The Experts below are selected from a list of 231 Experts worldwide ranked by ideXlab platform

Xiaolin Wang - One of the best experts on this subject based on the ideXlab platform.

  • Theoretical study of two-stage water Vapor Compression systems
    Applied Thermal Engineering, 2019
    Co-Authors: Jiubing Shen, Guozeng Feng, Ziwen Xing, Xiaolin Wang
    Abstract:

    Water Vapor Compression is a key technology that greatly affects system performance in heat pump and Mechanical Vapor Compression/reCompression applications. In this paper, two-stage water Vapor Compression methods (cascaded centrifugal compressors and combined centrifugal and twin-screw compressors) were proposed and studied to deal with the water Compression process with large suction volume flow rates and high Compression pressure ratios. A mathematical model was developed, and the thermal characteristics, achievable volume flow rate and saturation temperature rise of the two water Compression systems were presented. The two-stage Compression process using cascaded centrifugal compressors was found to be better for applications with total saturation temperature rise lower than 40 °C. The two-stage Compression process using combined centrifugal and twin-screw compressors was found to satisfy applications with a saturation temperature rise as high as 80 °C. Further investigation showed that the second method could deliver a suction volume flow rate of 1418 m3/min with a suction Vapor temperature of 50 °C using a current market-available twin-screw compressor with a capacity of 600 m3/min. The performance of the combined systems was largely affected by the pressure ratio and the compressor efficiency, system suction Vapor temperature, and total Vapor saturation temperature rise. The analyses showed that the combined system had high energy efficiency above 3.4 under all studied working conditions.

  • Development of a water-injected twin-screw compressor for Mechanical Vapor Compression desalination systems
    Applied Thermal Engineering, 2016
    Co-Authors: Jiubing Shen, Ziwen Xing, Zhilong He, Kai Zhang, Xiaolin Wang
    Abstract:

    The water-injected twin-screw compressor is a key component in the Mechanical Vapor Compression (MVC) desalination system, which is a promising technology for small and medium scale water production. This paper presents an experimental study on a water-injected twin-screw compressor. A prototype is developed and applied in a 50 m3/day double-effect MVC system. The effect of important parameters (including compressor rotation speed, water injection flow rate and compressor inlet temperature) on the compressor performance is experimentally investigated. It is found that the volumetric flow rate and power consumption of the compressor increases almost linearly with the rise in compressor rotation speed. Results also show that the compressor inlet temperature only affects the power consumption of the twin-screw compressor. It has minor effect on the volumetric flow rate, and volumetric and isentropic efficiencies of the compressor. Study further shows that water injection substantially reduces the compressor discharge temperature. As the water injection flow rate increases, the Vapor Compression process more closely approaches saturation Vapor Compression and hence the isentropic efficiency of the twin-screw compressor increases. The analyses demonstrate that the water-injected twin-screw compressor can be reliably operated in the MVC system with satisfactory system performance.

  • analysis of a single effect Mechanical Vapor Compression desalination system using water injected twin screw compressors
    Desalination, 2014
    Co-Authors: Jiubing Shen, Ziwen Xing, Xiaolin Wang, Zhilong He
    Abstract:

    Abstract The Mechanical Vapor Compression (MVC) desalination system is very attractive and competitive for small and medium scale water production. This paper presents a comprehensive analysis of a single-effect MVC desalination system using water injected twin screw compressors. The operational characteristics of the twin screw compressor including inlet volume flow rate, compressor pressure ratio, and mass fraction of injected water are investigated. The specific power consumption and the specific heat transfer area of the MVC system are then analyzed based on these characteristics. The results are comparable with data reported in literature for similar single-effect MVC desalination systems. Further comparison is performed for a single-effect MVC system using a twin screw compressor with/without water injection. The results demonstrate that the single-effect MVC desalination system using water injected twin screw compressor is a very promising technology for water production capacities less than 600 m3/d. It also shows that the temperature difference between boiling Vapor and compressed Vapor at compressor exit can be as high as 10 °C.

Zhilong He - One of the best experts on this subject based on the ideXlab platform.

  • Development of a water-injected twin-screw compressor for Mechanical Vapor Compression desalination systems
    Applied Thermal Engineering, 2016
    Co-Authors: Jiubing Shen, Ziwen Xing, Zhilong He, Kai Zhang, Xiaolin Wang
    Abstract:

    The water-injected twin-screw compressor is a key component in the Mechanical Vapor Compression (MVC) desalination system, which is a promising technology for small and medium scale water production. This paper presents an experimental study on a water-injected twin-screw compressor. A prototype is developed and applied in a 50 m3/day double-effect MVC system. The effect of important parameters (including compressor rotation speed, water injection flow rate and compressor inlet temperature) on the compressor performance is experimentally investigated. It is found that the volumetric flow rate and power consumption of the compressor increases almost linearly with the rise in compressor rotation speed. Results also show that the compressor inlet temperature only affects the power consumption of the twin-screw compressor. It has minor effect on the volumetric flow rate, and volumetric and isentropic efficiencies of the compressor. Study further shows that water injection substantially reduces the compressor discharge temperature. As the water injection flow rate increases, the Vapor Compression process more closely approaches saturation Vapor Compression and hence the isentropic efficiency of the twin-screw compressor increases. The analyses demonstrate that the water-injected twin-screw compressor can be reliably operated in the MVC system with satisfactory system performance.

  • analysis of a single effect Mechanical Vapor Compression desalination system using water injected twin screw compressors
    Desalination, 2014
    Co-Authors: Jiubing Shen, Ziwen Xing, Xiaolin Wang, Zhilong He
    Abstract:

    Abstract The Mechanical Vapor Compression (MVC) desalination system is very attractive and competitive for small and medium scale water production. This paper presents a comprehensive analysis of a single-effect MVC desalination system using water injected twin screw compressors. The operational characteristics of the twin screw compressor including inlet volume flow rate, compressor pressure ratio, and mass fraction of injected water are investigated. The specific power consumption and the specific heat transfer area of the MVC system are then analyzed based on these characteristics. The results are comparable with data reported in literature for similar single-effect MVC desalination systems. Further comparison is performed for a single-effect MVC system using a twin screw compressor with/without water injection. The results demonstrate that the single-effect MVC desalination system using water injected twin screw compressor is a very promising technology for water production capacities less than 600 m3/d. It also shows that the temperature difference between boiling Vapor and compressed Vapor at compressor exit can be as high as 10 °C.

Jiubing Shen - One of the best experts on this subject based on the ideXlab platform.

  • Theoretical study of two-stage water Vapor Compression systems
    Applied Thermal Engineering, 2019
    Co-Authors: Jiubing Shen, Guozeng Feng, Ziwen Xing, Xiaolin Wang
    Abstract:

    Water Vapor Compression is a key technology that greatly affects system performance in heat pump and Mechanical Vapor Compression/reCompression applications. In this paper, two-stage water Vapor Compression methods (cascaded centrifugal compressors and combined centrifugal and twin-screw compressors) were proposed and studied to deal with the water Compression process with large suction volume flow rates and high Compression pressure ratios. A mathematical model was developed, and the thermal characteristics, achievable volume flow rate and saturation temperature rise of the two water Compression systems were presented. The two-stage Compression process using cascaded centrifugal compressors was found to be better for applications with total saturation temperature rise lower than 40 °C. The two-stage Compression process using combined centrifugal and twin-screw compressors was found to satisfy applications with a saturation temperature rise as high as 80 °C. Further investigation showed that the second method could deliver a suction volume flow rate of 1418 m3/min with a suction Vapor temperature of 50 °C using a current market-available twin-screw compressor with a capacity of 600 m3/min. The performance of the combined systems was largely affected by the pressure ratio and the compressor efficiency, system suction Vapor temperature, and total Vapor saturation temperature rise. The analyses showed that the combined system had high energy efficiency above 3.4 under all studied working conditions.

  • Development of a water-injected twin-screw compressor for Mechanical Vapor Compression desalination systems
    Applied Thermal Engineering, 2016
    Co-Authors: Jiubing Shen, Ziwen Xing, Zhilong He, Kai Zhang, Xiaolin Wang
    Abstract:

    The water-injected twin-screw compressor is a key component in the Mechanical Vapor Compression (MVC) desalination system, which is a promising technology for small and medium scale water production. This paper presents an experimental study on a water-injected twin-screw compressor. A prototype is developed and applied in a 50 m3/day double-effect MVC system. The effect of important parameters (including compressor rotation speed, water injection flow rate and compressor inlet temperature) on the compressor performance is experimentally investigated. It is found that the volumetric flow rate and power consumption of the compressor increases almost linearly with the rise in compressor rotation speed. Results also show that the compressor inlet temperature only affects the power consumption of the twin-screw compressor. It has minor effect on the volumetric flow rate, and volumetric and isentropic efficiencies of the compressor. Study further shows that water injection substantially reduces the compressor discharge temperature. As the water injection flow rate increases, the Vapor Compression process more closely approaches saturation Vapor Compression and hence the isentropic efficiency of the twin-screw compressor increases. The analyses demonstrate that the water-injected twin-screw compressor can be reliably operated in the MVC system with satisfactory system performance.

  • analysis of a single effect Mechanical Vapor Compression desalination system using water injected twin screw compressors
    Desalination, 2014
    Co-Authors: Jiubing Shen, Ziwen Xing, Xiaolin Wang, Zhilong He
    Abstract:

    Abstract The Mechanical Vapor Compression (MVC) desalination system is very attractive and competitive for small and medium scale water production. This paper presents a comprehensive analysis of a single-effect MVC desalination system using water injected twin screw compressors. The operational characteristics of the twin screw compressor including inlet volume flow rate, compressor pressure ratio, and mass fraction of injected water are investigated. The specific power consumption and the specific heat transfer area of the MVC system are then analyzed based on these characteristics. The results are comparable with data reported in literature for similar single-effect MVC desalination systems. Further comparison is performed for a single-effect MVC system using a twin screw compressor with/without water injection. The results demonstrate that the single-effect MVC desalination system using water injected twin screw compressor is a very promising technology for water production capacities less than 600 m3/d. It also shows that the temperature difference between boiling Vapor and compressed Vapor at compressor exit can be as high as 10 °C.

Jiubing She - One of the best experts on this subject based on the ideXlab platform.

  • modeling and performance study of a water injected twin screw water Vapor compressor
    International Journal of Refrigeration-revue Internationale Du Froid, 2017
    Co-Authors: Yafe Tia, Jiubing She, Ziwe Xing, Chuang Wang, Xiaoli Wang
    Abstract:

    Due to the reason of water injection, twin screw water Vapor compressor can realize higher pressure ratio and saturated temperature lift of compressed Vapor. Its application in Mechanical Vapor Compression (MVC) heat pump systems has drawn much attention recently because of the great energy-saving potential and reliability. In this paper, a thermodynamic model of the working process in water injected twin screw water Vapor compressor is established, in which heat and mass transfer between water liquid and Vapor are considered. Its accuracy is validated by the experimental recorded p–V indicator diagrams. With the proposed model, the compressor performance is simulated and studied. According to the simulation results, water injection can increase the volumetric efficiency 5% and adiabatic indication efficiency 6%. Once the discharged Vapor has been cooled to saturation, the shaft power of the compressor will increase while the adiabatic indication efficiency and the volume flow rate together with the volumetric efficiency change little with the continuous increase of injected water. Since the sensible heat of water is much smaller than latent heat, the temperature of injected water has little effect on the performance. Both the volume flow rate and shaft power increase linearly with the rotor speed. In addition, the volume flow rate of injected water should be adjusted with the regulation of rotor speed to guarantee a saturate discharge temperature. The volumetric efficiency will increase and the adiabatic indication efficiency will decrease slowly with the rise of rotor speed. Due to the cooling and eVaporation effects of liquid water at the discharge chamber, the adiabatic indication efficiency does not decline when it operates at under Compression condition. Water injection can greatly improve the compressor performance when the compressor operates at under Compression or over Compression condition, especially where a high saturated temperature lift of compressed Vapor is in demand.

  • experiment study of a water injected twin screw compressor for Mechanical Vapor Compression system
    2014 Purdue Conferences. 22nd International Compressor Engineering Conference at Purdue., 2014
    Co-Authors: Jiubing She, Hao Tang, Zhe Zhang, Ziwe Xing
    Abstract:

    The Mechanical Vapor Compression (MVC) system is a promising way for energy saving among energy intensive industries such as desalination, food and beverage, chemistry and waste water concentration etc. In practical its application is limited by the Vapor compressor technology which is demanded to have high pressure ratio for large saturation temperature difference and low discharge Vapor temperature. Due to the ability of wet Compression, twin screw compressor can overcome the technical limitation above by the injection of liquid water into the working chamber. In this paper a test rig of a MVC system with water injected twin screw compressor has been designed and built. Compressor performance of power consumption and discharge temperature was measured. Moreover, operation characteristics of the water injected twin screw compressor were studied by the measurement of its working process p-t diagram. The results of the experiment study can provide some design guidance of water injected twin screw water Vapor compressor for MVC system.

Ziwen Xing - One of the best experts on this subject based on the ideXlab platform.

  • Theoretical study of two-stage water Vapor Compression systems
    Applied Thermal Engineering, 2019
    Co-Authors: Jiubing Shen, Guozeng Feng, Ziwen Xing, Xiaolin Wang
    Abstract:

    Water Vapor Compression is a key technology that greatly affects system performance in heat pump and Mechanical Vapor Compression/reCompression applications. In this paper, two-stage water Vapor Compression methods (cascaded centrifugal compressors and combined centrifugal and twin-screw compressors) were proposed and studied to deal with the water Compression process with large suction volume flow rates and high Compression pressure ratios. A mathematical model was developed, and the thermal characteristics, achievable volume flow rate and saturation temperature rise of the two water Compression systems were presented. The two-stage Compression process using cascaded centrifugal compressors was found to be better for applications with total saturation temperature rise lower than 40 °C. The two-stage Compression process using combined centrifugal and twin-screw compressors was found to satisfy applications with a saturation temperature rise as high as 80 °C. Further investigation showed that the second method could deliver a suction volume flow rate of 1418 m3/min with a suction Vapor temperature of 50 °C using a current market-available twin-screw compressor with a capacity of 600 m3/min. The performance of the combined systems was largely affected by the pressure ratio and the compressor efficiency, system suction Vapor temperature, and total Vapor saturation temperature rise. The analyses showed that the combined system had high energy efficiency above 3.4 under all studied working conditions.

  • Development of a water-injected twin-screw compressor for Mechanical Vapor Compression desalination systems
    Applied Thermal Engineering, 2016
    Co-Authors: Jiubing Shen, Ziwen Xing, Zhilong He, Kai Zhang, Xiaolin Wang
    Abstract:

    The water-injected twin-screw compressor is a key component in the Mechanical Vapor Compression (MVC) desalination system, which is a promising technology for small and medium scale water production. This paper presents an experimental study on a water-injected twin-screw compressor. A prototype is developed and applied in a 50 m3/day double-effect MVC system. The effect of important parameters (including compressor rotation speed, water injection flow rate and compressor inlet temperature) on the compressor performance is experimentally investigated. It is found that the volumetric flow rate and power consumption of the compressor increases almost linearly with the rise in compressor rotation speed. Results also show that the compressor inlet temperature only affects the power consumption of the twin-screw compressor. It has minor effect on the volumetric flow rate, and volumetric and isentropic efficiencies of the compressor. Study further shows that water injection substantially reduces the compressor discharge temperature. As the water injection flow rate increases, the Vapor Compression process more closely approaches saturation Vapor Compression and hence the isentropic efficiency of the twin-screw compressor increases. The analyses demonstrate that the water-injected twin-screw compressor can be reliably operated in the MVC system with satisfactory system performance.

  • analysis of a single effect Mechanical Vapor Compression desalination system using water injected twin screw compressors
    Desalination, 2014
    Co-Authors: Jiubing Shen, Ziwen Xing, Xiaolin Wang, Zhilong He
    Abstract:

    Abstract The Mechanical Vapor Compression (MVC) desalination system is very attractive and competitive for small and medium scale water production. This paper presents a comprehensive analysis of a single-effect MVC desalination system using water injected twin screw compressors. The operational characteristics of the twin screw compressor including inlet volume flow rate, compressor pressure ratio, and mass fraction of injected water are investigated. The specific power consumption and the specific heat transfer area of the MVC system are then analyzed based on these characteristics. The results are comparable with data reported in literature for similar single-effect MVC desalination systems. Further comparison is performed for a single-effect MVC system using a twin screw compressor with/without water injection. The results demonstrate that the single-effect MVC desalination system using water injected twin screw compressor is a very promising technology for water production capacities less than 600 m3/d. It also shows that the temperature difference between boiling Vapor and compressed Vapor at compressor exit can be as high as 10 °C.