Pneumatic system has been widely used throughout industry, and it consumes more than billions kW h of electricity one year all over the world. So as to improve the efficiency of pneumatic system, its power evaluation as well as measurement methods should be proposed, and their applicability should be validated. In this paper, firstly, power evaluation and measurement methods of pneumatic system were introduced for the first time. Secondly, based on the proposed methods, power distributions in pneumatic system was analyzed. Thirdly, through the analysis on pneumatic efficiencies of typical compressors and pneumatic components, the applicability of the proposed methods were validated. It can be concluded that, first of all, the proposed methods to evaluation and measurement the power of pneumatic system were efficient. Furthermore, the pneumatic power efficiencies of pneumatic system in the air production and cleaning procedure are respectively about 35%-75% and 85%-90%. Moreover, the pneumatic power efficiencies of pneumatic system in the transmission and consumption procedures are about 70%-85% and 10%-35%. And the total pneumatic power efficiency of pneumatic system is about 2%-20%, which varies largely with the system configuration. This paper provides a method to analyze and measure the power of pneumatic system, lay a foundation for the optimization and energy-saving design of pneumatic system.
Yan Shi
,
Maolin Cai
,
Weiqing Xu
,
Yixuan Wang
. Methods to Evaluate and Measure Power of Pneumatic System and Their Applications[J]. Chinese Journal of Mechanical Engineering, 2019
, 32(3)
: 42
-42
.
DOI: 10.1186/s10033-019-0354-6
Pneumatic system has been widely used throughout industry, and it consumes more than billions kW h of electricity one year all over the world. So as to improve the efficiency of pneumatic system, its power evaluation as well as measurement methods should be proposed, and their applicability should be validated. In this paper, firstly, power evaluation and measurement methods of pneumatic system were introduced for the first time. Secondly, based on the proposed methods, power distributions in pneumatic system was analyzed. Thirdly, through the analysis on pneumatic efficiencies of typical compressors and pneumatic components, the applicability of the proposed methods were validated. It can be concluded that, first of all, the proposed methods to evaluation and measurement the power of pneumatic system were efficient. Furthermore, the pneumatic power efficiencies of pneumatic system in the air production and cleaning procedure are respectively about 35%-75% and 85%-90%. Moreover, the pneumatic power efficiencies of pneumatic system in the transmission and consumption procedures are about 70%-85% and 10%-35%. And the total pneumatic power efficiency of pneumatic system is about 2%-20%, which varies largely with the system configuration. This paper provides a method to analyze and measure the power of pneumatic system, lay a foundation for the optimization and energy-saving design of pneumatic system.
[1] S W Mei, J J Wang, F Tian, et al. Design and engineering implementation of non-supplementary fired compressed air energy storage system: TICC-500. Science China Technological Sciences, 2015, 58(4): 600-611.
[2] M Saadat, F A Shirazi, P Y Li. Modeling and control of an open accumulator Compressed Air Energy Storage (CAES) system for wind turbines. Applied Energy, 2015, 137: 603-616.
[3] Sun X Q, L Chen, S H Wang, et al. Vehicle height control of electronic air suspension system based on mixed logical dynamical modelling. Science China Technological Sciences, 2015, 58(11): 1894-1904.
[4] Y Shi, M Cai. Dimensionless study on output flow characteristics of expansion energy used pneumatic pressure booster. Journal of Dynamic Systems, Measurement and Control, 2013, 135(2): 021007.
[5] D Wolf, M Budt. LTA-CAES-A low-temperature approach to adiabatic compressed air energy storage. Applied Energy, 2014, 125: 158-164.
[6] P Radgen. Efficiency through compressed air energy audits. Energy Audit Conference, 2006.
[7] A P Senniappan. Baselining a compressed air system—an expert systems approach. Morgantown: West Virginia University, USA, 2004.
[8] H B Qin, A McKane. Improving energy efficiency of compressed air system based on system audit. Shanghai: Lawrence Berkeley National Laboratory, 2008.
[9] M L Cai, K Kawashima, T Kagawa. Power assessment of flowing compressed air. Journal of Fluids Engineering, 2006, 128(2): 402-405.
[10] Dutch National Team, "Compressed Air: Savings of 30% Are Quite Normal", CADDET Energy Efficiency, Newsletter, 1999(3): 14-16.
[11] S Chen, C Youn, T Kagawa, et al. Transmission and consumption of air power in pneumatic system. Energy and Power Engineering, 2014, 6(13): 487.
[12] C J Cargo, A J Hillis, A R Plummer. Strategies for active tuning of wave energy converter hydraulic power take-off mechanisms. Renewable Energy, 2016, 94: 32-47.
[13] G Yang, J Jiang. Power characteristics of a variable hydraulic transformer. Chinese Journal of Aeronautics, 2015, 28(3): 914-931.
[14] Y Lin, J Bao, H Liu, et al. Review of hydraulic transmission technologies for wave power generation. Renewable and Sustainable Energy Reviews, 2015, 50: 194-203.
[15] M L Cai, T Kagawa. Energy consumption assessment of pneumatic actuating systems including compressor. Proceedings of International Conference on Compressors and Their Systems, 2001: 381-390.
[16] Y Shi, M L Cai. Working characteristics of two kinds of air-driven boosters. Energy Conversion and Management, 2011, 52(12): 3399-3407.
[17] Y Shi, T C Wu, M L Cai, et al. Energy conversion characteristics of a hydropneumatic transformer in a sustainable-energy vehicle. Applied Energy, 2016, 171: 77-85.
[18] Y Shi, T C Wu, M L Cai, et al. Modelling and study on the output flow characteristics of expansion energy used hydropneumatic transformer. Journal of Mechanical Science and Technology, 2016, 30(3): 1163-1170.
[19] P P Liao, M L Cai, Y Shi, et al. Compressed air leak detection based on time delay estimation using a portable multi-sensor ultrasonic detector. Measurement Science and Technology, 2013, 24(5): 055102.
[20] Q Xu, M L Cai, Y Shi. Dynamic heat transfer model for temperature drop analysis and heat exchange system design of the air-powered engine system. Energy, 2014, 68: 877-885.
[21] Q Y Xu, Y Shi, Q H Yu, et al. Virtual prototype modeling and performance analysis of the air-powered engine. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 2014, 228(14): 2642-2651.
[22] Q H Yu, M L Cai, Y Shi, et al. Dimensionless study on efficiency and speed characteristics of a compressed air engine. Journal of Energy Resources Technology, 2014, 137(4): 2181-2193.
[23] Y Shi, X M Tong, M L Cai. Temperature effect compensation for fast differential pressure decay testing. Measurement Science & Technology, 2014, 25(6): 11260-11276.
[24] Y Shi, Y X Wang, M L Cai, et al. Power characteristics of a new kind of air‐powered vehicle. International Journal of Energy Research, 2016, 40(8): 1112-1121.
[25] Y X Wang, Y Shi, M L Cai, et al. Efficiency optimized fuel supply strategy of aircraft engine based on air-fuel ratio control. Chinese Journal of Aeronautics, 2019, 32(2): 489-498.
[26] D K Shen, Q L Chen, Y X Wang. Dimensionless energy conversion characteristics of an air-powered hydraulic vehicle. Applied Sciences, 2018, 8(3): 347.
[27] M L Cai, Y X Wang, Y Shi, et al. Output dynamic control of a late model sustainable energy automobile system with nonlinearity. Advances in Mechanical Engineering, 2016, 8(11): 1687814016672784.
