pump, comprising an air conditioner end system, a ground source heat pump system, a hot water supply system, a solar energy heat-collection system and an automatic control system, wherein the ground source heat pump system comprises a ground buried pipe heat exchanger (6), a compressor (1),an indoor side heat exchanger (3) and an environment side heat exchanger (5), and the automatic control system is used for controlling all the automatic equipment in the self-balancing integrated application system of the solar energy-ground source heat pump. The invention can effectively realize the functions of cold and warm air conditioning and hot water supply, mainly can switch the working modes of the ground source heat pump and a solar energy hot water system automatically by the control system, thereby solving the problem of imbalance of the ground source heat pump in winter and summerand enhancing the utilization rate of regenerative energy (solar energy and geothermal energy) in energy used for construction to the maximum.

A composite energy system of solar energy, ground source heat pump and chilled water storage comprises an air conditioner, a domestic hot water supply device, one or more device (hereinafter referred to as host) of a solar energy heat-collecting device, a heat storage water tank unit, a cold storage water tank unit and a ground source heat pump system, a ground heat exchanger, an auxiliary heating device, a circulating water pump, a first electric three-way valve, a second electric three-way valve, a first electric two-way valve and a second electric two-way valve, wherein the circulating water pump is communicated with the air conditioner, and the auxiliary heating device is communicated with the domestic hot water supply device. The invention fully utilizes renewable energy sources such as solar energy, geothermal energy and biomass energy to masterly combine the ground source heat pump air-conditioning system with the solar energy hot water system and the chilled water storage system and construct a comprehensive energy system combined by the domestic hot water system, the ground source heat pump, the chilled water storage air-conditioning system and the like; and the invention is completely combined with the entire building so as to greatest reduce the floor space and the investment and increase the energy efficiency and economic performance of the system.

The invention discloses a precession-type backfill grouting ground source thermal energy conversion precast pile device, which comprises a plurality of precession-type backfill grouting prefabricated screw piles respectively embedded into pile holes, wherein a vertical heat exchanger is embedded in each screw pile; the inlet end and the outlet end of each vertical heat exchanger respectively extend out of an opening at the upper end of the screw pile to be respectively connected with a horizontal liquid-feeding collecting pipe and a horizontal liquid outlet collecting pipe in a bearing platform or a cushion layer; centring brackets are arranged at an interval of 1-3 m along the length direction of each vertical heat exchanger; each precession-type backfill grouting prefabricated screw pile comprises a hollow pile core, wherein the bottom of the pile core is provided with a cone-shaped pile head; a screw blade is arranged on the position far away1-3m from the lower part of the outer wall of the pile core; and a post grouting reinforcing layer is poured between the middle upper part of the outer wall of the pile core and a pile hole wall. The precession-type backfill grouting ground source thermal energy conversion precast pile device comprises a plurality of precession-type backfill grouting prefabricated screw piles, and the vertical heat exchanger is embedded in each screw pile; the pile foundation construction and the ground source heat pump construction are integrated so as to avoid a drilling and pipe-laying program of a ground source heat pump system on the ground, greatly lower the front-end investment cost and save the land use area; and the post grouting reinforcing layer is poured between the middle upper part of the outer wall of the pile core and the pile hole wall so as to enlarge a heat conduction area, improve the heat conduction performance and simultaneously improve the pile body bearing capacity.

The invention relates to the ground source heat pump technique and particularly relates to a device for monitoring the ground source heat pump system based on the internet of things. The device comprises a soil temperature wireless sensor, an outdoor air temperature wireless sensor, an indoor temperature wireless sensor, water inlet-outlet temperature wireless sensors arranged on a cold-hot resource side and an air conditioner loading side of a cold water machine set, a flow wireless sensor, a wireless intelligent ammeter, a wireless signal collecting module, a local server and a remote monitoring computer. The wireless signal collecting module collects the parameter of each sensor according to the ZigBee protocol, transmits the parameters to the local server by the Internet according to the Modbus protocol, and then stores, computes and displays the COP (coefficient of performance) and the WTF (water transport factor) curves by the ground source heat pump system, and finally transmits the parameters to the remote monitoring computer by the Internet. The device can obtain the CPI (comprehensive performance index), the COP (coefficient of performance) and the WTF (water transport factor) of the ground source heat pump, and is beneficial to monitoring the daily energy-saving situation of the ground source heat pump system and providing evaluation data for the energy-saving improvement of the system.

The invention discloses a solar and GSHP (ground source heat pump) combined energy supply system for buildings. The sytsem provided by the invention comprises two subsystems, namely a solar and auxiliary GSHP system and a pure GSHP system, wherein the solar and auxiliary GSHP system comprises a solar thermal collector, a thermal storage water tank, a GSHP unit No.1, a ground heat exchanger No.1, a collected heat circulating water pump, a unit ground source collateral circulation water pump No.1, a unit user collateral circulation water pump No.1, indoor end equipment, a collected heat controlvalve, a heat accumulation control valve, solar supply heat control valves No.1 and No.2, a unit ground source collateral control valve No.1, a unit user collateral control valve No.1, heat accumulation / heat supply operational mode switch control valves No.1-No.4 and a connecting line; the pure GSHP system comprises a GSHP unit No.2, a ground heat exchanger No.2, a unit ground source collateral circulation water pump No.2, a unit user collateral circulation water pump No.2, indoor end equipment, a unit ground source collateral control valve No.2, a unit user collateral control valve No.2 and a connecting line.

The invention discloses a double source parallel step type heat pump hot water air-conditioning system. The system preferentially utilizes solar energy to collect heat and utilizes a geothermal heat pump or an air source heat pump for combined heating and air conditioning, and can supply hot water. The system comprises a high temperature heat source heat exchange circle which preferentially utilizes solar energy, two heating air-conditioning heat exchange circles which are connected in parallel, a four-valve parallel step heat pump circle and a low temperature heat exchange system. A heat accumulating tank is a heat connecting and heat exchanging hub. The system can absorb heat energy in soil or air source by using a low-temperature heat pump heat accumulating circle, or further accumulate heat by using a solar heat collecting system and other high temperature heat sources. The heat accumulating water tank can directly supply heat to the heating system when the water temperature is high, or indirectly supply heat after enhancing the heat grade through the heat pump heat supply circle when the water temperature is low. In summer, the system has two air conditioning modes; and the system can cool and lower the temperature for indoor, and transfer excess heat to domestic hot water or discharge the excess heat to the low temperature heat source. When the heat accumulating water temperature exceeds the limit, the system can also discharge heat in an emergency.

A solar energy-geothermic-source combining system for supplying heat and hot water, generating electric energy and refrigerating is composed of thermoelectric cells, solar heat collecting tubes, thermoelectric relay, heat accumulator, safety valve, auxiliary heater, mixer, room heating regulator, electric accumulator set, inverter, KW-hour meter, bidirectional pump, compressor, reverse valve, throttle valve, underground heat exchanger and geothermic pump set.

The invention discloses a heat pipe ground-source heat pump system which comprises a ground heat pump unit and an underground heat pipe; an inlet of a compressor in the ground heat pump unit is connected with an outlet of an evaporator, the outlet of the compressor is connected with the inlet of a water-cooled condenser, the outlet of the water-cooled condenser is connected with the inlet of a liquid storage device, the outlet of the liquid storage device is connected with an electromagnetic valve, the inlet of a throttle valve is connected with the outlet of the electromagnetic valve, and the outlet of the throttle valve is connected with the inlet of the evaporator. The underground heat pipe is composed of a group of heat pipes, the group of the heat pipes are vertically arranged in an underground hole, and the upper parts of the group of the heat pipes are connected with the evaporator. Heat pipe media are filled in the group of the heat pipes. The heat pipe ground-source heat pump system of the invention does not need a circulating pump, thereby saving power consumption; working media adopted in the heat pipes can not corrode the underground heat pipe, so the heat pipes can be used for a long time; the underground heat pipe is short, and the flow resistance of a secondary refrigerant is small; as the gas-liquid phase change heat exchange is occurred in the heat pipes, the heat flux density is high.

Present invention discloses a portable cliff soil heat physical property tester and method. It solves mismeasurement problem of underground cliff heat physical property in current ground source heat pump system design. It contains portable cliff soil heat physical property tester based on ground source heat pump, at least one flow sensor, at least one exhaust I, at least one water circulating pump, at least one exhaust II, at least one electric heater, at least one temperature sensor II set in pipe exit end, wherein flow sensor and temperature sensor I connected with monitored control system, voltage sensor and temperature sensor II connected with monitored control system, electric heater connected with EPS through monitored control system.

Geothermal ground coils are installed and embedded in fill at the bottom of excavations, made for drainage fields associated with septic and other effluent systems, prior to the addition of the drainage field sanitary fill. This configuration eliminates the need for expensive bore holes and provides a ground heat source that is at a higher temperature than natural ground formations due to the supplemental heat imparted to the ground by the drain field effluent Fouling of the outside heat transfer surfaces of the ground coils is also avoided because of the clarifying and filtering action of the drain field fill. This provides an improved ground source heat pump system wherein the installation costs are reduced arid the capacity and efficiency of the system are improved.

The invention relates to a geothermal heat pump air conditioning system based on independent control of temperature and humidity. The geothermal heat pump air conditioning system comprises an underground buried heat exchanger system, a heat pump unit system, and an air conditioning unit in a floor air conditioning room; the underground buried heat exchanger system is connected with the heat pump unit system by a pipe, and the heat pump unit system is connected with the air conditioning unit by the pipe; an air conditioning freeze water collector and a water divider of the heat pump unit are connected with a cooling coil of the air conditioning unit by the pipe; and a set of runner dehumidification system is arranged at the front of the cooling coil of the air conditioning unit. In the geothermal heat pump air conditioning system, the independent temperature and humidity control is applied to the air conditioning unit, that is, the runner dehumidification system is used for decreasing the air humidity without changing the air temperature, and the cooling coil is used for decreasing the air temperature without changing the air humidity; the independent temperature and humidity control is favorable for controlling the temperature and humidity in the room, and the cooling coil is just responsible for cooling without dehumidifying; therefore, the temperature of the refrigerated water entering the cooling coil is not too low reduces the working burden of the heat pump unit.

A modular water source geothermal heat pump unit is provided. The water source geothermal heat pump unit comprises separate fan, compressor and coil modules. In one embodiment, the compressor module may be located between the fan and coil modules. In another embodiment the water source geothermal heat pump unit may be a monolithic unit that includes a fan that directs air through a chute located adjacent a compressor. The chute may also be located between the fan and a coil.

The invention discloses a compact micro-passage heat exchanger comprising a shell which is respectively provided with an inlet and an outlet of the high-temperature fluid and low-temperature fluid and a micro-passage. The micro-passage is combined into an integral structure by a method that a high-temperature fluid passage, a low-temperature fluid passage and an interlayer between the high-temperature fluid passage and the low-temperature fluid passage are diffused by atoms. Compared with all existing micro-passage heat exchanger, the compact micro-passage heat exchanger has no thermal resistance generated by welding; the hydrodynamic diameter of the micro-passage can be designed freely; and the heat-transmission area in unit volume is more than 700. The micro-passage heat exchanger can be used as condensers, gas coolers or evaporators used by heat pump water heaters, heat pump boilers and geothermal heat pumps, can greatly improve the heat exchanging capability of the heat exchanger in unit volume, and can save the needed materials of the heat exchanger, thus reducing the volume and weight of the heat pump water heaters, heat pump boilers and geothermal heat pumps.

A multi-split air or ground source heat pump system designed to provide a residential application with space heating and cooling, along with supplemental hydronic heating and potable water preheating. The supplemental hydronic heating supports applications like radiant floor heating and heating swimming pools. Commercially, the multi-split air or ground source heat pump system expands on this technology to incorporate comfort and / or process heating, cooling, and hydronic heating applications utilizing multiple types of energy sources.

A computer which functions by a performance prediction program for a ground source heat pump system of the present invention and a performance prediction system constructed thereby include a dimensionless distance calculating means, a first dimensionless time calculating means, a second dimensionless time calculating means, a boundary time acquiring means, an underground temperature change calculating means, and a tube surface temperature change calculating means. The performance prediction program and performance prediction system can be applied to the design of heat exchange system by obtaining predicted underground temperature data for the ground source heat pump system with high accuracy and predicting the performance for the ground source heat pump system based on the resulting underground temperature changes, etc., considering the use of a plurality of buried tubes, underground temperature change patterns for buried tubes placed at different intervals, and the use of U-shaped tube heat exchangers.

A cementitious Grout 111MG, with improved thermal and electrical conductivity over Grout 111, for use in at least one of geothermal heat pump systems and metal electrical grounding rod systems, with improved conductivity achieved by means of substituting metal grit for sand, a cementitious grout where both Grout 111MG and Grout 111 have mix water pH level limitations so as not to be corrosive to metals, a new use for Grout 111 as a fill material surrounding electrical grounding rods for enhanced electrical conductivity over traditional grouts, and a new use where both Grout 111MG and Grout 111 may be utilized to surround at least one of geothermal heat pump sub-surface heat transfer fluid conductive tubing / piping and electrical grounding rods installed within at least one of a well / borehole, a trench, and a pit.

The invention relates to a system with 'a model of south of the Yangtze River' applying the ground source heat pump technology, and a control method thereof. The system comprises a heat pump unit, an indoor air conditioner, a hot water tank, a ground-source-side water divider, a ground-source-side water collector and a cooling tower, and through the connection of pipelines, the heat pump unit and the indoor air conditioner form an air conditioning circulation loop, a heat recovery unit as well as the ground-source-side water divider, the cooling tower and the-ground-source-side water collector form a ground-source-side circulation loop, and the heat pump unit and the hot water tank form a hot water supply loop; and the best model and basic model are selected according to the climatope to achieve the underground heat balance. The invention has the advantages of giving full play to the comprehensive advantages of high efficiency, energy saving, environment protection and multiple functions of the ground source heat pump, and effectively solving the problem of underground heat balance, being in line with the national electricity use policy of load shifting, being new technology actively advocated and promoted in China, not only saving energy, but also saving money when in use.

The invention relates to a solar and ground source heat pump combined energy supply system and an operation control method thereof. The solar and ground source heat pump combined energy supply system is technically characterized by comprising a solar heat collecting system, a ground source heat pump system and a buried pipe system and being composed of plate heat exchangers, a pump set and switches. The operation control method of the solar and ground source heat pump combined energy supply system includes the steps of calculating equipment parameters of the solar and ground source heat pump combined energy supply system to construct the solar and ground source heat pump combined energy supply system, and carrying out operation control over the heat collecting process, the heat storing process and the heat supplementing process of the solar and ground source heat pump combined energy supply system. Hot water supply requiring time periods of domestic hot water requiring users are analyzed, and by controlling relevant switches and equipment, solar energy and a ground source heat pump are combined to supply energy; and heat in a solar heat collector can be conveyed into soil through the buried pipe heat exchanger system to conduct the heat supplementing process on the soil during time periods when the domestic hot water requiring users do not need hot water supply, and thus the soil thermal imbalance problem caused by long-term operation of an existing ground source heat pump is solved.

A geothermal energy resources heat pump system consists of an evaporator, a condenser, a compressor and an expansion valve and they are connected one by one to form a heat-exchanging unit. The evaporator and the condenser are connected with the well-water pipeline separately via the valve set and the indoor circulating water pipeline. In the process of heating in winter and refrigerating in summer switching the valve set separately can make the indoor circulating water and the well water flow through the evaporator or the condenser separately according to the needs.

The invention discloses a ground source heat pump air conditioning / combined refrigeration system, which consists of five subsystems, including a buried pipe heat exchanger system, heat pump air conditioning system, air conditioning terminal system, a cooling system and a heat medium circulation system. The buried pipe heat exchanger system is the major cold / heat source of the ground source heat pump air conditioning; the cooling system adopts the mode of water cooling, the exhaust heat of the cooling system is used as an auxiliary heat source all the year round for the ground source heat pump air conditioning with high heat load, thus a peculiar ground source heat pump air conditioning / combined refrigeration system is achieved, thereby meeting the demands of air conditioning users and cooling system users all the year round and ensuring the performance of the system for long term operation. The buried pipe heat exchanger system is connected with the heat pump air conditioning system and the cooling system via the pipeline of the heat medium circulation system; the heat pump air conditioning system is connected with the air conditioning terminal system via the pipeline of the heat medium circulation system; and the control of cold / heat transfer is controlled through the adjustment of the heat medium circulation system. The invention has high energy-saving performance, the costs are low and the operation is reliable.

The invention relates to a heat pump marsh gas tank, in particular to an air energy, solar energy and ground source heat pump marsh gas tank, which belongs to environment engineering equipment. The heat pump marsh gas tank consists of an anaerobic digestion system, a heat insulation and thermal preservation system, a solar energy hot water system, an air energy heat pump system, a ground source heat pump system and a control system, wherein the tail end heat exchange equipment of the ground source heat pump system, solar energy hot water pipelines and the air energy heat pump system are connected with the heat insulation and thermal preservation system and the anaerobic digestion system through hot water circulation pipes, a hot water transit box arranged in the thermal preservation system is used for regulating and balancing the hot water of heat resource systems, hot water heats the anaerobic digestion tank through circulation pipes for promoting the anaerobic digestion, and the hot water circulation pipes can be arranged inside the anaerobic digestion tank and can also be arranged outside the anaerobic digestion tank. The marsh gas tank can also provide hot water and cold air at the same time of producing marsh gas, and the invention can solve the problems of high production cost, great energy consumption and the like of winter production of the marsh gas engineering, and can be popularized easily.

The invention provides an adaptive heat balance control system of a ground source heat pump. The outlet of a water pipe of indoor heat supply air conditioning equipment is connected with a ground source heat pump indoor circulating pump; the outlet of the ground source heat pump indoor circulating pump is connected with the indoor inlet of a ground source heat pump unit; the indoor outlet of the ground source heat pump unit is connected with the indoor heat supply air conditioning equipment; the indoor inlet of the ground source heat pump set is connected with a ground source heat pump outdoor circulating pump; the outdoor outlet of the ground source heat pump unit is connected with an underground pipe and auxiliary heat exchange equipment which are connected in parallel with each other; the outlets of the underground pipe and the auxiliary heat exchange equipment are communicated with the outdoor inlet of the ground source heat pump unit; the control system further comprises an outdoor wet bulb temperature sensor, an underground pipe in and out water temperature sensor, an underground pipe and water pipe flow meter, and a heat balance adaptive controller which works based on a heat balance control underground pipe loop switching valve and a heat exchange equipment loop switching valve. By the adaptive heat balance control system, the running efficiency of the ground source heat pump system is improved, and the heat balance control effect is enhanced.

The central air conditioning system at terminal of geothermal heat pump radiation includes soil heat exchange liquid circulation system, refrigerant circulation system, primary and secondary air conditioning water circulation system, and fresh air and air exhausting system. In summer, the terminal obtains heat from the air conditioned area and the heat is transferred via the secondary and the primary air conditioning water system to the refrigerant circulation system and further dissipated to soil via the soil heat exchange liquid circulation system. In winter, heat is obtained from soil and transferred to the air conditioned area. In all seasons, the fresh air and air exhausting system improves the air quality in the air conditioned area. The present invention utilizes the geothermal energy and has high efficiency.