1893 results about "Chilled water" patented technology

This invention relates to an energy-saving central air conditioning system, which comprises cold and hot water source host, terminal device and the control system to adjust and monitor. The said control system processes according to the large amount of data collected to get the needed optimized status operation orders. It real-time adjusts the each part load of the system into cold storage or cold discharging modes and the said host works under the mode of cold storage and stops working in cold discharging mode.

The invention discloses a cold source centralized digital control method based on energy consumption monitoring. The cold source centralized digital control method based on energy consumption monitoring comprises the following steps that a, real-time monitoring is conducted on power utilization, water utilization, the cooling quantity, the temperature, the pressure and the equipment state of a cold source system of a central air conditioner; b, energy consumption data and system state data collected in the step a are summarized, real-time refrigerating efficiency of the cold source system is calculated according to operating power parameters of a water chilling unit, a chilled water pump, a cooling water pump and a cooling tower fan in the system and the refrigerating capacity of the water chilling unit, forecast energy consumption data at present are obtained through forecasting according to outdoor temperature and humidity parameters at present, indoor temperature and humidity parameters at present and a load forecast model, the forecast energy consumption data and the energy consumption data which are actually monitored are compared, problems existing in the use process of a refrigerating system are found, and an optimized operation control strategy of the cold source system is formed; c, the optimized operation control strategy formed in the step b is conducted, and optimized operation control is achieved through a direct digital controller and an electrically operated valve connected with the direct digital controller.

A movable data center is disclosed that comprises a movable enclosure having partitions that define a closed-loop air flow path. A plurality of fans and a plurality of data processing modules are disposed in the air flow path. A pipe network is disposed within the enclosure that includes a chilled water supply pipe that receives chilled water from a source of chilled water. A water return pipe is provided that circulates water back to the source of chilled water. A plurality of heat exchange modules is installed in the enclosure in the air flow path. The heat exchange modules receive the chilled water from the chilled water supply pipe. Each of the heat exchange modules has a water circulation tube that connects the chilled water supply pipe to the return water pipe.

A system and apparatus is provided that maximizes mass and energy conversion efficiencies in an integrated thermochemical process for the conversion of fossil fuel or renewable biomass to synthesis gas. The system combines gasification, catalytic conversion of gas to liquid, electricity generation, steam and chilled water generation with a system controller to maximize the conversion efficiency from syngas to merchantable products over the efficiency of syngas alone burned as a fuel. A clean synthesis gas stream is introduced into a catalytic reactor that utilizes specially formulated catalysts to generate liquid fuel from CO and H₂ while concentrating CH₄ and other combustible, but non-reactive gases in the syngas product stream. The methane rich stream is introduced into an engine for the production of electricity and heat while the unreacted CO and H₂ can be recycled to produce additional liquid fuel. Excess heat can be used for other co-located processes and facilities.

The invention discloses a linkage energy-saving control system for an air conditioning system. An air and water linkage intelligent controller automatically adjusts an air and water linkage energy-saving control device according to working condition parameters. A cooling water pump and chilled water pump intelligent controller automatically adjusts the operation frequencies and the numbers of cooling water pumps and chilled water pumps according to the working condition parameters. A cooling tower and refrigerating host intelligent controller automatically adjusts the number of operated cooling tower draught fans and operated refrigerating hosts according to the working condition parameters. An air conditioner tail-end intelligent controller adjusts the opening degrees of air supply branch pipe tail-end air valves and chilled water proportion regulating valves and the operation frequencies of air feeders respectively through an air supply branch pipe tail-end air valve, chilled water proportion regulating valve and air feeder energy-saving controller according to the working condition parameters. The invention further discloses a linkage energy-saving control method for the air conditioning system. The linkage energy-saving control system is automatically matched with the energy-saving working condition parameters according with the current system, electric equipment and the controllers in the air conditioning system are adjusted, the air conditioning system runs at the best efficiency, and the purpose of reducing the total energy consumption of the system is achieved.

A chiller plant which produces chilled water for airconditioning, or an industrial process and which is comprised of chillers, cooling fluid pumps, and cooling towers with electrical motor drives uses a substantial amount of energy. A method that coordinates the operation of the cooling tower, cooling fluid pumps, and refrigeration machines so that the chiller plant operates at a higher overall efficiency thus reducing the power usage has been developed and is presented herein. The flow rate of the cooling fluid pumps are controlled to maintain a precise temperature difference across the refrigerant condenser. The cooling tower fans are controlled by comparing the cooling fluid temperature and the cooling fluid flow rate to selected design parameters. The heat rejection rate is measured for each chiller in the chiller plant and operating set points are established for each operating chiller to provide the optimum operation for best energy efficiency.

The invention provides a central air-conditioner chilled water control method based on dynamic responses to tail-end total load changes. A system tail-end total load Q is obtained through the real-time statistics of a load of each piece of tail-end equipment; meanwhile, a chilled water supply temperature Tg, a chilled water return temperature Th and a water collector/separator pressure difference DeltaP are collected; the intelligent control that the cooling capacity of a chilling station is matched with the tail-end loads is realized by the system according to Q, Tg, Th and DeltaP in a control way of combining feedback control and feedforward control. According to the method, the feedforward control guarantees the rapidness of the system, and the feedback control guarantees the accuracy of the system; when the two are combined, the demand of the chilling station on timely and accurate response to the tail-end loads is realized; and therefore, the refrigeration performance of the tail-end equipment is guaranteed.

Embodiments of the present invention include a cooling system and method for cooling a computer rack by circulating liquid coolant through different sections of a rack heat exchanger under separately controlled flow and temperature conditions. In a method according to one embodiment, a first liquid coolant is supplied to a first section of an air-to-liquid heat exchanger. A second liquid coolant is supplied to a second section of the air-to-liquid heat exchanger at a different temperature than the first liquid coolant. Airflow is generated through rack-mounted computer components to the first and second sections of the air-to-liquid heat exchanger. The flow rates of the first and second liquid coolants are independently controlled to enforce a target cooling parameter. The independent operation of the first and second fin tube sections allows for the increased use of un-chilled water without sacrificing heat removal objectives.

The present invention related to cooling systems. More specifically, the present invention relates to a system for cooling one or more parts of a building and or processes comprising a compressor, a condenser having an inlet and an outlet and a plurality of condenser cooling fans, a receiver, a liquid refrigerant pump, an expansion device, an evaporator, the evaporator being surrounded by a chiller barrel having a cooled water return and a chilled water supply line, and refrigerant line means interconnecting the compressor, condenser, expansion device and evaporator in series, in a closed loop for circulating refrigerant therethrough; means for switching the cooling system between free cooling and mechanical cooling and means for actively floating the head pressure in both mechanical and free cooling modes.

The invention provides a group control method for a central air conditioning refrigerating unit. The group control method for the central air conditioning refrigerating unit comprises step A, entering into a step B when the water outlet temperature of a refrigerating unit basically achieves a stable temperature; step B, measuring the temperature and flow amount for water supply and water return of chilled water to obtain temperature difference and the flow amount of the water supply and the water return; step C, computing the load according to the temperature difference and the flow amount of the water supply and the water return; step D, controlling loading and unloading of refrigerating machines of the refrigerating unit. According to the group control method for the central air conditioning refrigerating unit, the group control algorithm for the refrigerating unit is achieved through thermal, the refrigerating unit is operated under an economical and energy saving state and the purposes of prolonging the service life of the device and reducing the energy consumption are achieved. The group control method for the central air conditioning refrigerating unit has a good popularization prospect in the fields of building automatic control and building energy saving.

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 an air treatment device and an air treatment method. The air treatment device is characterized by comprising an air treatment part and a control and regulation part, wherein the air treatment part comprises a return air inlet (1) for receiving indoor return air, a return air regulating air valve (2), a fresh air port (3) for receiving indoor fresh air, a fresh air regulating air valve (4), a high-temperature meter cooler (5) communicated with high-temperature chilled water, a low-temperature meter cooler (7) communicated with low-temperature chilled water, a bypass regulating air valve (9), a heater (10), a humidifier (11), a fan (12) for supplying air to an indoor space, and an air outlet (13) for supplying air to the indoor space, wherein the high-temperature meter cooler (5) and the low-temperature meter cooler (7) which are connected in turn are arranged in a flow direction of the air entering the air treatment device and flowing out of the air treatment device. The evaporating temperature of a water chiller is improved, and the energy efficiency of an air-conditioning system is improved.

A coolant recovery system for reducing coolant loss within thermal management systems. The coolant recovery system includes a thermal management unit having a spray chamber and a coolant recovery chamber, a first cooling coil within the coolant recovery chamber, and a chilled water supply fluidly connected to the first cooling coil. The coolant is sprayed upon the electronic device within the spray chamber and then is collected into the coolant recovery chamber for thermal conditioning. A removable chamber may be removably positioned within the spray chamber. In an alternative embodiment, a central unit may be connected to a plurality of thermal management units.

By supplying a refrigerant utilized for cooling brine at a brine chiller unit (4) to a cooler (21) of a blast chiller (2), the internal space at the blast chiller (2) is cooled. In addition, the brine cooled at the brine chiller unit (4) is supplied to an ice heat storage tank (23) during the night and is supplied to a cold trap (7) during the daytime by switching a three way reversing valve (17). Thus, ice-making and chilled water storage are achieved at the ice heat storage tank (23) during the nighttime so that a tumble chiller (3) performs cooling during the daytime by using the chilled water that has been stored at the ice heat storage tank (23). Consequently, during the daytime, three coolers, i.e., the vacuum cooler (1), the blast chiller (2) and the tumble chiller (3), can be operated with a single brine chiller unit (4).

A refrigerant compressor (10) for use in a chiller-heater system that can provide chilled water at less than 10° C. and hot water at more than 80° C. without the need for additional heat input, the compressor (10) being configured to provide a compression ratio of at least 18:1 and a temperature lift across the compressor of at least 80K, and the refrigerant fluid being selected to give the desired temperature lift without the pressure at the compressor outlet exceeding 25 bar.

A combination water cooler and refrigerator unit is provided including a lower cabinet defining a refrigerated compartment, and an upper water reservoir for receiving a supply of water from a water source, such as an inverted water bottle. A refrigeration system mounted within the cabinet includes a chiller coil having a first segment for chilling the refrigerated compartment, and a second segment for chilling water within the water reservoir. In addition, a lower end of the water reservoir is positioned in heat transfer relation with an upper region of the refrigerated compartment, and a single thermostatic temperature control sensor is mounted within the refrigerated compartment for regulating the refrigeration system for substantially eliminating risk of reservoir or refrigerator freeze up.

The invention discloses a communication machine room cooling system which comprises an internal circulation cooling medium providing loop, a medium natural cooling loop and a central temperature control unit, wherein the internal circulation cooling medium providing loop comprises an internal circulation duct, a chilled water cooling heat exchanger, more than one partial hot position gas-liquid heat exchanger, an internal circulation water pump and a natural cooling heat exchanger; the chilled water cooling heat exchanger is connected with a chilled water duct and exchanges heat through an automatic regulating valve; the partial hot position gas-liquid heat exchanger is arranged at the hot air outlet of each electronic device; the internal circulation cooling medium providing loop exchanges heat with the medium natural cooling loop through the natural cooling heat exchanger; the medium natural cooling loop comprises an external circulation duct, an external natural cooling device, an external circulation water pump and an automatic regulating valve; and the central temperature control unit is connected with temperature sensors and regulating valves.

The invention relates to a multi-compressor air conditioner control method which comprises the following steps: a, judging whether the absolute value of difference between the first temperature measured by a temperature sensor and the set temperature set by a temperature setting unit exceeds a first threshold, and if the absolute value exceeds the first threshold, executing step b; b, starting one compressor and accumulating the operation time of the compressor; judging whether the absolute value of difference between the second temperature measured by the temperature sensor and the set temperature set by the temperature setting unit exceeds a second threshold, and if the absolute value exceeds the second threshold, executing step c, wherein the second threshold is greater than the first threshold; and c, starting another compressor and accumulating the operation time of the compressor. The invention also relates to a corresponding control system. According to the invention, the working states of multiple compressors are adjusted by detecting the backwater temperature of chilled water in real time, thus the service life of equipment is prolonged on the basis of maintaining the reliable work of the system.

There is disclosed a water treatment appliance, particularly for on-the-counter treatment of potable water. The appliance comprises: a base unit comprising a pump, a housing and a cooling unit for chilling water in the housing; a removable water reservoir engageable with the housing; a control panel comprising a water dispensing switch; an outlet for dispensing treated water from the fluid treatment system; and a treatment cartridge removably disposed in the housing. The treatment cartridge comprises a first chamber and a second chamber in communication with one another. The first chamber is in communication with the housing and has disposed therein a filter element. The second chamber is in communication with the outlet and has disposed therein an ultraviolet radiation lamp.

A cooling container comprises a container housing with a chilled water storage tank including a first interface for receiving chilled water. The chilled water tank has a plurality of straight pipes joined by elbows connections to provide a folded path, the full path length being greater than the length of the container housing, and a second interface for outputting the chilled water. A number of interfaces within the container housing are configured to receive a chiller module or a free cool unit.

The invention provides an executive capability adjustment method and device of a water chilling unit. The executive capability adjustment method includes the steps that outlet chilled water temperature of the water chilling unit during starting is obtained; the difference value of the outlet chilled water temperature and a preset target value is determined; the target value is adjusted according to the difference value, and the frequency loading speed is determined according to the adjusted target value; and the executive capability of the water chilling unit is adjusted according to the frequency loading speed. According to the executive capability adjustment method and device of the water chilling unit, the technical problem in the prior art that adjustment is carried out at the same frequency loading speed, so that excessive loading and unloading of the unit are caused is solved, and therefore the needed time from starting to stabilization is effectively shortened, and the purpose of stable and fast starting of the unit is realized.

The invention discloses a central air-conditioning energy-saving control system and a control strategy thereof. The control system comprises a room load analysis module, an air volume control module, a chilled water flow control module, a cooling water flow control module, a cooling tower control module, an indoor temperature sensor group, a chilled water temperature sensor group, a cooling water temperature sensor group, an outdoor temperature/humidity sensor, a chilled water system terminal device, a cooling water system terminal device, an air system terminal device, connecting devices between various devices and a control cabinet for storing various data processing control modules. The control strategy directly directs regulation and control of the system according to room load change, involving calculating room load fluctuation according to room temperature change and converting the room load fluctuation into a real-time air volume regulating variable, a real-time chilled water flow regulating variable and a real-time cooling water flow adjusting variable. A water supply/return temperature distance control mode is a monitoring way for maintaining normal operation of the system. The system of the present invention is compact in structure, high in automation degree, high in intelligence degree, and stable and reliable in operation.

The invention discloses a low-temperature air-cooled water chiller unit and a control method thereof. The low-temperature air-cooled water chiller unit comprises an electric cabinet for control operations of the unit, a compressor for compressing refrigerant, a condenser exchanging heat with the ambient temperature, a fan for accelerating heat dissipation of the condenser, an expansion valve for reducing the pressure of the refrigerant and throttling the refrigerant, and an evaporator for preparing chilled water. A pressure maintaining valve for rapidly establishing pressure difference is arranged between the outlet end of the compressor and the inlet end of the condenser, and a secondary oil separator is arranged between the inlet end of the pressure maintaining valve and the outlet end of the compressor. By means of the technical scheme above, the low-temperature air-cooled water chiller unit overcomes the problems that, at low temperatures, the unit cannot start, the compressor cannot rapidly establish the pressure difference and is difficult to return oil and the like; meanwhile, the low-temperature air-cooled water chiller unit can continuously perform refrigeration at a low temperature of minus 40 DEG C to provide sufficient circulating cooling water for nuclear power equipment and further ensure normal and safe operation of the nuclear power equipment.