30results about How to "Reduce mass flow rate" patented technology

A steam-generating combustion system includes an oxygen enriched gas provided as at least part of an oxidant stream. A combustion chamber receives and combusts a fuel in the oxidant stream and generate steam. The combustion chamber generates flue gas having a flue gas volume which is smaller than a volume of flue gas generated by the combustion chamber when operated with air as the oxidant stream. A flue gas pollutant control system receives the flue gas from the combustion chamber and reduces at least one of particulate matter, SO_x, NO_x, and mercury. The reduction in flue gas volume allows the implementation of much smaller pollutant control equipment, since the size of the pollutant control units is mainly based on the volume or mass flow rate of flue gas to be treated. Moreover, the system including oxygen-enriched gas in the oxidant will lead to concentrated levels of the pollutants in the flue gas. The high concentrations of pollutants will enhance their absorption in the different pollutant control systems, improving removal efficiency for all species.

The invention disclosed herein provides a subsonic wind tunnel capable for accurately maintaining a desired Mach number, pressure and temperature for use in aerothermal testing of materials. The invention allows the Mach number to be precisely controlled in the test section of the wind tunnel by employing a restricted outlet acting as a sonic throat for the wind tunnel. In the preferred embodiment, the restricted outlet is constructed to be variable in cross sectional area allowing a range of Mach numbers to be tested. The variable outlet is varied during the operation of the wind tunnel so that an actual trajectory with changing Mach numbers, pressure, and temperature is simulated.

A method for coordinating control of exhaust gas recirculation (18) in a turbocharged internal combustion engine (10) with control of engine boost. When actual boost deviates from a desired boost set-point developed by a boost control strategy (32), such as during a sudden acceleration or deceleration, the EGR control strategy (34) provides a prompt adjustment of exhaust gas recirculation (EGR) seeking to null out the boost disparity.

A transcritical refrigeration system includes a compressor, a gas cooler, an expansion device, and an evaporator. Refrigerant is circulated though the closed circuit system. Preferably, carbon dioxide is used as the refrigerant. A variable speed drive controls the speed of the refrigerant flowing through the compressor. Varying the speed of the refrigerant flowing through the compressor changes the mass flow rate of the refrigerant in the system to optimize the coefficient of performance.

The subject invention pertains to a method and apparatus for an orientation independent compressor. The subject compressor can be part of a vapor compression cycle system, and can use one or more of a variety of working fluids, including, but not limited to, refrigerants such as r-134a, r-22, CO₂, and NH₃. Embodiments of the compressor can utilize positive displacement means to compress the vapor. In a specific embodiment, the compressor can incorporate an oil-lubricated rotary lobed type positive displacement compressor. In a further specific embodiment, the working fluid can be a refrigerant, such as r-134a, incorporating entrained oil, such as miscible lubricating oils. An example of such a miscible lubricating oil that can be used is polyester (POE) oil.

An impact mill (10) has an inlet (12) for material to enter the mill, an impact mechanism (16, 50) arranged to rotate about a rotation axis and being operable to pulverise the material after entering through the inlet, and an outlet (154) for discharge of pulverised material. Blockage sensors (Bj), vibration sensors V, torque sensors Tn, temperature sensors and proximity sensors may be selectively incorporated into the mill.

The proposed invention relates to a gas/liquid contacting vessel (100) for treatment of a gas stream at varying mass flow rates, said vessel comprising at least two distinct gas/liquid contacting compartments (101a, 101b) separated from each other by a substantially vertical partition (102), each compartment having a gas inlet (104a, 104b) and a liquid outlet (110a, 110b) near a bottom end thereof and a gas outlet (106a, 106b) and a liquid inlet (108a, 108b) near a top end thereof, and a mass transfer device (111a, 111b) arranged between said bottom end and top end, wherein one of said compartments is operable for gas/liquid contacting independently of another of said compartments. The proposed invention further relates to a flue gas treatment system for removal of carbon dioxide (CO2) from a flue gas using a liquid absorbent and to a power plant comprising such a gas/liquid contacting vessel or flue gas treatment system.

A cleaner head that includes a suction inlet for admitting a first airflow, a turbine inlet for admitting a second airflow, an outlet for discharging the first airflow and the second airflow and an agitator and its drive assembly. A first airflow path then carries the first airflow from the suction inlet to the outlet, and a second airflow path carries the second airflow from the turbine inlet to the outlet. The drive assembly includes a turbine that is driven by the second airflow. A baffle is located in the second airflow path and is movable between an open position in which the second airflow path is unrestricted and a closed position in which the second airflow path is restricted. The baffle is biased in the open position and moves to the closed position when the dynamic pressure of the second airflow at the baffle exceeds a threshold.

Embodiments of methods and apparatuses for processing a renewable feedstock are provided herein. In one example, a method comprises dividing a H₂-rich make-up stream into a first H₂-rich portion and a second H₂-rich portion. The second H₂-rich portion has a lower mass flow rate than the first H₂-rich portion. The renewable feedstock is deoxygenated in the presence of the first H₂-rich portion at hydroprocessing conditions effective to form a deoxygenating reaction zone effluent that contains normal paraffins. At least a portion of the deoxygenating reaction zone effluent is isomerized in the presence of the second H₂-rich portion at isomerization conditions effective to form an isomerization reaction zone effluent that contains branched paraffin. The isomerization conditions include a first hydrogen partial pressure of about 4,140 kPa gauge or less.

An integrated refrigeration and air conditioning plant working in a cascade cycle with two different refrigerants for the low and high temperature circuits. The low temperature segment works with an ozone friendly synthetic refrigerant with a minimal amount of refrigerant charge, while the upper stage operates with another ozone friendly refrigerant with much lesser global warming potential than the one in the low stage. The upper and/or medium temperature circuit also services the air conditioning needs of the environment where the refrigerated equipment is located, such as the shop floor of a supermarket or a laboratory housing the cabinets that keep refrigerators.

The invention provides a starting control method of a rocket-based combined cycle engine inlet. Whether indoor pressure of a combustor is greater than a first pressure threshold value and smaller thanor equal to a second pressure threshold value or not is judged, if yes, the mass flow rate of an internally-installed rocket is reduced, and the secondary fuel injection quantity is reduced, so thatthe indoor pressure of the combustor is reduced. When the indoor pressure of the combustor is reduced to be smaller than the first pressure threshold value, the mass flow rate of the internally-installed rocket is improved, and the secondary fuel injection quantity is improved, so that the indoor pressure of the combustor is improved to the first pressure threshold value. By changing a working state of the internally-installed rocket, the jet flow radius of the internally-installed rocket is changed, so that the practical equivalent internal shrinkage ratio of the inlet is adjusted; and meanwhile, the combustor pressure is correspondingly reduced due to reduced fuel flow, and the inlet can be restrained to be not started through the purging action of the high-speed jet of the internally-installed rocket on low-energy boundary layers.

A method device for controlling a suction pressure of an internal combustion engine, particularly a diesel engine having an exhaust gas turbocharger. The compressor is connected to a suction line of the internal combustion engine via an actuating section having an actuating element for changing a cross-section of the actuating section. In the first step, the current suction pressure in the suction line of the internal combustion engine is determined. A compressor pressure of the compressor is determined by pressure sensors and compared to the suction pressure. Values corresponding to current operating data of the internal combustion engine are identified and an actuation signal is generated using a controller, based on the comparison; and changing the cross-section of the actuating section is adjusted by adjusting the actuating element using the actuating signals.

A supersonic cooling system operates by pumping liquid without the need of a condenser. An inlet of the system may be pulsed to reduce energy required of a pump and to increase the cooling power of the system. The supersonic cooling system utilizes a compression wave in the generation of the cooling effect. The formation of the compression wave may be assisted by a resonance chamber. An evaporator of the cooling system operates in the critical flow regime.

The invention relates to a fin cooler. The cooler comprises a shell, wherein the shell is divided into an air inlet part, an air outlet part and a heat exchange part; an air inlet and an air outlet are respectively formed in the ends of the air inlet part and the air outlet part; the heat exchange part of the shell is transversely provided with a fin tube; the two ends of the fin tube are welded with a tube plate; and a water box is arranged in the welded position of the fin tube and the tube plate, and is communicated through a connecting tube. The cooler can cool compressed air with a temperature of 129 DEG C and a pressure of 0.25 MPa. As the compressed air and a fluid are vertically staggered, the cooling effect is better.