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1

Sözen, Adnan, and H. Serdar Yücesu. "Performance improvement of absorption heat transformer." Renewable Energy 32, no. 2 (2007): 267–84. http://dx.doi.org/10.1016/j.renene.2006.01.017.

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2

Qin, Xiaoyong, Lingen Chen, Fengrui Sun, and Chih Wu. "Optimal Performance of an Endoreversible Four-Heat-Reservoir Absorption Heat-Transformer." Open Systems & Information Dynamics 11, no. 02 (2004): 147–59. http://dx.doi.org/10.1023/b:opsy.0000034193.85500.d4.

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Based on an endoreversible absorption heat-transformer cycle model operating between four temperature levels with linear (Newtonian) heat transfer law, the fundamental optimal relation between the specific heating load and the coefficient of performance, the optimal temperatures of the working substance, and the optimal heat transfer surface areas of the four heat exchangers are derived by using finite-time thermodynamics. Moreover, the effects of the cycle parameters on the cycle characteristic are studied by numerical examples. The results obtained herein can provide some guidance for the optimal design of absorption heat-transformers.
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3

Ahachad, M., M. Charia, and A. Bernatchou. "Solar absorption heat transformer applications to absorption refrigerating machines." International Journal of Energy Research 17, no. 8 (1993): 719–26. http://dx.doi.org/10.1002/er.4440170806.

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4

Chen, L., X. Qin, and F. Sun. "Model of irreversible finite-heat capacity heat reservoir absorption heat transformer cycle and its application." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 221, no. 12 (2007): 1643–51. http://dx.doi.org/10.1243/09544062jmes634.

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An irreversible four-temperature-level absorption heat transformer cycle model with variable-temperature heat reservoirs is established, which considers the heat resistances between the heat reservoirs and the working fluid, the internal irreversibility due to internal dissipation of the working fluid, and the heat leakages between the heat reservoirs and the surrounding. The general relations between the heating load and the coefficient of performance are derived, and the general performance characteristic and the optimal performance characteristic are obtained using numerical examples. Moreover, the cycle model and the derived general relations are confirmed by comparing the prediction results of the model and engineering analysis results for real absorption heat transformer, and the cycle performance characteristic are discussed. The results obtained herein can provide some guidance for the optimal design of absorption heat transformer.
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5

Irie, Tomoyoshi. "The Waste Heat Utilization by an Absorption Heat Transformer." JAPAN TAPPI JOURNAL 69, no. 7 (2015): 703–7. http://dx.doi.org/10.2524/jtappij.69.703.

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6

Balderas-Sánchez, Itzel N., J. Camilo Jiménez-García, and Wilfrido Rivera. "Modeling of a Double Effect Heat Transformer Operating with Water/Lithium Bromide." Processes 7, no. 6 (2019): 371. http://dx.doi.org/10.3390/pr7060371.

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Absorption heat transformers are effective systems for a wide variety of applications; however, their main purpose is to upgrade thermal energy from several sources at low-temperature up to a higher temperature level. In the literature, several advanced configurations for absorption heat transformers have been reported which are mainly focused on the improvement of the gross temperature lift by the use of a double absorption process; however, these systems usually offer a reduced coefficient of performance. The present study proposes a new advanced configuration of an absorption heat transformer that improves the coefficient of performance utilizing a double generation process. The operation of the new configuration was numerically modeled, and the main findings were discussed and presented emphasizing the effect of several parameters on the system performance. The highest coefficient of performance and gross temperature lift were 0.63 and 48 °C, respectively. From its comparison with a single-stage heat transformer, it is concluded that the proposed system may achieve coefficient of performance values up to 25.8% higher than those obtained with the single-stage system, although achieving lower gross temperature lifts.
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7

Goerge, John M., and S. Srinivasa Murthy. "Experiments on a vapour absorption heat transformer." International Journal of Refrigeration 16, no. 2 (1993): 107–19. http://dx.doi.org/10.1016/0140-7007(93)90067-i.

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8

Zebbar, Djallel, Sahraoui Kherris, Souhila Zebbar, and Kouider Mostefa. "Thermodynamic optimization of an absorption heat transformer." International Journal of Refrigeration 35, no. 5 (2012): 1393–401. http://dx.doi.org/10.1016/j.ijrefrig.2012.04.007.

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9

Domínguez Patiño, Jorge Avelino, Antonio Rodríguez Martínez, Rosenberg Javier Romero, Jonathan Ibarra-Bahena, and Martha Lilia Domínguez Patiño. "Environmental Impact Assessment for an Absorption Heat Transformer." Open Journal of Applied Sciences 06, no. 07 (2016): 409–15. http://dx.doi.org/10.4236/ojapps.2016.67042.

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10

Shi, Lin, Juan Yin, Xin Wang, and Ming-Shan Zhu. "Study on a new ejection–absorption heat transformer." Applied Energy 68, no. 2 (2001): 161–71. http://dx.doi.org/10.1016/s0306-2619(00)00056-8.

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11

Wang, Hanzhi, Huashan Li, Xianbiao Bu, and Lingbao Wang. "Optimum performance of a double absorption heat transformer." Energy Conversion and Management 122 (August 2016): 350–56. http://dx.doi.org/10.1016/j.enconman.2016.05.095.

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12

Balderas-Sánchez, Itzel N., Wilfrido Rivera, and J. Camilo Jiménez-García. "Thermodynamic analysis of a novel absorption heat transformer." Applied Thermal Engineering 162 (November 2019): 114268. http://dx.doi.org/10.1016/j.applthermaleng.2019.114268.

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13

Qin, Xiaoyong, Lingen Chen, Fengrui Sun, and Chih Wu. "An absorption heat-transformer and its optimal performance." Applied Energy 78, no. 3 (2004): 329–46. http://dx.doi.org/10.1016/j.apenergy.2003.08.007.

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14

Sözen, Adnan, Erol Arcaklioğlu, Mehmet Özalp, and Serdar Yücesu. "Performance parameters of an ejector-absorption heat transformer." Applied Energy 80, no. 3 (2005): 273–89. http://dx.doi.org/10.1016/j.apenergy.2004.04.004.

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15

Wang, Lingbao, Huashan Li, Xianbiao Bu, Hanzhi Wang, and Weibin Ma. "Performance Study of a Double Absorption Heat Transformer." Energy Procedia 105 (May 2017): 1473–82. http://dx.doi.org/10.1016/j.egypro.2017.03.439.

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16

QIN, Xiaoyong. "PERFORMANCE OF AN ABSORPTION HEAT-TRANSFORMER WITH DIFFERENT HEAT TRANSFER LAW." Chinese Journal of Mechanical Engineering 42, no. 02 (2006): 12. http://dx.doi.org/10.3901/jme.2006.02.012.

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17

Demesa, N., J. A. Hernández, J. Siqueiros, and A. Huicochea. "Heat transfer coefficients for helical components inside an Absorption Heat Transformer." International Journal of Heat and Mass Transfer 120 (May 2018): 342–49. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2017.12.038.

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18

Ertas, A., P. Gandhidasan, and J. J. Luthan. "Feasibility Study of Ammonia-Water Vapor Absorption Heat Transformer." Journal of Energy Resources Technology 109, no. 2 (1987): 96–100. http://dx.doi.org/10.1115/1.3231332.

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Many industrial sectors reject heat to the atmosphere in the form of hot water with a temperature between 40° and 70°C. This low grade heat can be upgraded by using a vapor absorption heat transformer (AHT). The present study considers a single stage AHT with binary mixture of NH3–H2O as the working fluid. The performance characteristics of the system have been evaluated by solving the governing mass and energy balance equations using a digital computer. It is found that the permissible range of concentration across the absorber is 0.04<ΔX<0.075 for the following operating conditions: Tusefulheat≤120°C,43°≤Twasteheat≤88°Cand10°≤Tsink≤27°C.
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19

Hong, Sung Joo, Chang Hyun Lee, Seong Min Kim, In Gwan Kim, Oh Kyung Kwon, and Chan Woo Park. "Analysis of single stage steam generating absorption heat transformer." Applied Thermal Engineering 144 (November 2018): 1109–16. http://dx.doi.org/10.1016/j.applthermaleng.2018.08.104.

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20

Ishida, Masaru, and Jun Ji. "Graphical exergy study on single stage absorption heat transformer." Applied Thermal Engineering 19, no. 11 (1999): 1191–206. http://dx.doi.org/10.1016/s1359-4311(98)00117-3.

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21

Sekar, S., and R. Saravanan. "Experimental studies on absorption heat transformer coupled distillation system." Desalination 274, no. 1-3 (2011): 292–301. http://dx.doi.org/10.1016/j.desal.2011.01.064.

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22

Ciambelli, Paolo, and Vincenzo Tufano. "Coupling a single-stage absorption heat transformer with finite heat sources/sinks." Heat Recovery Systems and CHP 10, no. 5-6 (1990): 549–53. http://dx.doi.org/10.1016/0890-4332(90)90205-x.

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23

Ma, Zhiwei, Huashan Bao, and Anthony Paul Roskilly. "Performance analysis of ultralow grade waste heat upgrade using absorption heat transformer." Applied Thermal Engineering 101 (May 2016): 350–61. http://dx.doi.org/10.1016/j.applthermaleng.2016.02.002.

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24

Qin, Xiaoyong, Lingen Chen, and Fengrui Sun. "Performance of real absorption heat-transformer with a generalized heat transfer law." Applied Thermal Engineering 28, no. 7 (2008): 767–76. http://dx.doi.org/10.1016/j.applthermaleng.2007.06.017.

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25

Yang, Sheng, Siyu Yang, Yifan Wang, and Yu Qian. "Low grade waste heat recovery with a novel cascade absorption heat transformer." Energy 130 (July 2017): 461–72. http://dx.doi.org/10.1016/j.energy.2017.04.117.

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26

Iyoki, Shigeki, Kimiaki Tanaka, and Tadashi Uemura. "Theoretical performance analysis of absorption refrigerating machine, absorption heat pump and absorption heat transformer using alcohol as working medium." International Journal of Refrigeration 17, no. 3 (1994): 180–90. http://dx.doi.org/10.1016/0140-7007(94)90017-5.

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27

Cudok, Falk, Niccolò Giannetti, José L. Corrales Ciganda, et al. "Absorption heat transformer - state-of-the-art of industrial applications." Renewable and Sustainable Energy Reviews 141 (May 2021): 110757. http://dx.doi.org/10.1016/j.rser.2021.110757.

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28

Parham, Kiyan, Mortaza Yari, and Ugur Atikol. "Alternative absorption heat transformer configurations integrated with water desalination system." Desalination 328 (November 2013): 74–82. http://dx.doi.org/10.1016/j.desal.2013.08.013.

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29

Barragan, R. M., V. M. Arellano, C. L. Heard, and R. Best. "Experimental performance of ternary solutions in an absorption heat transformer." International Journal of Energy Research 22, no. 1 (1998): 73–83. http://dx.doi.org/10.1002/(sici)1099-114x(199801)22:1<73::aid-er362>3.0.co;2-r.

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30

Murugesan, S. N., R. Saravanan, S. Renganarayanan, and K. P. Mohamed. "Solar pond operated R134a based vapour absorption heat transformer for process heat generation." International Journal of Ambient Energy 22, no. 3 (2001): 155–62. http://dx.doi.org/10.1080/01430750.2001.9674852.

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31

Meza, M., A. Márquez-Nolasco, A. Huicochea, D. Juárez-Romero, and J. Siqueiros. "Experimental study of an absorption heat transformer with heat recycling to the generator." Experimental Thermal and Fluid Science 53 (February 2014): 171–78. http://dx.doi.org/10.1016/j.expthermflusci.2013.12.002.

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32

Ciambelli, Paolo, and Vincenzo Tufano. "Coupling a two-stage absorption heat transformer with finite heat sources and sinks." Heat Recovery Systems and CHP 12, no. 3 (1992): 235–40. http://dx.doi.org/10.1016/0890-4332(92)90051-i.

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33

Romero, Rosenberg J., and A. Rodríguez-Martínez. "Optimal water purification using low grade waste heat in an absorption heat transformer." Desalination 220, no. 1-3 (2008): 506–13. http://dx.doi.org/10.1016/j.desal.2007.05.026.

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34

Efimov, N. N., E. M. Dyakonov, V. V. Papin, R. V. Bezuglov, and A. I. Yanuchok. "A CASE STUDY COMPUTATIONAL ANALYSIS OF LITHIUM BROMIDE SOLUTION FOR HOUSEHOLD ABSORPTION HEAT TRANSFORMER." Bulletin of the South Ural State University series "Power Engineering" 22, no. 3 (2022): 90–99. http://dx.doi.org/10.14529/power220310.

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Steam compression installations operating from electric energy are widely used in the world for air conditioning. This type of installation has a number of disadvantages, and therefore a new air conditioning installation has been proposed. Ab-sorption heat transformer is an air conditioning and hot water installation based on the principle of an absorption heat pump. The installation can also be used for heating. The installation is able to use renewable energy sources or utilize the heat of exhaust gases as heat sources: for example, from a heating boiler with a temperature of up to 115 °C. The practical significance of the installation lies in resource conservation and environmental friendliness. The use of this installation will ultimately reduce the consumption of primary fuel and reduce the negative impact on the environ-ment. The paper considers the possibility of using a lithium bromide solution in an absorption heat transformer for resi-dential premises. For this purpose, a number of calculations were carried out, according to the calculation method of ab-sorption refrigerating lithium bromide machines. As a result of the calculations, it was established that the use of lithium bromide solution is satisfactory for use in a household heat absorption transformer. However, in order to achieve greater efficiency, the installation scheme requires refinement.
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35

Ma, Xue-Hu, Zhong Lan, Zhaolong Hao, Qun-Chang Wang, Shoushi Bo, and Tao Bai. "Heat Transfer and Thermodynamic Performance of LiBr/H2O Absorption Heat Transformer with Vapor Absorption Inside Vertical Spiral Tubes." Heat Transfer Engineering 35, no. 11-12 (2014): 1130–36. http://dx.doi.org/10.1080/01457632.2013.863550.

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36

Iyoki, S., and T. Uemura. "Performance characteristics of the water-lithium bromide-zinc chloride-calcium bromide absorption refrigerating machine, absorption heat pump and absorption heat transformer." International Journal of Refrigeration 13, no. 3 (1990): 191–96. http://dx.doi.org/10.1016/0140-7007(90)90075-8.

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37

Qin, X., L. Chen, F. Sun, and C. Wu. "Performance of an endoreversible four-heat-reservoir absorption heat-transformer with a generalized heat transfer law." International Journal of Ambient Energy 26, no. 4 (2005): 171–79. http://dx.doi.org/10.1080/01430750.2005.9674988.

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38

Liu, Zijian, Ding Lu, Tao Shen, Rui Cheng, Rundong Chen, and Maoqiong Gong. "Improving heat supply of ammonia-water absorption heat transformer by enlarging heat source utilization temperature span." Energy 280 (October 2023): 128219. http://dx.doi.org/10.1016/j.energy.2023.128219.

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39

Demesa, Noé, José Alfredo Hernández, David Juárez, and Armando Huicochea. "Experimental assessment of heat exchangers with nested helical coils for an absorption heat transformer." Experimental Heat Transfer 34, no. 2 (2020): 140–61. http://dx.doi.org/10.1080/08916152.2020.1725181.

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40

Ma, Xuehu, Jiabin Chen, Songping Li, et al. "Application of absorption heat transformer to recover waste heat from a synthetic rubber plant." Applied Thermal Engineering 23, no. 7 (2003): 797–806. http://dx.doi.org/10.1016/s1359-4311(03)00011-5.

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41

Saito, Kiyoshi, Naoyuki Inoue, Yasuaki Nakagawa, Yukihiro Fukusumi, Hiroyuki Yamada, and Tomoyoshi Irie. "Experimental and numerical performance evaluation of double-lift absorption heat transformer." Science and Technology for the Built Environment 21, no. 3 (2015): 312–22. http://dx.doi.org/10.1080/23744731.2014.998937.

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42

Bhardwaj, P. K., S. C. Kaushik, and S. Jain. "Finite time optimisation of an irreversible vapour-absorption heat transformer system." International Journal of Ambient Energy 24, no. 4 (2003): 207–19. http://dx.doi.org/10.1080/01430750.2003.9674925.

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43

Sekar, S., and R. Saravanan. "Exergetic performance of eco friendly absorption heat transformer for seawater desalination." International Journal of Exergy 8, no. 1 (2011): 51. http://dx.doi.org/10.1504/ijex.2011.037214.

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44

Chen, Jincan. "Optimal choice of the performance parameters of an absorption heat transformer." Heat Recovery Systems and CHP 15, no. 3 (1995): 249–56. http://dx.doi.org/10.1016/0890-4332(95)90009-8.

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45

Zhao, Zongchang, Yongpo Ma, and Jiabin Chen. "Thermodynamic performance of a new type of double absorption heat transformer." Applied Thermal Engineering 23, no. 18 (2003): 2407–14. http://dx.doi.org/10.1016/j.applthermaleng.2003.08.006.

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46

Rivera, W., A. Huicochea, R. J. Romero, and A. Lozano. "Experimental assessment of double-absorption heat transformer operating with H2O/LiBr." Applied Thermal Engineering 132 (March 2018): 432–40. http://dx.doi.org/10.1016/j.applthermaleng.2017.12.117.

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47

Şencan, Arzu, Önder Kızılkan, Nalan Ç. Bezir, and Soteris A. Kalogirou. "Different methods for modeling absorption heat transformer powered by solar pond." Energy Conversion and Management 48, no. 3 (2007): 724–35. http://dx.doi.org/10.1016/j.enconman.2006.09.013.

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48

Ishida, Masaru, and Jun Ji. "Proposal of humid air turbine cycle incorporated with absorption heat transformer." International Journal of Energy Research 24, no. 11 (2000): 977–87. http://dx.doi.org/10.1002/1099-114x(200009)24:11<977::aid-er639>3.0.co;2-f.

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49

Barragán R., R. M., V. M. Arellano G., and C. L. Heard. "Performance study of a double-absorption water/calcium chloride heat transformer." International Journal of Energy Research 22, no. 9 (1998): 791–803. http://dx.doi.org/10.1002/(sici)1099-114x(199807)22:9<791::aid-er393>3.0.co;2-w.

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50

Zhang, Xiao Dong, Da Peng Hu, and Zong Chang Zhao. "Thermodynamic Performance of Absorption Heat Transformer Using a New Working Pair: Water+Ionic Liquid 1,3-dimethylimidazolium Dimethylphosphate." Advanced Materials Research 512-515 (May 2012): 1258–62. http://dx.doi.org/10.4028/www.scientific.net/amr.512-515.1258.

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In present research ionic liquid, 1,3-dimethylimidazolium dimethylphosphate ([MMIM][DMP]) and water were taken as the new working pair for absorption heat transformer (AHT). The thermodynamic cycle performance for this working pair was simulated based on its thermodynamic data, mass and energy balance for each component in a AHT. The effects of absorption and condensing temperature on the coefficient of performance (COP), exergy efficiency (ECOP), concentration deference between dense and dilution solutions and flow rate ratio were analyzed. The cycle performance comparison for AHT using two working pairs, H2O + [MMIM][DMP] and H2O + LiBr was carried out. The results indicate that the COP and ECOP of AHT for H2O+ [MMIM][DMP] are all lower than those for H2O + LiBr, but they can still reach 0.4 and 0.5 respectively when condensing and generation temperatures are 35 and 90 °C respectively. The excellent physical and chemical properties of ionic liquid mentioned above together with suitable cycle performance make this new working pair to have the potential application in absorption heat pump or absorption heat transformer.
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