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Journal articles on the topic 'Two-stage cycle'

Author: Grafiati

Published: 4 June 2021

Last updated: 18 February 2022

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1

Lee, Ho Saeng, S. T. Oh, Jung In Yoon, S. G. Lee, and K. H. Choi. "Analysis of Cryogenic Refrigeration Cycle Using Two Stage Intercooler." Defect and Diffusion Forum 297-301 (April 2010): 1146–51. http://dx.doi.org/10.4028/www.scientific.net/ddf.297-301.1146.

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This paper presents the comparison of performance characteristics for the several natural gas liquefaction cycles. The liquefaction cycle with the staged compression was designed and simulated for improving the cycle efficiency using HYSYS software. This includes a cascade cycle with a two-stage intercooler which is consisted of a Propane, Ethylene and Methane cycle. In addition, these cycles are compared with a modified staged compression process. The key parameters of the above cascade cycles were compared and analyzed. The COP (Coefficient of Performance) of the cascade cycle with a two-stage intercooler and a modified staged compression process is 13.7% and 29.7% higher than that of basic cycle. Also, the yield efficiency of LNG (Liquefied Natural Gas) improved compared with the basic cycle by 28.5%.

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2

Wang, Hong Li, Qi Long Tang, Ning Jia, and Qing Hua Zhang. "Performance Analysis of Refrigerants R134a and R1234yf Two Stage Compression Cycle with Two Condensers." Advanced Materials Research 753-755 (August 2013): 2778–81. http://dx.doi.org/10.4028/www.scientific.net/amr.753-755.2778.

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With increasing of compressor high pressure, the cycle performance of R134a or the cycle of R1234yf has a downward trend. With increasing of the evaporating temperature, the cycle performance of R134a or the cycle of R1234yf has an increasing trend. With increasing of outlet temperature of condenser, the performance of R134a or the cycle of R1234yf has a downward trend. With increasing of intermediate pressure or discharge temperature, the performances of all cycles are decreased. Under same contrast conditions, the cycle performance of R134a is better than the cycle of R1234yf.

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3

Yari, M., and M. Sirousazar. "Cycle improvements to ejector-expansion transcritical CO2 two-stage refrigeration cycle." International Journal of Energy Research 32, no. 7 (2008): 677–87. http://dx.doi.org/10.1002/er.1385.

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4

Ma, Juanli, Ahmad Mhanna, Neil Juan, Monica Brands, and Alan S. Fung. "Effects of Intercooling and Inter-Stage Heat Recovery on the Performance of Two-Stage Transcritical CO2 Cycles for Residential Heating Applications." Energies 12, no. 24 (December 13, 2019): 4763. http://dx.doi.org/10.3390/en12244763.

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Due to the harmful effects of synthetic refrigerants, such as chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs)n the environment, natural refrigerants like carbon dioxide (CO2) have been attracting great interest. The higher inter-stage superheating of CO2 makes it difficult to predict the effects of the intercooling on heating performance of a two-stage transcritical CO2 cycle. In addition, very little is known about the potential of inter-stage heat rejection recovery in the heating performance enhancement of this cycle. In order to explore the effects of intercooling and inter-stage heat rejection recovery potential, three “sub-cycles”—(1) a sub-cycle with heat recovery, (2) a sub-cycle without heat recovery, and (3) a sub-cycle without intercooling—were modeled in Engineering Equation Solver (EES) software for three commonly-used two-stage transcritical cycles: (1) an intercooler cycle, (2) a flash cycle, and (3) a split cycle. Then, the discharge pressure and intermediate pressure were simultaneously optimized. Based on the optimization results, the heating performance of the sub-cycles for each cycle were compared. The results demonstrate that the incorporation of intercooling without heat recovery was detrimental to the heating performance in comparison to the absence of intercooling. It is also clear that there is a great potential for heating performance improvement through inter-stage heat recovery.

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5

Cyklis, Piotr. "Two stage ecological hybrid sorption–compression refrigeration cycle." International Journal of Refrigeration 48 (December 2014): 121–31. http://dx.doi.org/10.1016/j.ijrefrig.2014.08.017.

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6

McCrohon, Luke. "The Two-Stage Life Cycle of Cultural Replicators." Theoria et Historia Scientiarum 9 (December 19, 2012): 149. http://dx.doi.org/10.12775/v10235-011-0009-y.

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7

UYUN, A. S., Yoshinori HAMAMOTO, K. C. A. ALAM, Atsushi AKISAWA, Akira AKAHIRA, and Takao KASHIWAGI. "Performance Simulation of Reheat Two-Stage Adsorption Cycle." Proceedings of the Symposium on Environmental Engineering 2004.14 (2004): 356–59. http://dx.doi.org/10.1299/jsmeenv.2004.14.356.

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8

UYUN, Aep Saepul, K. C. Amanul ALAM, Akira AKAHIRA, Yoshinori HAMAMOTO, Atsushi AKISAWA, and Takao KASHIWAGI. "Experimental Analysis of Reheat Two-Stage Adsorption Cycle." Proceedings of the Thermal Engineering Conference 2004 (2004): 7–8. http://dx.doi.org/10.1299/jsmeted.2004.7.

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9

AIKINS, KOJO ATTA, SANG-HYEOK LEE, and JONG MIN CHOI. "TECHNOLOGY REVIEW OF TWO-STAGE VAPOR COMPRESSION HEAT PUMP SYSTEM." International Journal of Air-Conditioning and Refrigeration 21, no. 03 (September 2013): 1330002. http://dx.doi.org/10.1142/s2010132513300024.

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There is increasing demand for domestic and industrial refrigeration, space heating and air conditioning. Heat pump systems offer economical alternatives for recovering heat from different sources for use in these applications. As a renewable energy technology for sustainable environment, the heat pump's high efficiency and low environmental impact have already drawn a fair amount of attention all over the world. Some of these domestic and industrial applications require very low evaporating temperatures and very high condensing temperatures which induce high compressor pressure ratios beyond the practical range for single-stage heat pump cycles. These high pressure ratios also produce low coefficient of performance (COP) values and expose the compressor to high discharge temperature, low volumetric efficiency and damage. However, this challenge can be overcome by adopting two-stage heat pump cycles. In this paper, recent works on two-stage heat pump systems for various applications are reviewed. They include two-stage cycle with intercooling, two-stage cycle with refrigerant injection and two-stage cascade cycle. Research and innovative designs of systems that make use of these two-stage cycles have been able to get heat pumps to handle applications with lower and higher temperatures, while enhancing heating capacity up to 30% and COP up to 31%.

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10

Xue, Gui Jun, Da Wei Liang, Guang Da Liu, Shui Qing Li, and Zhen Jiang Zhou. "Performance Analysis of Refrigerants R134a Two Stage Compression Cycle with Two Gas Cooler." Advanced Materials Research 753-755 (August 2013): 2782–85. http://dx.doi.org/10.4028/www.scientific.net/amr.753-755.2782.

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With increasing of high pressure, the two stage compression cycle with two gas cooler has a downward trend. With increasing of the evaporating temperature, the two stage compression cycle with two gas cooler has an increasing trend. With increasing of outlet temperature of condenser; the two stage compression cycle with two gas cooler has a downward trend. With increasing of intermediate pressure, the performances of the two stage compression cycle with two gas cooler are decreased.

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11

Wang Yanhai, 王艳海. "Two-Stage Noncollinear Optical Parametric Amplification Approaching Single Cycle." Acta Optica Sinica 35, no. 8 (2015): 0819002. http://dx.doi.org/10.3788/aos201535.0819002.

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12

Verheyleweghen, Adriaen, and Johannes Jäschke. "Self-Optimizing Control of a Two-Stage Refrigeration Cycle." IFAC-PapersOnLine 49, no. 7 (2016): 845–50. http://dx.doi.org/10.1016/j.ifacol.2016.07.295.

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13

Ventas, R., A. Lecuona, C. Vereda, and M. Legrand. "Two-stage double-effect ammonia/lithium nitrate absorption cycle." Applied Thermal Engineering 94 (February 2016): 228–37. http://dx.doi.org/10.1016/j.applthermaleng.2015.10.144.

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14

Yari, M. "Second law optimization of two-stage transcritical CO2 refrigeration cycles in the cooling mode operation." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 223, no. 5 (May 8, 2009): 551–61. http://dx.doi.org/10.1243/09576509jpe682.

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Second law optimization studies of two-stage transcritical CO2 (TRCC) refrigeration cycles, incorporating options such as a new ejector-expansion with internal heat exchanger (IHE) and intercooler (IC), flash gas bypass, flash gas intercooling, compressor intercooling with IHE, are presented based on cycle simulation. To validate the simulations, the available numerical data in open literature are used. It is found that the coefficient of performance (COP) and second law efficiency of the new two-stage TRCC cycle are on average 16.5, 18.4, and 28.4 per cent higher than that of the two-stage TRCC with IHE and IC, the two-stage TRCC with flash gas bypass, and the two-stage TRCC with flash gas intercooling cycles, respectively. Hence, the new two-stage refrigeration cycle is a promising refrigeration cycle from the thermodynamic point of view. It is also concluded that for cases of the flash gas bypass and flash gas intercooling the optimum inter-stage pressure deviates significantly from the geometric mean pressure of the gas cooler and evaporator pressure. While for the new two-stage TRCC and the two-stage TRCC with IHE and IC, the optimum inter-stage pressure is approximately equal to geometric mean pressure. Finally, a regression analysis was employed in terms of evaporator and gas cooler exit temperatures to develop mathematical expressions for maximum COP, optimum discharge, and inter-stage pressures and entrainment ratio.

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15

Cho, Young-Tai, Duk Chang, and James C. Young. "OPTIMIZATION OF CYCLE TIME FOR TWO-STAGE CYCLIC ANAEROBIC FILTERS." Proceedings of the Water Environment Federation 2002, no. 10 (January 1, 2002): 512–36. http://dx.doi.org/10.2175/193864702784164776.

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16

Thirumaleshwar, M., and S. V. Subramanyam. "Two stage Gifford-McMahon cycle cryorefrigerator operating at 20 K." Cryogenics 26, no. 10 (October 1986): 547–55. http://dx.doi.org/10.1016/0011-2275(86)90115-3.

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17

Rustamov, V. R., K. M. Abdullayev, and E. A. Samedov. "Biomass conversion to liquid fuel by two-stage thermochemical cycle." Energy Conversion and Management 39, no. 9 (July 1998): 869–75. http://dx.doi.org/10.1016/s0196-8904(97)10035-8.

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18

Li, Tailu, Qiulin Wang, Jialing Zhu, Kaiyong Hu, and Wencheng Fu. "Thermodynamic optimization of organic Rankine cycle using two-stage evaporation." Renewable Energy 75 (March 2015): 654–64. http://dx.doi.org/10.1016/j.renene.2014.10.058.

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19

Cyklis, Piotr. "The hybrid two stage anticlockwise cycle for ecological energy conversion." E3S Web of Conferences 10 (2016): 00008. http://dx.doi.org/10.1051/e3sconf/20161000008.

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20

Ye, Jingdong, Yahaloma Gat, and David G Lynn. "Catalyst for DNA Ligation: Towards a Two-Stage Replication Cycle." Angewandte Chemie 39, no. 20 (October 16, 2000): 3641–43. http://dx.doi.org/10.1002/1521-3773(20001016)39:20<3641::aid-anie3641>3.0.co;2-j.

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21

Ye, Jingdong, Yahaloma Gat, and David G Lynn. "Catalyst for DNA Ligation: Towards a Two-Stage Replication Cycle." Angewandte Chemie 112, no. 20 (October 16, 2000): 3787–89. http://dx.doi.org/10.1002/1521-3757(20001016)112:20<3787::aid-ange3787>3.0.co;2-i.

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22

YOKOYAMA, Tetsuhide, Toshihide KODA, Shin SEKIYA, Kei SASAKI, and Hideaki MAEYAMA. "G212 Two-Stage Rotary Compressor for CO_2 Refrigerant Injection Cycle." Proceedings of the Thermal Engineering Conference 2007 (2007): 401–2. http://dx.doi.org/10.1299/jsmeted.2007.401.

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23

Dubberke, Frithjof H., Matthias Linnemann, Wameedh Khider Abbas, Elmar Baumhögger, Klaus-Peter Priebe, Maximilian Roedder, Matthias Neef, and Jadran Vrabec. "Experimental setup of a cascaded two-stage organic Rankine cycle." Applied Thermal Engineering 131 (February 2018): 958–64. http://dx.doi.org/10.1016/j.applthermaleng.2017.11.137.

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24

Liu, Bin, Jian Chen, Shu Wu, and Sifeng Liu. "Two-stage ordering decision for a short-life-cycle product." Journal of Systems Science and Systems Engineering 15, no. 3 (September 2006): 340–58. http://dx.doi.org/10.1007/s11518-006-5020-8.

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25

Zhang, Rui, Zhihong Jin, Yu Ma, and Weixin Luan. "Optimization for two-stage double-cycle operations in container terminals." Computers & Industrial Engineering 83 (May 2015): 316–26. http://dx.doi.org/10.1016/j.cie.2015.02.007.

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26

An, G. L., L. W. Wang, and J. Gao. "Two-stage cascading desorption cycle for sorption thermal energy storage." Energy 174 (May 2019): 1091–99. http://dx.doi.org/10.1016/j.energy.2019.03.069.

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27

Cimsit, Canan, and Ilhan Tekin Ozturk. "Exergy analysis of vapour compression-absorption two-stage refrigeration cycle." International Journal of Exergy 35, no. 2 (2021): 210. http://dx.doi.org/10.1504/ijex.2021.10038625.

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28

Ozturk, Ilhan Tekin, and Canan Cimsit. "Exergy analysis of vapour compression-absorption two-stage refrigeration cycle." International Journal of Exergy 35, no. 2 (2021): 210. http://dx.doi.org/10.1504/ijex.2021.115648.

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29

Li, Xinyu, Tao Liu, and Lin Chen. "Thermodynamic Performance Analysis of an Improved Two-Stage Organic Rankine Cycle." Energies 11, no. 11 (October 23, 2018): 2864. http://dx.doi.org/10.3390/en11112864.

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In order to improve the two-stage organic Rankine cycle of two heat exchanges of exhaust gas, a two-stage organic Rankine cycle with a regenerator is proposed. Toluene, benzene, cyclohexane and R245fa were selected as the working fluids of the cycle. The thermal efficiency, exergy efficiency and net output power of the cycle were selected as the objective function of the system. The influence of the regenerative performance on the thermodynamic performance of the system was analyzed. The influence of the temperature change of the primary heat exchange outlet on the thermodynamic performance of the system is discussed. The research shows that the regenerator can increase the net power and thermal efficiency of the cycle output. For the selected working fluid, as the efficiency of the regenerator increases, the thermal efficiency of the cycle and the net output power increase. When the primary heat exchange outlet temperature of the exhaust gas increases, the net output power and the exergy efficiency of the cycle increase. For the selected working fluid, when the exhaust heat exchange outlet temperature was increased from 410 K to 490 K, the net output power of the cycle increased up to 10.76 kW, and the exergy efficiency increased up to 7.85%.

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30

Eskandari Manjili, F., and M. Cheraghi. "Performance of a new two-stage transcritical CO2 refrigeration cycle with two ejectors." Applied Thermal Engineering 156 (June 2019): 402–9. http://dx.doi.org/10.1016/j.applthermaleng.2019.03.083.

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31

Rao, P. Tirupathi, D. Flora Evangil, and K. Madhavi. "Stochastic Programming on Optimal Drug Administration for Two Stage Cancer Treatment Problems." International Journal of Green Computing 3, no. 1 (January 2012): 1–10. http://dx.doi.org/10.4018/jgc.2012010101.

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Either Continuous drug administration or continuous drug vacation for long spells of cancer chemotherapy is not suggestible. Similarly the quantum of administered drug dose either above the required level or below the wanted level is also not advised. Effective drug administration has to consider the optimal threshold limits on the drug administration/drug vacation times; upper and lower limits of drug quantity; along with the suitable number of drug administration/drug vacation cycles; and the number of spells within the cycle of drug usage/stoppage. This paper develops an optimization programming problem for designing drug administration strategies for a cancer patient under chemotherapy. This study will help in exploring the decision parameters at the targeted objectives. Optimal decisions on drug dosage level, drug administration period, drug vacation period, number of drug administration cycles; number of drugs applied within a cycle, etc., can be obtained with the model. Sensitivity analysis is carried out for understanding the model behavior. This work has a scope for developing health care Decision Support Systems.

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32

Marston, C. H., and M. Hyre. "Gas Turbine Bottoming Cycles: Triple-Pressure Steam Versus Kalina." Journal of Engineering for Gas Turbines and Power 117, no. 1 (January 1, 1995): 10–15. http://dx.doi.org/10.1115/1.2812757.

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The performance of a triple-pressure steam cycle has been compared with a single-stage Kalina cycle and an optimized three-stage Kalina cycle as the bottoming sections of a gas turbine combined cycle power plant. A Monte Carlo direct search was used to find the optimum separator temperature and ammonia mass fraction for the three-stage Kalina cycle for a specific plant configuration. Both Kalina cycles were more efficient than the triple pressure steam cycle. Optimization of the three-stage Kalina cycle resulted in almost a two percentage point improvement.

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33

Xue, Gui Jun, Da Wei Liang, Guang Da Liu, Shui Qing Li, and Zhen Jiang Zhou. "Performance Analysis of Refrigerants R134a Two Stage Compression Cycle with an Expander." Advanced Materials Research 753-755 (August 2013): 2786–89. http://dx.doi.org/10.4028/www.scientific.net/amr.753-755.2786.

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With increasing of compressor high pressure, the two stage cycle with an expander has a downward trend. With increasing of the evaporating temperature, the two stage cycle with an expander has an increasing trend. With increasing of outlet temperature of condenser; the two stage cycle with an expander has a downward trend. With increasing of intermediate pressure, the performance of the two stage cycle with an expander is decreased.

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34

Liu, Xiu Fang, Fa Hui Wang, and Fan Mao Meng. "Experimental Study on Two-Stage Cascade Low Temperature Pre-Cooling Equipment." Applied Mechanics and Materials 42 (November 2010): 322–25. http://dx.doi.org/10.4028/www.scientific.net/amm.42.322.

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A two-stage cascade pre-cooling test bed was designed and set up to develop a -30°C /-60°C pre-cooling equipment. An internal heater exchanger and a condenser were set in low-temperature cycle. Theoretically the two stages can work stably at setting temperature and the low-temperature cycle can operate independently with aided starting of the high-temperature cycle. The experimental results indicate that the test bed can provide cooling capacity steadily at -46°C and -100°C respectively and the low-temperature cycle cannot operate alone for compressor overload protection. Based on the analysis, the possible reasons and detailed suggestions were put forward.

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35

RAHMAN, Abul Fazal Mohammad Mizanur, Yuki UEDA, Atsushi AKISAWA, Takahiko MIYAZAKI, and Bidyut Baran SAHA. "Innovative Design and Performance of Three-Bed Two-Stage Adsorption Cycle under Optimized Cycle Time." Journal of Environment and Engineering 7, no. 1 (2012): 92–108. http://dx.doi.org/10.1299/jee.7.92.

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36

Chen, Ling Yun, Jia Yi Du, Yin Nan Yuan, and Lei Zhu. "The Study of HEV Special Two-Stage TWC Characteristics." Advanced Materials Research 588-589 (November 2012): 295–98. http://dx.doi.org/10.4028/www.scientific.net/amr.588-589.295.

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As there are many shortcomings for the traditional three-way catalyst (TWC),too large thermal inertia ,low heat capacity and poor thermal insulation properties .A new hybrid vehicles special two-stage TWC is designed.The experiment was carried out at drum test bench and frequent start/stop cycle condition.The result shows that the first-stage catalyst core temperature was maintained at 450°Cafter engine stop 200s, the peak value of HC emissions is only exist at the beginning 30 sec and the conversion efficiency of NOx up to 90% .The hybrid vehicles special two-stage TWC fully meet the frequent start / stop and transient cycle conditions requirment.

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37

Liu, Guanglin, Qingyang Wang, Jinliang Xu, and Zheng Miao. "Exergy Analysis of Two-Stage Organic Rankine Cycle Power Generation System." Entropy 23, no. 1 (December 30, 2020): 43. http://dx.doi.org/10.3390/e23010043.

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Organic Rankine cycle (ORC) power generation is an effective way to convert medium and low temperature heat into high-grade electricity. In this paper, the subcritical saturated organic Rankine cycle system with a heat source temperature of 100~150 °C is studied with four different organic working fluids. The variations of the exergy efficiencies for the single-stage/two-stage systems, heaters, and condensers with the heat source temperature are analyzed. Based on the condition when the exergy efficiency is maximized for the two-stage system, the effects of the mass split ratio of the geothermal fluid flowing into the preheaters and the exergy efficiency of the heater are studied. The main conclusions include: The exergy efficiency of the two-stage system is affected by the evaporation temperatures of the organic working fluid in both the high temperature and low temperature cycles and has a maximum value. Under the same heat sink and heat source parameters, the exergy efficiency of the two-stage system is larger than that of the single-stage system. For example, when the heat source temperature is 130 °C, the exergy efficiency of the two-stage system is increased by 9.4% compared with the single-stage system. For the two-stage system, analysis of the four organic working fluids shows that R600a has the highest exergy efficiency, although R600a is only suitable for heat source temperature below 140 °C, while other working fluids can be used in systems with higher heat source temperatures. The mass split ratio of the fluid in the preheaters of the two-stage system depends on the working fluid and the heat source temperature. As the heat source temperature increases, the range of the split ratio becomes narrower, and the curves are in the shape of an isosceles triangle. Therefore, different working fluids are suitable for different heat source temperatures, and appropriate working fluid and split ratio should be determined based on the heat source parameters.

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38

Nasution, Robiatun Hasanah, Nurmaini Ginting, and Melvariani Syari. "PENERAPAN MODEL PEMBELAJARAN KOOPEATIF TIPE TEMAS GAMES TOURNAMENT UNTUK MENINGKATKAN MOTIVASI BELAJAR BIOLOGI SISWA DI SMA NEGERI 5 PADANGSIDIMPUAN." Journal of Natural Sciences 1, no. 2 (July 21, 2020): 105–22. http://dx.doi.org/10.34007/jons.v1i2.220.

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This research aims is to find out the improvement of students' biology learning motivation through the Teams Games Tournament (TGT) cooperative learning model.The research method is classroom action research (CAR) carried out in two cycles, each of which consists of four stages, namely: the first stage of planning, the second stage of implementation, the third stage of observation, and the fourth stage of reflection.the results of the study: motivation of the first cycle 73.52% increased in the second cycle to 79.41% increase in the second cycle of 14.7%. Learning outcomes in the first cycle 73.52% increased in the second cycle to 79.41%. The increase in both cycles was 5.89%. Learning Management cycle I 89.33% increased almost perfectly in the second cycle to 92% increase in the second cycle to 2.67%. the results of observations of student in cycle I 65,21% in cycle II 73,78% increase in both cycles by 8.57%it can be concluded that students' biology learning motivation increases with the application of the Teams Games Tournament (TGT) cooperative learning model.

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39

Thirumaleshwar, M., and R. M. Pandey. "Two stage Gifford-McMahon cycle cryorefrigerator operated by gas balancing principle." Cryogenics 30, no. 2 (February 1990): 100–104. http://dx.doi.org/10.1016/0011-2275(90)90253-9.

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40

Natu, P. V., and K. G. Narayankhedkar. "Performance prediction and parametric analysis of two stage stirling cycle cryocooler." Cryogenics 34 (January 1994): 219–22. http://dx.doi.org/10.1016/s0011-2275(05)80047-5.

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41

CHOI, Jae-sung, Yuzuru SHIMAMOTO, and Kazuhiro KANAMARU. "Prediction of performance for two-stage turbocharged four cycle diesel engines." Transactions of the Japan Society of Mechanical Engineers Series B 52, no. 480 (1986): 3114–20. http://dx.doi.org/10.1299/kikaib.52.3114.

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42

Jiang, L., L. W. Wang, W. L. Luo, and R. Z. Wang. "Experimental study on working pairs for two-stage chemisorption freezing cycle." Renewable Energy 74 (February 2015): 287–97. http://dx.doi.org/10.1016/j.renene.2014.08.011.

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43

SELBAS, Resat, Fatih Yilmaz, and Murat ÖZTURK. "Comparative Thermodynamic Performance Assessment of Two-Stage Cycle for Various Refrigerants." International Journal of Exergy 29, no. 1/2 (2019): 1. http://dx.doi.org/10.1504/ijex.2019.10019315.

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44

Yilmaz, Fatih, Murat Ozturk, and Reşat Selbaş. "Comparative thermodynamic performance assessment of two-stage cycle for various refrigerants." International Journal of Exergy 29, no. 2/3/4 (2019): 110. http://dx.doi.org/10.1504/ijex.2019.100359.

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45

Özgür, Arif Emre, and Hilmi Cenk Bayrakçi. "Second law analysis of two-stage compression transcritical CO2heat pump cycle." International Journal of Energy Research 32, no. 13 (October 25, 2008): 1202–9. http://dx.doi.org/10.1002/er.1415.

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46

LEWIS, SUZAN N. C., and CARY L. COOPER. "Stress in two-earner couples and stage in the life-cycle." Journal of Occupational Psychology 60, no. 4 (December 1987): 289–303. http://dx.doi.org/10.1111/j.2044-8325.1987.tb00261.x.

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47

Chen, Jincan, and Chih Wu. "Maximum specific power output of a two-stage endoreversible combined cycle." Energy 20, no. 4 (April 1995): 305–9. http://dx.doi.org/10.1016/0360-5442(94)00081-d.

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48

Liu, Bo, Philippe Rivière, Christophe Coquelet, Renaud Gicquel, and Franck David. "Investigation of a two stage Rankine cycle for electric power plants." Applied Energy 100 (December 2012): 285–94. http://dx.doi.org/10.1016/j.apenergy.2012.05.044.

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Ouadha, Ahmed, Mohammed En-nacer, Lahouari Adjlout, and Omar Imine. "Exergy analysis of a two-stage refrigeration cycle using two natural substitutes of HCFC22." International Journal of Exergy 2, no. 1 (2005): 14. http://dx.doi.org/10.1504/ijex.2005.006430.

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Kang, Jin-Gu, Dong-Woo Lim, and Jin-Woo Jung. "Energy-Efficient Forest Fire Prediction Model Based on Two-Stage Adaptive Duty-Cycled Hybrid X-MAC Protocol." Sensors 18, no. 9 (September 5, 2018): 2960. http://dx.doi.org/10.3390/s18092960.

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Abstract:

This paper proposes an adaptive duty-cycled hybrid X-MAC (ADX-MAC) protocol for energy-efficient forest fire prediction. The Asynchronous sensor network protocol, X-MAC protocol, acquires additional environmental status details from each forest fire monitoring sensor for a given period, and then changes the duty-cycle sleep interval to efficiently calculate forest fire occurrence risk according to the environment. Performance was verified experimentally, and the proposed ADX-MAC protocol improved throughput by 19% and was 24% more energy efficient compared to the X-MAC protocol. The duty-cycle was shortened as forest fire probability increased, ensuring forest fires were detected at faster cycle rate.

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