The Experts below are selected from a list of 255 Experts worldwide ranked by ideXlab platform
V I Sharapov - One of the best experts on this subject based on the ideXlab platform.
-
energy efficiency of low temperature Deaeration of makeup water for a district heating system
Hydrotechnical Construction, 2016Co-Authors: V I Sharapov, E V KudryavtsevaAbstract:It is shown that the temperature of makeup water in district heating systems has a strong effect on the energy efficiency of turbines of thermal power plants. A low-temperature Deaeration process that considerably improves the energy efficiency of thermal power plants is developed. The desorbing agent is the gas supplied to the burners of the boiler. The energy efficiency of the process for a typical unit of thermal power plant is assessed.
-
energy effective method for low temperature Deaeration of make up water on the heating supply system of heat power plants
Thermal Engineering, 2016Co-Authors: V I Sharapov, O V Pazushkina, E V KudryavtsevaAbstract:The technology for low-temperature Deaeration of make-up water of heating supply systems is developed that makes it possible to substantially enhance the energy efficiency of heat power plants (HPPs). As a desorbing agent for Deaeration of make-up water of heating supply systems, it is proposed to use not steam or superheated water but a gas supplied to boiler burners. Natural gas supplied to steam boilers of HPPs has very low or often negative temperature after reducing devices. At the same time, it is virtually corrosive gas-free (oxygen and carbon dioxide) and, therefore, can be successfully used as the desorbing agent for water Deaeration. These factors make it possible to perform Deaeration of make-up water of heating supply systems at relatively low temperatures (10–30°C). Mixing of the cold deaerated make-up water with the return delivery water results in a significant decrease in the temperature the return delivery water before a lower delivery heater of a dual-purpose turbine plant, increase in the power output with the heat consumption, and, consequently, enhancement in the operation efficiency of the HPP. The article presents the calculation of the consumption of gas theoretically required for Deaeration and reveals the evaluation of the energy efficiency of the technology for a typical energy unit of thermal power station. The mass transfer efficiency of the Deaeration of the make-up water of heating supply systems is estimated for the case of using natural gas as the desorbing agent for which the specific gas consumption required theoretically for Deaeration is calculated. It is shown that the consumption of natural gas used as fuel in boilers of HPPs is sufficient for the Deaeration of any volumes of the make-up water of heating supply systems. The energy efficiency of the developed technology is evaluated for a typical heat power-generating unit of the HPP with a T-100-12.8 turbine. The calculation showed that the application of the new technology makes it possible to increase the electric power of the turbine, which is developed on the heat consumption, by almost 1 MW by using steam extractions for heating flows of the make-up and delivery waters. It is shown that the maximum energy efficiency of the realization of the technology for low-temperature Deaeration of water for make-up of heating supply systems is attained on HPPs with open heat supply systems characterized by large consumptions of the make-up water.
-
improvement of water thermal Deaeration technologies
Thermal Engineering, 2006Co-Authors: V I SharapovAbstract:The results of industrial test investigations of an advanced spray-jet deaerator are discussed. The capability of attaining the specified quality of water at a flash-steam flowrate of 0.07 kg/t (that is, at an essential approximation to the theoretical specific flowrate) and the minimum residual oxygen content in the deaerated water is proved to be possible.
E V Kudryavtseva - One of the best experts on this subject based on the ideXlab platform.
-
energy efficiency of low temperature Deaeration of makeup water for a district heating system
Hydrotechnical Construction, 2016Co-Authors: V I Sharapov, E V KudryavtsevaAbstract:It is shown that the temperature of makeup water in district heating systems has a strong effect on the energy efficiency of turbines of thermal power plants. A low-temperature Deaeration process that considerably improves the energy efficiency of thermal power plants is developed. The desorbing agent is the gas supplied to the burners of the boiler. The energy efficiency of the process for a typical unit of thermal power plant is assessed.
-
energy effective method for low temperature Deaeration of make up water on the heating supply system of heat power plants
Thermal Engineering, 2016Co-Authors: V I Sharapov, O V Pazushkina, E V KudryavtsevaAbstract:The technology for low-temperature Deaeration of make-up water of heating supply systems is developed that makes it possible to substantially enhance the energy efficiency of heat power plants (HPPs). As a desorbing agent for Deaeration of make-up water of heating supply systems, it is proposed to use not steam or superheated water but a gas supplied to boiler burners. Natural gas supplied to steam boilers of HPPs has very low or often negative temperature after reducing devices. At the same time, it is virtually corrosive gas-free (oxygen and carbon dioxide) and, therefore, can be successfully used as the desorbing agent for water Deaeration. These factors make it possible to perform Deaeration of make-up water of heating supply systems at relatively low temperatures (10–30°C). Mixing of the cold deaerated make-up water with the return delivery water results in a significant decrease in the temperature the return delivery water before a lower delivery heater of a dual-purpose turbine plant, increase in the power output with the heat consumption, and, consequently, enhancement in the operation efficiency of the HPP. The article presents the calculation of the consumption of gas theoretically required for Deaeration and reveals the evaluation of the energy efficiency of the technology for a typical energy unit of thermal power station. The mass transfer efficiency of the Deaeration of the make-up water of heating supply systems is estimated for the case of using natural gas as the desorbing agent for which the specific gas consumption required theoretically for Deaeration is calculated. It is shown that the consumption of natural gas used as fuel in boilers of HPPs is sufficient for the Deaeration of any volumes of the make-up water of heating supply systems. The energy efficiency of the developed technology is evaluated for a typical heat power-generating unit of the HPP with a T-100-12.8 turbine. The calculation showed that the application of the new technology makes it possible to increase the electric power of the turbine, which is developed on the heat consumption, by almost 1 MW by using steam extractions for heating flows of the make-up and delivery waters. It is shown that the maximum energy efficiency of the realization of the technology for low-temperature Deaeration of water for make-up of heating supply systems is attained on HPPs with open heat supply systems characterized by large consumptions of the make-up water.
Lucinda F Buhse - One of the best experts on this subject based on the ideXlab platform.
-
effects of Deaeration methods on dissolution testing in aqueous media a study using a total dissolved gas pressure meter
Journal of Pharmaceutical Sciences, 2006Co-Authors: Terry W Moore, William H Doub, Benjamin J Westenberger, Lucinda F BuhseAbstract:ABSTRACT: Dissolution testing is a critical method for the determination of pharmaceutical product quality and bioequivalence. For some products, dissolved gases in the dissolution medium affect dissolution results thus requiring degassing of the medium prior to use. In this study, we use a total dissolved gas and oxygen meter to measure both oxygen and total gases in dissolution media before and after application of a variety of Deaeration methods. Dissolution testing results using a 10 mg Prednisone tablet (NCDA #2) are compared with the percent saturation of oxygen and total gases found in the medium. Reaeration of the medium during different stirring rates was also measured. This study confirms that measurement of total gases and not just oxygen in the medium is necessary to assess adequacy for dissolution testing. For those Deaeration techniques that are performed at room temperature, the percent saturation of the total dissolved gases must be well below 100% to prevent outgassing once medium is brought to dissolution test method temperature, typically 37°C. © 2006 Wiley-Liss, Inc. and the American Pharmacists Association.
-
Effects of Deaeration Methods on Dissolution Testing in Aqueous Media: A Study Using a Total Dissolved Gas Pressure Meter *
Journal of Pharmaceutical Sciences, 2006Co-Authors: Terry W Moore, William H Doub, Benjamin J Westenberger, Lucinda F BuhseAbstract:ABSTRACT: Dissolution testing is a critical method for the determination of pharmaceutical product quality and bioequivalence. For some products, dissolved gases in the dissolution medium affect dissolution results thus requiring degassing of the medium prior to use. In this study, we use a total dissolved gas and oxygen meter to measure both oxygen and total gases in dissolution media before and after application of a variety of Deaeration methods. Dissolution testing results using a 10 mg Prednisone tablet (NCDA #2) are compared with the percent saturation of oxygen and total gases found in the medium. Reaeration of the medium during different stirring rates was also measured. This study confirms that measurement of total gases and not just oxygen in the medium is necessary to assess adequacy for dissolution testing. For those Deaeration techniques that are performed at room temperature, the percent saturation of the total dissolved gases must be well below 100% to prevent outgassing once medium is brought to dissolution test method temperature, typically 37°C. © 2006 Wiley-Liss, Inc. and the American Pharmacists Association.
Terry W Moore - One of the best experts on this subject based on the ideXlab platform.
-
effects of Deaeration methods on dissolution testing in aqueous media a study using a total dissolved gas pressure meter
Journal of Pharmaceutical Sciences, 2006Co-Authors: Terry W Moore, William H Doub, Benjamin J Westenberger, Lucinda F BuhseAbstract:ABSTRACT: Dissolution testing is a critical method for the determination of pharmaceutical product quality and bioequivalence. For some products, dissolved gases in the dissolution medium affect dissolution results thus requiring degassing of the medium prior to use. In this study, we use a total dissolved gas and oxygen meter to measure both oxygen and total gases in dissolution media before and after application of a variety of Deaeration methods. Dissolution testing results using a 10 mg Prednisone tablet (NCDA #2) are compared with the percent saturation of oxygen and total gases found in the medium. Reaeration of the medium during different stirring rates was also measured. This study confirms that measurement of total gases and not just oxygen in the medium is necessary to assess adequacy for dissolution testing. For those Deaeration techniques that are performed at room temperature, the percent saturation of the total dissolved gases must be well below 100% to prevent outgassing once medium is brought to dissolution test method temperature, typically 37°C. © 2006 Wiley-Liss, Inc. and the American Pharmacists Association.
-
Effects of Deaeration Methods on Dissolution Testing in Aqueous Media: A Study Using a Total Dissolved Gas Pressure Meter *
Journal of Pharmaceutical Sciences, 2006Co-Authors: Terry W Moore, William H Doub, Benjamin J Westenberger, Lucinda F BuhseAbstract:ABSTRACT: Dissolution testing is a critical method for the determination of pharmaceutical product quality and bioequivalence. For some products, dissolved gases in the dissolution medium affect dissolution results thus requiring degassing of the medium prior to use. In this study, we use a total dissolved gas and oxygen meter to measure both oxygen and total gases in dissolution media before and after application of a variety of Deaeration methods. Dissolution testing results using a 10 mg Prednisone tablet (NCDA #2) are compared with the percent saturation of oxygen and total gases found in the medium. Reaeration of the medium during different stirring rates was also measured. This study confirms that measurement of total gases and not just oxygen in the medium is necessary to assess adequacy for dissolution testing. For those Deaeration techniques that are performed at room temperature, the percent saturation of the total dissolved gases must be well below 100% to prevent outgassing once medium is brought to dissolution test method temperature, typically 37°C. © 2006 Wiley-Liss, Inc. and the American Pharmacists Association.
Colin Ramshaw - One of the best experts on this subject based on the ideXlab platform.
-
process intensification higee seawater Deaeration
Chemical Engineering Research & Design, 1998Co-Authors: J R A Peel, C R Howarth, Colin RamshawAbstract:The background to the development of a rotating packed bed (Higee) deaerator is described. Early experiments with single bubbles were followed by visualization tests involving a stationary tower with trays of knitted mesh ‘bubble choppers’. A rotating system was then designed and operated to exploit the high buoyancy forces which could be generated, and some results are presented. Very high hydraulic capacities can be achieved, so that a 400RPM rotor capable of treating 500 m3/hr of freshwater and giving 4 transfer units, is ultimately expected to be only 1 m diameter and 1.0 m long. If backmixing can be suppressed then even higher mass transfer duties can be reached.