Why increasing water flow rate can increase the absorption efficiency in gas absorption column ?4 answersIncreasing water flow rate can enhance absorption efficiency in a gas absorption column due to the improved dynamics and hydrodynamics within the system. As water flow rate increases, the range of possible air flow rates decreases until flooding onset, indicating a more controlled absorption process. Additionally, higher liquid flow rates have been shown to increase CO2 removal efficiency in various absorption studies, such as with non-precipitating potassium carbonate promoted with glycine and monoethanolamine (MEA) solutions. The absorption efficiency benefits from the increased liquid flow rate by facilitating better contact between the gas and liquid phases, leading to more effective absorption of the target gas components like CO2, ultimately improving the overall performance of the absorption column.
How temperature Influences on flow rate measurement ?5 answersTemperature influences flow rate measurement by affecting the performance of various flow sensors. For instance, in ultrasonic flow meters, high temperatures can limit operation, necessitating complex designs. On the other hand, a laser diode-based flowmeter utilizes temperature differences to measure flow rates accurately, with adjustments in energy enhancing lower flow range measurements. Additionally, the use of an electroactive material device in flow sensors allows for decoupling temperature and pressure effects, enabling accurate temperature measurements at any pressure level. Furthermore, changes in flow temperature along a tube can be indicative of flow rate variations, with the ratio of temperature changes at different points aiding in evaluating average flow speed. Overall, temperature plays a crucial role in flow rate measurement methodologies, impacting sensor design and measurement accuracy.
How to calculate mass flow rate from tds value and volumetric flow rate?5 answersTo calculate mass flow rate from TDS value and volumetric flow rate, various methods can be employed based on different technologies. One approach involves using a Coriolis meter to measure the apparent bulk density and a microwave meter to determine the permittivity of the multiphase flow, enabling the calculation of phase volume fractions and actual bulk mass flow rate. Another method utilizes a MEMS sensor chip to determine the density and viscosity of the fluid flowing in a tube, along with a detected pressure drop over the sensor chip's measuring channel to determine the volumetric and mass flow rate of the medium. Additionally, a novel concept proposes direct mass flow rate measurement by correlating flow-induced stresses in a substrate, eliminating the need for density information.
How flow rate affect the overpotential?4 answersThe flow rate has an effect on the overpotential in certain systems. In the field of fluid flow through porous media, the streaming current coefficient (Cc) is influenced by the flow state, with a decrease observed at higher Reynolds numbers (Re). This decrease in Cc is attributed to a mechanical effect, specifically the smaller apparent permeability for nonlinear laminar flow, rather than a chemical effect on the zeta potential. The decreasing rate of Cc with increasing Re is found to be much less than that of permeability, indicating that nonlinear laminar flow induces more streaming current per unit flow rate. Additionally, in the study of mineral growth and dissolution reactions, it is observed that at high flow rates, reactions favor the formation of stable minerals, while at low flow rates, less stable phases can be produced.
How gas/liquid flow rate affect the centrifugal separation?3 answersThe gas/liquid flow rate has a significant impact on centrifugal separation. In the gas-liquid centrifugal separation structure at a low flow rate, the low fluid speed caused by high working pressure ensures that the natural gas meets the water dew point requirement for output. In the centrifugal gas-liquid separation, the U-shaped structure and the centrifugal force generated during rotating flow promote effective separation. The centrifugal separator with multiple adjacent concentric cyclonic chambersforces the gas/liquid mixture to flow up and down through respective chambers, causing deceleration and maximizing efficient separation. The straight-flow centrifugal gas-liquid separatorachieves separation due to centrifugal force and can handle a wide range of loads. The gas-liquid separation devicestabilizes the flow of liquid and eliminates foams generated during centrifugal separation.
How to control flow rate on pumps?3 answersFlow rate on pumps can be controlled using various methods and devices. One method involves calculating and determining a control amount based on a given flow rate, and then adjusting the flow rate of the pumping equipment accordingly. If the deviation between the actual flow rate and the given flow rate exceeds a preset range, a fine regulation control amount is calculated and used to correct the control amount. Another approach is to use a pump control device with a drive converter connected to a central processing unit. The flow rate sensor detects the flow rate of the water, and the software application receives input values from the user and performs calculations to adjust the pump drive operation accordingly. Additionally, a method involves obtaining a flow adjusting command from a user, comparing it with the existing flow numerical value, and adjusting the rotating speed of the pump motor and the opening degree of an adjusting valve accordingly. Another flow rate control apparatus controls the flow rate of liquid by controlling the discharge amount of the pump and maintaining a target flow rate. A flow rate control system based on PLC and additional peripheral components has also been developed and tested, providing reliable flow regulation and maintenance.