40 results about "Gas thermometer" patented technology

An ultrasonic apparatus measures the concentration and flow rate of a sample gas by calculating a possible propagation time range on the basis of the gas temperature, determining whether or not the phases at which two first trigger signals, respectively generated on the basis of forward and backward waveforms of the ultrasonic waves, coincide with each other, processing the zero-cross signals so that the phases coincide with each other, obtaining reference zero-cross time instant by calculating mean value of the forward and backward zero-cross time instants, obtaining an ultrasonic reception point by subtracting an integral multiple of the cycle of the ultrasonic waves so that the results of the subtraction falls into a possible propagation time range and estimating the ultrasonic propagation time on the basis of the ultrasonic reception point.

A sensor output value estimation device that effectively estimates sensor output values reflecting a response delay of a temperature sensor. The device includes an estimated gas temperature calculation unit for calculating an estimated gas temperature of an engine on a basis of at least a running condition of the engine and a state quantity of the gas in the engine. The device also includes an estimated sensor output value calculation unit for calculating an estimated sensor output value reflecting the response delay of the temperature sensor on a basis of the calculated estimated gas temperature and a pre-stored first model formula specifying a relation among the temperature change time constant of the temperature sensor, the gas flow rate, and the gas temperature.

An oxyfuel boiler 1 is equipped with an oxygen separation apparatus 23 to produce oxygen by separating oxygen from the air, a recirculation fan 26 to supply a portion of combustion flue gas branched from the combustion flue gas discharged from the boiler to the oxyfuel boiler 1, a temperature sensor 14a to detect gas temperature at a boiler outlet 1d in the oxyfuel boiler 1, and a control apparatus 150 to calculate gas temperature at a furnace outlet 1c in the boiler from the gas temperature at the boiler outlet 1d detected by the temperature sensor 14a and control the operating condition of the recirculation fan 26 so that the calculated gas temperature at the furnace outlet 1c becomes a desired preset gas temperature.

The objective of the present invention is to provide a hybrid construction machine wherein a power storage device can quickly be warmed up and the service life of the power storage device can be improved. This hybrid construction machine is equipped with: an engine (1); an electric motor that supplements the power of the engine (1) and generates power; a power storage device (8) that transmits power to and receives power from the electric motor; a warmup circuit (25) that circulates a heating medium heated by waste heat from the engine (1) or the electric motor, or by a heater (40), in the vicinity of the power storage device (8); a control device that controls the charging / discharging of the power storage device (8) and the circulation of the heating medium by the warmup circuit (25); and an outside air temperature measurement device that measures the outside air temperature. The control device performs a warmup operation by means of the heating medium, determines whether to perform charging / discharging of the power storage device (8) for the purpose of a warmup operation, in response to the outside air temperature as measured by the outside air temperature measurement device, and executes a warmup operation wherein the warmup operation based on charging / discharging of the power storage device (8) is performed at the same time.

The present invention provides an ultrasonic apparatus measures the concentration and flow rate of a sample gas by calculating a possible propagation time range on the basis of the gas temperature, determining whether or not the phases at which two first trigger signals, respectively generated on the basis of forward and backward waveforms of the ultrasonic waves, coincide with each other, processing the zero-cross signals so that the phases coincide with each other, obtaining reference zero-cross time instant by calculating mean value of the forward and backward zero-cross time instants, obtaining an ultrasonic reception point by subtracting an integral multiple of the cycle of the ultrasonic waves so that the results of the subtraction falls into a possible propagation time range and estimating the ultrasonic propagation time on the basis of the ultrasonic reception point.

The invention discloses a multi-functional gas sampling system and a gas sampling method in the field of gas sampling devices. The system adopts the structure that a gas inlet opening and a gas outlet opening of an off-gas pump are respectively connected with a first switching valve and a second switching valve, an overvoltage protection valve and a gas collecting opening are arranged between thefirst switching valve and the second switching valve, and a gas thermometer, an integrating flowmeter, a water drain pipe, a dust collecting pipe and a gas inlet opening which are connected in seriesin sequence are connected on a connector opposite to a connector of the first switching valve and the overvoltage protection valve. The gas sampling method comprises the following steps: 1. processing gas to be sampled for a gas sampling pipeline by a prepumping gas passage; 2. cleaning a gas sampling bag; and 3. collecting the gas. The filtrating and the dehydrating are performed to the gas required for analysis, and then the gas is transformed into dried gas to be filled in a special gas container so as to ensure that the gas is in a stable state; the volume and the total mass of the dried gas are accurately measured, and the analyzed gas is accurately measured and analyzed; and the invention is suitable for sampling combustible gas, atmosphere, biological metabolites and tail gas in chemical plants, and the like.

The invention provides a gas spray cooling system arranged in front of a gas holder, and belongs to the technical field of the gas holder and pipeline projects. The system comprises the gas holder, a gas pipeline outside the gas holder and a gas spray cooling device; the gas holder comprises a cylinder body and a gas pipeline inside the gas holder; and the gas spray cooling device comprises a plurality of sets of spray guns, a PLC frequency conversion control cabinet and a gas thermometer inside the gas holder, and the gas thermometer inside the gas holder is arranged at the lower part of the cylinder body of the gas holder, is electrically connected to the PLC frequency conversion control cabinet and is used for monitoring the temperature of gas in the gas holder and participating in start and stop control over the gas spray cooling device. According to the system, a monitoring point of the temperature of the gas in the gas holder is additionally arranged, the gas spray cooling device is started when the temperature in the gas holder exceeds a set value, and therefore the potential mixing and cooling function and the heat dissipation ability of the gas holder are given full play to. The system is of great significance for saving energy and lowering consumption of iron and steel enterprises and prolonging the service life of sealing oil of the gas holder.