1145results about How to "Improve cycle efficiency" patented technology

A heat pump cycle device includes a compressor for drawing and compressing refrigerant, a first high-pressure heat exchanger located for heating a first fluid circulating in a first fluid circuit using high-pressure refrigerant discharged from the compressor, a second high-pressure heat exchanger for heating a second fluid circulating in a second fluid circuit using the high-pressure refrigerant flowing out of the first high-pressure heat exchanger, a first heating heat exchanger located to heat a third fluid using the first fluid, a second heating heat exchanger located to heat the third fluid using the second fluid, a decompression unit located to decompress the high-pressure refrigerant flowing out of the second high-pressure heat exchanger, and a low-pressure heat exchanger for evaporating low-pressure refrigerant decompressed by the decompression unit. Because the first and second high-pressure heat exchangers are located, cycle efficiency can be improved.

A method and system for generating power from low- and mid-temperature heat sources using a zeotropic mixture as a working fluid. The zeotropic mixture working fluid is compressed to pressures above critical and heated to a supercritical state. The zeotropic mixture working fluid is then expanded to extract power. The zeotropic mixture working fluid is then condensed, subcooled, and collected for recirculation and recompression.

Methods of separating fluids using capillary forces and/or improved conditions for are disclosed. The improved methods may include control of the ratio of gas and liquid Reynolds numbers relative to the Suratman number. Also disclosed are wick-containing, laminated devices that are capable of separating fluids.

The invention provides a positive plate of a lithium ion battery. The positive plate comprises a positive current collector and a positive active substance layer, wherein the positive active substance layer is coated on the positive current collector and contains a positive active substance, a conductive agent, a binding agent and a lithium-rich compound, and the lithium-rich compound decomposes to generate lithium ions and release one or more of a gas, conductive carbon and a substance having electrochemical lithium storage activity during formation charging of the lithium ion battery. The generated lithium ions are transferred to a negative electrode from a positive electrode and take participation in reaction with the negative electrode (react with a decomposed product of an electrolyte to form an SEI film at the negative electrode) to supplement to lithium required for forming the SEI film, thus, the lithium ion consumption of the positive active substance can be reduced, and the energy density and the cycle performance of the lithium ion battery are improved. The invention also provides a preparation method for the positive plate of the lithium ion battery, the lithium ion battery applying the positive plate of the lithium ion battery and a preparation method of the lithium ion battery.

By employing command value signals for controlling the opening timing of an exhaust valve or an intake valve and means for measuring flow rates of an intake air of a flow direction which flows through an intake manifold of an internal combustion engine, an air flow rate corresponding to the command value signal is measured. A valve mechanism includes the intake valve and the exhaust valve for each cylinder of the internal combustion engine and is controlled by a valve control means for controlling the valve mechanism. A failure diagnosis of an operating status of the valve mechanism can be performed.

A high efficiency R744 air conditioning and refrigeration system and cycle comprises a vapor compressor and two independent ejectors operatively connected to high and low-pressure sides of the compressor, respectively. The two ejectors reduce the overall pressure ratio of the mechanical vapor compressor resulting in dramatically increased thermodynamic cycle efficiency. As one example of its potential applications for residential, commercial or industrial uses, a 150 ton capacity of a water-cooled chiller designed in accordance with the present invention is predicted to provide the power consumption as low as 0.47 kW/ton, when operated in accordance with the cooling methods of the present invention, which corresponds to 7.47 of Coefficient of Performance (COP).

In a gas turbine bucket having a shank portion and an airfoil portion having leading and trailing edges and pressure and suction sides, an internal cooling circuit, the internal cooling circuit having a serpentine configuration including plural radial outflow passages and plural radial inflow passages, and wherein a coolant inlet passage communicates with a first of the radial outflow passages along the trailing edge, the first radial outflow passage having a plurality of radially extending and radially spaced elongated rib segments extending between and connecting the pressure and suction sides in a middle region of the first passage to prevent ballooning of the pressure and suction sides at the first radial outflow passage.

A non-aqueous electrolyte to be used in a Li-ion battery includes a lithium salt, a cyclic carbonate, a linear carbonate and an isocyanate-based additive, with the following general formula

R¹—N═C═O

wherein R¹ represents linear or branched alkyl groups which have 1 to 7 carbon atoms, or aromatic groups having the following general formula

wherein R² and R³, which may be the same or different and located at any positions of carbons 2, 2′, 3, 3′ and 4 in the benzyl ring, represent hydrogen atoms or halogen atoms, isocyanate groups, either groups, ester groups or alkyl groups, having 1 to 3 carbon atoms, and are optionally substituted with halogen atoms.

In a heat pump type hot water supply apparatus having a compressor (16), an outdoor heat exchanger (22), an expansion valve (24) and at least one indoor heat exchangers, and a water heat exchanger (18) for heat-exchanging refrigerant and water to achieve hot water, the water heat exchanger (18) is equipped in the refrigerant circuit so as to be connected to the outdoor heat exchanger (22) in series in the refrigerant circuit.

A non-aqueous electrolyte secondary battery is produced using a non-aqueous electrolyte including: a non-aqueous solvent that primarily contains a solvent mixture of ethylene carbonate and propylene carbonate and includes a fluorine-substituted ether having a divalent group represented by a formula: —CFX—CH(CH₃)—O—, where X is a hydrogen atom or fluorine atom, in a molecule thereof; and a lithium salt that is dissolved in the non-aqueous solvent. The non-aqueous electrolyte has favorable wettability towards a polyolefin separator, and improves the cycle characteristics and the load characteristics of the non-aqueous electrolyte secondary battery.

An electrical output power generation system is provided. A gas turbine engine rotor spool with at least one alternator rotor and steam turbine rotor are integrated and within a engine body having a combustor or external heat source having fluid communication with the bladed compressor rotor and a gas turbine bladed rotor of the said rotor spool. The alternator rotor has permanent magnets retained and positioned in close proximity and co-axial to the electrical stator having iron laminat and electrical wires. Relative rotational motion between the electrical stator and alternator rotor cause magnetic flux and subsequent electricity to be generated. The steam energy to drive the said rotor spool integrated steam turbine rotor can be from the gas turbine engine exhaust waste heat and or thru external heat energy sources.

The present invention relates to a carbonaceous lithium ion cell negative electrode material with core-shell structure and its preparation method, belonging to the field of carbon material and chemical power supply technology. The described negative electrode material is formed from core portion and shell portion. The core portion is graphite obtained after the graphite intercalation compound is disintercalated, the shell portion is amorphous carbon obtained by pyrolysis of organics. Said invention also provides the concrete steps of its preparation method.

The invention discloses a generating set optimization control method for correcting sliding pressure operation curve by adopting steam consumption rate, which comprises the detailed steps of: confirming the throttling coefficients and minimum pressure of a steam turbine under a designed working condition according to the load command of the generating set and confirming the main steam pressure set value; confirming the parameters of dynamic compensation section according to the main steam pressure response characteristics; respectively calculating the steam consumption rate of the generating set under the designed working condition and the actual working condition, working out the steam consumption rate correction coefficients, and implementing online correction on the load command of the generating set; using the corrected load command to divide the throttling coefficients of the steam turbine, then implementing calculation on the dynamic compensation procedure and minimum pressure limitation, and finally obtaining the best main steam pressure set value of the generating set under the current operation condition. The best main steam pressure set value is applied in a cooperation control system of a unit set so as to realize the best cooperation relation between the inlet steam pressure and inlet steam flow of the generating set, thus reducing the throttling loss of the steam turbine and guaranteeing the best thermoeconomic performance of the generating set.

The invention discloses a reheated gas temperature optimization control method based on multi-variable predictive control. According to the method, the whole hot steam temperature system is regarded as a two-in one-out multi-variable object, and the flow rate of reheated de-superheating jet water and the opening of a flue gas baffle plate are simultaneously controlled by adopting a multi-variable predictive control method; moreover, optimization of economical efficiency of the system is realized by adding a steady state target value of the opening of a reheated de-superheating jet water adjusting valve into optimization indexes of the conventional predictive control. By adopting the multi-variable predictive control method, coordination of side adjustment of flue gas and side adjustment of steam can be better realized, and the dynamic adjusting quality of the reheated steam temperature is further improved; and meanwhile, by adding the steady state target value of the de-superheating water adjusting valve into the conventional predictive control performance indexes, optimization of the de-superheating water jet quantity is realized, so that the circulating efficiency of a unit can be effectively improved.