[1] Regulation (eu) on fluorinated greenhouse gases and repealing regulation (ec), 2014.
[2] Handbook-Fundamentals, ASHRAE. American society of heating. Refrigerating and Air-Conditioning Engineers, 2009.
[3] Lorentzen, G. The use of natural refrigerants: a complete solution to the cfc/hcfc predicament. International Journal of Refrigeration, 18(3):190–197, 1995.
[4] Nekså, P., Rekstad, Havard, Zakeri, G. R., and Schiefloe, P. A. CO2-heat pump water heater: characteristics, system design and experimental results. International Journal of Refrigeration-revue Internationale Du Froid, 21:172– 179, 1998.
[5] Masson, N. Guide to natural refrigerants, state of the industry north america & in the world. 4th annual Atmosphere America 2015, Atlanta, 2015.
[6] Guo, Yonghui, Zhang, Guoqiang, Zhou, Jin, Wu, Jiasheng, and Shen, Wei. A techno-economic comparison of a direct expansion ground-source and a secondary loop groundcoupled heat pump system for cooling in a residential building. Applied Thermal Engineering, 35:29–39, 2012.
[7] B., Erdogan. The effect of soil type on sizing of vertical single u-tube ground heat exchanger for ground source heat pump. in International Scientific Conference, pp. 230–239, Gabrovo, 2010. International Scientific Conference.
[8] Walsh, B. Analysis of a ground coupled heat exchanger. Master’s thesis, Faculty of Rensselaer Polytechnic Institute, Hartford, 2011.
[۹] اکبری باصری, علیرضا و سیروس, آقانجفی. عملکرد پمپ حرارتی زمینگرمایی ترکیبی به همراه برج خنککن در اقلیمهای آبوهوایی ایران. مجله مهندسی مکانیک, 24(1):46--57, 1394.
[10] Zhai, X.Q., Cheng, X.W., and Wang, R.Z. Heating and cooling performance of a minitype ground source heat pump system. Applied Thermal Engineering, 111:1366– 1370, 2017.
[۱۱] رحمتی, احمدرضا و نجار نظامی, امین. ارزیابی عملکرد یک سیستم پمپ حرارتی زمینگرمایی-خورشیدی برای گرمایش یک گلخانه. مجله مهندسی مکانیک, 28(3):28--33, 1398.
12] Jin, Zhequan, Eikevik, Trygve M., Neksa, Petter, and Hafner, Armin. Investigation on CO2 hybrid groundcoupled heat pumping system under warm climate. International Journal of Refrigeration, 62:145–152, 2016.
[13] Jin, Zhequan, Eikevik, Trygve M., Neksa, Petter, and Hafner, Armin. A steady and quasi-steady state analysis on the CO2 hybrid ground-coupled heat pumping system. International Journal of Refrigeration, 76:29–41, 2017.
[۱۴] قاضیزاده احسائی, حسین و عامری, مهران. بررسی پمپ حرارتی زمین گرمایی انبساط مستقیم دیاکسید کربن. مهندسی مکانیک مدرس, 17(6):433--443, 1396.
[۱۵] قاضیزاده احسائی, حسین و عامری, مهران. عملکرد پمپ حرارتی زمین گرمایی انبساط مستقیم دیاکسید کربن با استفاده از
منبسطکننده و مبدل حرارتی داخلی. مهندسی مکانیک مدرس, 17(11), 1396.
[16] Oritz, TM, Li, Daqing, and Groll, Eckhard A. Evaluation of the performance potential of co2 as a refrigerant in airto-air air conditioners and heat pumps: system modeling and analysis, 2003.
[17] Austin, Brian T. and Sumathy, K. Parametric study on the performance of a direct-expansion geothermal heat pump using carbon dioxide. Applied Thermal Engineering, 31(17):3774–3782, 2011. SET 2010 Special Issue.
[18] Pitla, Srinivas S., Groll, Eckhard A., and Ramadhyani, Satish. New correlation to predict the heat transfer coefficient during in-tube cooling of turbulent supercritical co2. International Journal of Refrigeration, 25(7):887–895, 2002.
[19] Gnielinski, V. New equations for heat and mass transfer in the turbulent flow in pipes and channels. NASA STI/Recon Technical Report A, 41(1):8–16, 1975. Provided by the SAO/NASA Astrophysics Data System.
[20] Bi, Yuehong, Wang, Xinhong, Liu, Yun, Zhang, Hua, and Chen, Lingen. Comprehensive exergy analysis of a groundsource heat pump system for both building heating and cooling modes. Applied Energy, 86(12):2560–2565, 2009.
[21] Jung, D and Radermacher, R. Prediction of evaporation heat transfer coefficient and pressure drop of refrigerant mixtures in horizontal tubes. International Journal of Refrigeration, 16(3):201–209, 1993.
[22] Jung, D.S., McLinden, M., Radermacher, R., and Didion, D. A study of flow boiling heat transfer with refrigerant mixtures. International Journal of Heat and Mass Transfer, 32(9):1751–1764, 1989.
[23] Stephan, K. and Abdelsalam, M. Heat-transfer correlations for natural convection boiling. International Journal of Heat and Mass Transfer, 23(1):73–87, 1980.
[24] Friedel, L. Improved friction pressure drop correlations for horizontal and vertical two phase pipe flow. Proc. of European Two-Phase Flow Group Meet., 18(7):485–491, 1979.
[25] Kusuda, Tamami and Achenbach, Paul R. Earth temperature and thermal diffusivity at selected stations in the united states. tech. rep., National Bureau of Standards Gaithersburg MD, 1965.