114 results about "Carnot cycle" patented technology

Engine embodiments primarily designed for aircraft propulsion and power generation incorporating the Carnot cycle for efficient combustion with typical embodiments including air compressors having one or more stages with isothermal compression and including combustion and expansion chambers having in part isothermal expansion before final adiabatic expansion.

The steam compressing refrigeration cycle device includes main cycle system comprising booster pump, condensator, expansion motor, evaporator and compressor connected successively with pipeline to output cold; and secondary cycle system comprising throttle connected across the inlet of the booster pump and the outlet of the condensator as well as the booster pump and the condensator, to further lower the temperature of the work medium in the outlet of the compressor. The expansion motor has its output torque rotating the booster pump and has isoentropic expansion to reduce the entropy of the work medium entering the condensator. The booster pump reduces the operation pressure difference and the power consumption of the compressor. Therefore, the present invention has energy efficiency near ideal inverse Carnot cycle and low hot load one compressor, and may be used widely in refrigeration cycle in air conditioner, refrigerator, etc.

The invention discloses a double-crankshaft-contained variable-compression-ratio Atkinson-cycle internal-combustion engine mechanism, which is an internal-combustion engine technology and is used for improving the usability of an Atkinson-cycle internal-combustion engine and improving the thermal efficiency of the internal-combustion engine to enable the thermal efficiency to be approximate to the highest theoretical efficiency of a Carnot cycle. The mechanism comprises a rocking arm, a second crankshaft, a connecting rod of the second crankshaft, a driving chain, a phase regulator and a derived three-crankshaft Atkinson internal-combustion engine mechanism, wherein the rocking arm is used for connecting a piston connecting rod and a connecting rod of a first crankshaft; the second crankshaft and the connecting rod of the second crankshaft are used for driving the rocking arm to make periodic motion; the driving chain is used for connecting gears on the first crankshaft and the second crankshaft; the gear ratio of the gear for the first crankshaft to the gear for the second crankshaft is 1:2; and the phase regulator is used for regulating the rotary phase relation between the first crankshaft and the second crankshaft. Through the double-crankshaft-contained variable-compression-ratio Atkinson-cycle internal-combustion engine mechanism, the fuel efficiency of a naturally-aspirated internal-combustion engine can be effectively improved, and meanwhile, the double-crankshaft-contained variable-compression-ratio Atkinson-cycle internal-combustion engine mechanism has the actions of additionally regulating the compression ratio and changing the discharging quantity within a small range.

An object is to sequentially calculate planned COPs. Provided is a performance evaluation device for a variable-speed centrifugal chiller that includes a data acquisition unit that acquires operating data of the variable-speed centrifugal chiller as input data; a storage unit that stores a first arithmetic equation derived on the basis of mechanical characteristics of the chiller and used for calculating a relative load factor that relatively expresses a relationship between a current load factor at a current coolant inlet temperature and a predetermined load factor at a predetermined coolant inlet temperature set as a reference operating point, a second arithmetic equation that expresses a relationship between the relative load factor and a correction coefficient, and a third arithmetic equation used for calculating a planned COP by using the correction coefficient to correct a COP calculation equation derived from a reverse Carnot cycle; and an arithmetic unit that calculates the planned COP under current operating conditions by using the operating data acquired by the data acquisition unit in the first, second, and third arithmetic equations stored in the storage unit.

The invention discloses a multi-purpose heat pump unit, which configures a heat pump unit providing hot water and floor heating, or configures a two-in-one heat pump unit providing air-conditioning refrigeration and floor heating, or configures a three-in-one heat pump unit which can provide hot water, air-conditioning refrigeration, and floor heating together. The heat pump unit is formed through adding one or two heat exchangers to the heat pump air conditioning unit, and through the carnot circulation or reverse carnot circulation, or through the switch of the control valve, in reverse carnot circulation and conversions between the carnot circulation, and through utilizing the process of heat release and absorption of the high-pressure and high-temperature refrigerant in the compressor. The multi-purpose heat pump unit has advantages of saving equipment investment, improving the efficiency of energy utilization, and reducing the cost and reducing the environmental pollution.

The invention discloses a nano-liquid electrostatic atomization and thermoelectric heat pipe integrated trace lubrication grinding device which comprises a grinding wheel with heat pipes and an electrostatic atomization combined spray nozzle in thermoelectric refrigeration and magnetic enhancement electric fields. Thermoelectric film materials cover the surfaces of two sides of the grinding wheel with the heat pipes, and extra electric fields are applied to the outsides of the thermoelectric film materials; a high-voltage direct-current electrostatic generator and a magnetic field forming device are arranged on the outside of the electrostatic atomization combined spray nozzle; the electrostatic atomization combined spray nozzle is connected with a nano-particle liquid supply system and a gas supply system; nano-liquid is subjected to electrostatic atomization and is sprayed to grinding zones by the electrostatic atomization combined spray nozzle, and heat in the grinding zones can be absorbed; the heat can be absorbed by the thermoelectric film materials in the grinding zones under thermoelectric effects, and absorbed heat can be dissipated by the grinding wheel with the heat pipes after the thermoelectric film materials are separated from the grinding zones, so that a Carnot cycle can be formed. The nano-liquid electrostatic atomization and thermoelectric heat pipe integrated trace lubrication grinding device has the advantages that nano-liquid electrostatic atomization and thermoelectric refrigeration and heat pipe refrigeration technologies are integrated with one another, accordingly, a large quantity of grinding heat can be absorbed after the nano-liquid electrostatic atomization and thermoelectric heat pipe integrated trace lubrication grinding device reaches the grinding zones, the grinding temperatures can be reduced, and obvious refrigeration effects can be realized for the grinding zones.

The invention relates to the field of materials and energy and the field of environment protection. Based on an artificial simulated forest microclimate system, the fresh air system is achieved through Carnot cycle under air conditioner application, and the fresh air system is a mode for replacing fresh air. In severe outdoor air or a closed space, the comfort level of the air conditioner environment meeting the ASHRAE standards is achieved, meanwhile, separate control over temperature and humidity is achieved, air is washed with cold water, pollutants including carbon dioxide, VOC, methanol, peculiar smell, air dust and microorganisms to which the dust is attached in the room are removed, the scheme for removing the pollutants through fresh air ventilation is replaced, and indoor air sterilization is achieved.

The invention discloses a quick water heating device for a heat pump, which comprises a Carnot cycle system. The quick water heating device for the heat pump further comprises a water storage tank, and a water pipe arranged outside the water storage tank; the bottom of the water storage tank is provided with a water intake; the top of the water storage tank is provided with a circulating water outlet; the circulating water outlet is connected with a water inlet of the water pipe; a water outlet of the water pipe is connected with the water intake of the water storage tank via a circulating water pump and a check valve in sequence; a pipeline between the water outlet of the water pipe and the circulating water pump is provided with a water outlet for bath; and the water pipe is arranged side by side with a refrigerant pipe in the Carnot cycle system to form a heat exchanger. By means of the quick water heating device for the heat pump, disclosed by the invention, the water can be pre-heated and heated quickly, and the service life of the equipment can be prolonged.

The invention belongs to the field of energy source application and mainly relates to a Rankine cycle power generation system capable of realizing efficient utilization of heat energy. The system is the Rankine cycle power generation system with a reversible Carnot cycle subsystem, namely a heat regenerator is additionally arranged between a Rankine cycle working medium pump and a steam generator, and one reversible Carnot cycle system is composed of the Rankine cycle power generation system, the heat regenerator, a compressor, an expansion valve and a condenser by a heat regeneration medium and a pipeline; the reversible Carnot cycle system has the function of conveying a lot of the heat energy, which is brought away by a cooling medium in the condenser, is discharged and is absorbed by the system in a current Rankine cycle, back to the working medium of the Rankine cycle by the heat regeneration medium, so that the thermoelectric conversion rate is extremely improved.

The invention discloses a multi-energy complemented hybrid power generation system of a wind, light and proton exchange membrane fuel battery, and a method. A power generation proportion of solar energy and wind power is continuously increased; a situation of wind and light abandoning is very rigorous; the reliability, a performance index and a life cycle of a proton exchange membrane fuel battery are greatly improved along with technical breakthrough; and a commercial operation stage is entered. Abandoned wind and abandoned light energy sources are comprehensively utilized by the proton exchange membrane fuel battery; water is electrolyzed by surplus power generated by a photovoltaic array and a wind power generator to generate hydrogen and oxygen; an electrochemical reaction is performed in the proton exchange membrane fuel battery; chemical energy of fuel is directly converted into electric energy; heat engine carnot cycling is not required; a reaction product is the water; and the clean and environment-friendly multi-energy complemented hybrid power generation system of the wind, light and proton exchange membrane fuel battery is formed.

A minimal quantity lubrication grinding device including: heat pipe grinding wheel covered with electrocaloric film material on both side surfaces, wherein external electric field is applied to outside of the electrocaloric film material; and electrostatic atomization combined nozzle provided with high-voltage DC electrostatic generator and magnetic field forming device at the outside and in an electrocaloric refrigeration and magnetically enhanced electric field; electrostatic atomization combined nozzle is respectively connected with nanoparticle liquid and gas supply system; and nanofluid is electrostatically atomized by electrostatic atomization combined nozzle and is jet to grinding area to absorb heat of grinding area; electrocaloric film material absorbs heat in grinding area through electrocaloric effect and disperses absorbed heat through heat pipe grinding wheel after leaving grinding area to form a Carnot cycle. Nanofluid electrostatic atomization is integrated with electrocaloric refrigeration and heat pipe.

The invention discloses a solar energy secondary heat-source tower heat pump integrated device. The integrated device consists of a close-type working medium cold- and heat-source tower, a heat pump reverse Carnot cycle system, and a humid heat-source condensation water separator. The device is particularly suitable for household air conditioners under high-temperature and high-humidity environment in summer and under low-temperature and high-humidity environment in winter; and the device is a high-efficiency negative pressure evaporation water chiller in summer and is an effective frost-less air-source heat pump in winter so as to realize energy supply for heat transmission of small temperature difference from air, and triple cogeneration of hot air-conditioning, cold air-conditioning and hot water without boilers, electric auxiliary terminals or carbon emission, of the household air conditioners.

The invention discloses a cooling method of a pure water circulation system for wind generation and a cooling system implementing the method. In the cooling method, an assistant water circulation system is adopted as an intermediate medium to carry out the heat of the pure water circulation system and forcibly cool the heat; and the cooling system is designed for implementing the method, comprises a pure water circulation system and a reverse Carnot cycle cooler system, and performs indirect temperature control and refrigeration on the pure water circulation system by taking the assistant water circulation system as the intermediate heat transfer medium. In the cooling method disclosed by the invention, the adaptability of the wind generation system is remarkably extended and the method is applicable to various wind generation occasions; and the cooling system has the advantages of compact structure and low cost, can forcibly cool the circulating water without condensation in the case of relatively low temperature difference between water and environment, and is used for cooling the circulating water in wind generation.

The invention discloses a closed nano-fluid haze absorption heating machine which comprises a purifying and heating integrated machine frame structure, a static haze absorption freezing and defogging system, a wet-cold heat source absorption circulating system, a Carnot cycle low-temperature increasing system and a sleeve energy storage heating and haze removing system. The closed nano-fluid haze absorption heating machine is characterized in that wet-cold heat source air with haze is driven to enter the static haze absorption freezing and defogging system in a circulating manner, the haze is removed, sterilization and dehumidification are realized, a wet-cold heat source with the haze is taken by the wet-cold heat source absorption circulating system and improved into high-temperature heat energy, small boiler heating is replaced and the periodic internal hot fluid frost haze removing process for more than 12 hours under the condition of environmental negative temperature is realized by the sleeve energy storage heating and haze removing system, and the closed nano-fluid haze absorption heating machine is economical and environmentally friendly, replaces fossil energy, decreases haze condensation nucleuses and is widely applicable to pollution-free heating for Chinese small and medium towns.

The invention provides a high-efficient refrigerating air-conditioner and relates to the aspect of the improvement for the energy consumption of a traditional refrigerating air-conditioner. By adopting the high-efficient refrigerating air-conditioner, the energy waste of the traditional refrigerating air-conditioner during a working process of a condenser is eliminated and the heat at one end of the condenser of the traditional refrigerating air-conditioner is utilized to refrigerate again. A double unit composed of a Carnot cycle unit and a lithium bromide unit is adopted; the condenser of the Carnot cycle unit is coupled with a generator of the lithium bromide unit in a linking or other combining mode, so that the heat of the condenser is transferred to the generator for driving the lithium bromide unit to run; the defect of the traditional air-conditioner that heat is radiated and wasted at one end of the condenser is overcome; the heat energy is utilized to refrigerate, so that the refrigerating efficiency is increased; the coefficient of performance (COP) reaches or exceeds 8.5; energy is saved and heat island effect is relieved; and the high-efficient refrigerating air-conditioner is suitable for air refrigeration of big, medium/small-size leisure and recreation places and offices.

The invention relates to a refrigeration system. The refrigeration system comprises an evaporator, a condenser, a compressor and a U-shaped tube or a straight tube, wherein the mounting position of the condenser is higher than that of the evaporator; and the height H of the U-shaped tube or the depth H that the straight tube is inserted below the liquid level of a refrigerant in the evaporator accords with a formula of rho gH>p2-p1, wherein rho is the density of the refrigerant. For a condition that indoor temperature T1 is lower than outdoor temperature T2, the refrigeration system adopts Carnot reverse cycle; and for a condition that the indoor temperature T1 is higher than the outdoor temperature T2, the refrigeration system adopts Carnot cycle, p2<p1, at the moment, refrigerant steam pushes the compressor to idle, and the refrigerant in the U-shaped tube or the straight pipe completes constant entropy compression by means of self gravity without energy consumption, so that the energy consumption of the system is extremely low. The refrigeration system can use other liquid with the boiling point between 20 and 100 DEG C, such as methanol, ethanol and the like as the refrigerant.

Design COP is iteratively computed. Provided is a centrifugal chiller performance evaluation system including a data acquisition section for acquiring operating data from a centrifugal chiller as input data; a storage section storing a design COP estimation formula obtained by adding correction values corresponding to losses occurring in an actual environment to a computational formula for ideal actual-machine COP expressed using COP characteristics of a reverse Carnot cycle; and a computing section for estimating a design COP at a current operating point using the operating data acquired by the data acquisition section and the design COP estimation formula stored in the storage section. The correction values include a first correction value calculated from a first computational formula including the load factor of the centrifugal chiller as a variable and a second correction value calculated from a second computational formula including a difference between cooling water outlet temperature and chilled water outlet temperature as a variable. The second correction value contains an offset from the first correction value depending on cooling water inlet temperature.

The invention relates to a method for cooling a heating element and recovering the energy of the heating element. According to the method, a thermoelectric material or a thermoelectric device on the surface of the heating element is used as a working substance, the temperature difference of the heating element and the environment is used to generate power and do work, the heat is absorbed from the heating element and is released to the surrounding environment through Carnot cycle, a voltage stabilizing module is connected to charge a power supply, so that the purposes of reducing the temperature of the heating element and recovering the energy of the heating element are fulfilled. The heating element is actively cooled without consuming electric power, the heat energy is converted to the electric power to charge the power supply in the cooling process, and the energy is recovered.

The invention provides Carnot-Rankine dual-cycle hybrid efficient power generating equipment. The power generating equipment comprises a Rankine cycle circuit and a Carnot cycle circuit, wherein the Rankine cycle circuit comprises a water feed pump, a high-pressure steam boiler, a heat-work power conversion machine, a condenser and a gas-liquid separator which are sequentially connected into a ring; the Carnot cycle circuit comprises a group of compressors which are connected in series sequentially and a heat exchanger, and a cooler is arranged between every two compressors; and an inlet of the group of compressors is connected with a gas outlet of the gas-liquid separator, and an outlet of the heat exchanger is arranged between the high-pressure steam boiler and the heat-work power conversion machine. According to the equipment, the Rankine cycle and the Carnot cycle are directly combined, and the low-efficiency Rankine cycle is improved by using the advantage of high efficiency of the Carnot cycle, so that the heat efficiency of the Rankine cycle is increased substantially.