شبیه‌سازی و بررسی عملکرد سیستم سرمایش دسیکنت کوپل شده با یک مبدل حرارتی زمین به هوا

نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار، گروه مهندسی مکانیک، دانشکده فنی و مهندسی، دانشگاه محقق اردبیلی، اردبیل، ایران

2 دانشجوی کارشناسی ارشد، گروه مهندسی مکانیک، دانشکده فنی و مهندسی، دانشگاه محقق اردبیلی، اردبیل، ایران

3 دانشیار، گروه مهندسی مکانیک، دانشکده فنی و مهندسی، دانشگاه محقق اردبیلی، اردبیل، ایران

10.52547/jrenew.10.2.46

چکیده

در مقاله حاضر یک سیستم ترکیبی جدید شامل سیستم سرمایش دسیکنت و مبدل حرارتی زمین به هوا پیشنهاد و بررسی شده است. عملکرد حرارتی سیستم پیشنهادی با سیستم سرمایش دسیکنت معمول و همچنین کولر آبی مقایسه شده است. برای مدل‌سازی چرخ دسیکنت از روش قیاس (analogy method) استفاده شده است و برای بررسی مبدل حرارتی زمین به هوا و سیال داخل آن، لوله مبدل، به چند قسمت مساوی تقسیم شده و با استفاده از مدل‌های مقاومت-ظرفیت، معادلات دیفرانسیل جهت بررسی انتقال حرارت در لوله و سیال داخل آن حل شده است.  شبیه‌سازی‌ها برای شهر تهران و با استفاده از داده‌های واقعی آب و هوای بیرون انجام گرفته است. مقایسه این سیستم ترکیبی با سیستم دسیکنت معمول و کولر آبی نشان می‌دهد که متوسط دمای هوای ورودی به اتاق برای این سیستم ترکیبی در مقایسه با سیستم دسیکنت معمول و کولر آبی به ترتیب 1/1 و 3/5 درجه سلسیوس پایین‌تر است. بررسی پارامتریک نشان داد که افزایش طول لوله مبدل از 30 متر به 50 متر 44/3 % متوسط ظرفیت سرمایش سیستم ترکیبی را افزایش می‌دهد. همچنین مشخص شد که افزایش قطر لوله مبدل تاثیر چندانی در افزایش ظرفیت سرمایشی سیستم ندارد. افزایش مقدار دبی حجمی هوا  از cfm200 به cfm400 باعث شد که متوسط ظرفیت سرمایش به میزان 58/94 % افزایش یابد.

کلیدواژه‌ها

موضوعات


[1] F. Jomehzadeh, P. Nejat, J.K. Calautit, M.B.M. Yusof, S.A. Zaki, B.R. Hughes, M.N.A.W.M. Yazid, A review on windcatcher for passive cooling and natural ventilation in buildings, Part 1: Indoor air quality and thermal comfort assessment. Renewable and Sustainable Energy Reviews, Vol. 70, pp.736-756, 2017.
[2] G. Heidarinejad, V. Khalajzadeh, S. Delfani, Performance analysis of a ground-assisted direct evaporative cooling air conditioner, Building and Environment, Vol. 45, No. 11, pp. 2421–2429, 2010.
[3] Z. Emdadi, A. Maleki, M. Mohammad, N. Asim, M. Azizi, Coupled Evaporative and Desiccant Cooling Systems for Tropical Climate. International Journal of Environmental Science, Vol. 2, 2017.
 [4] Gh. Faghani and M. Kohkan, Increasing the efficiency of evaporative condensing systems using earth-to-air heat exchangers the first conference of mechanics, electrical and computer engineering 2020 (in Persian).
 [5] L.W. Davis and P.J. Gertler, Contribution of air conditioning adoption to future energy use under global warming. Proceedings of the National Academy of Sciences, Vol. 112, No. 19, pp. 5962-5967, 2015.
[6] F.E. Nia, D.Van Paassen, M.H. Saidi, Modeling and simulation of desiccant wheel for air conditioning. Energy and buildings, Vol. 38, No. 10, pp. 1230-1239, 2006.
[7]  Z. Liu, P. Sun, S. Li, Z. J. Yu, M. El Mankibi, L. Roccamena, T. Yang, G. Zhang, Enhancing a vertical earth-to-air heat exchanger system using tubular phase change material. Journal of Cleaner Production, Vol. (237). pp. 117763, 2019.
[8] V. Bansal, R. Misra, G. Das Agrawal, J. Mathur, Performance analysis of earth – pipe – air heat exchanger for summer cooling, Energy and Buildings, Vol. 42, No.5, pp. 645–648, 2010.
[9] L.Z. Zhang and J.L. Niu, A pre-cooling Munters environmental control desiccant cooling cycle in combination with chilled-ceiling panels. Energy, Vol. 28, No. 3, pp. 275-292, 2003..
[10] E. Hürdoğan, O.Büyükalaca, T. Yılmaz, A. Hepbasli, İ. Uçkan, Investigation of solar energy utilization in a novel desiccant based air conditioning system. Energy and buildings, Vol. 55, pp. 757-764, 2012.
[11] D. Pandelidis, A. Pacak, A. Cichoń, S. Anisimov, P. Drąg, B. Vager, V. Vasilijev, Multi-stage desiccant cooling system for moderate climate. Energy conversion and management, Vol. 177, pp. 77-90, 2018.
[12] G. Heidarinejad and H. Pasdarshahri, The effects of operational conditions of the desiccant wheel on the performance of desiccant cooling cycles. Energy and Buildings, Vol. 42, No.12, pp. 2416-2423, 2010.
[13] J.D. Liang, C.L. Kao, L.K. Tsai, Y.C. Chiang, H.C. Tsai, S.L. Chen, Performance investigation of a hybrid ground-assisted desiccant cooling system. Energy Conversion and Management, Vol. 265, pp. 115765, 2022.
[14] J.C. Scheridan and J.W. Mitchell, A hybrid solar desiccant cooling system. Sol. Energy;(United Kingdom), Vol. 34. No.2, 1985.
[15] A. Speerforck and G. Schmitz, Experimental investigation of a ground-coupled desiccant assisted air conditioning system. Applied energy, Vol. 181, pp. 575-585, 2016.
[16] W.Casas and G. Schmitz, Experiences with a gas driven, desiccant assisted air conditioning system with geothermal energy for an office building, Energy and buildings, Vol. 37, No. 5, pp. 493-501, 2005.
 [17] U. Berardi, G. Heidarinejad, S. Rayegan, H. Pasdarshahri, Enhancing the cooling potential of a solar-assisted desiccant cooling system by ground source free cooling, Building Simulation, Vol. 13, No. 5, pp. 1125-1144, 2013.
[18] A.A. Serageldin, A.K.Abdelrahman, S. Ookawara, Earth-Air Heat Exchanger thermal performance in Egyptian conditions: Experimental results, mathematical model, and Computational Fluid Dynamics simulation. Energy Conversion and management, Vol. 122, pp. 25-38, 2016.
[19] D. Yang, Y.Guo, J. Zhang, Evaluation of the thermal performance of an earth-to-air heat exchanger in a harmonic thermal environment. Energy Conversion and Management, Vol. 109, pp. 184-194, 2016.
[20] F. Al-Ajmi, D.L. Loveday, V.I. Hanby, The cooling potential of earth–air heat exchangers for domestic buildings in a desert climate. Building and Environment, Vol. 41, No. 3, pp. 235-244, 2006.
[21] M. Maerefat, S. Ahmadi, A. Haghighi Poshtiri, Investigation and performance analysis of a hybrid cooling system of air underground channel and direct evaporative cooler. Modares Mechanical Engineering , Vol. 15, No. 5, pp.137-144, 2105 (In Persian). 
[22] N. Nemati, A.Omidvar, B. Rosti, Performance evaluation of a novel hybrid cooling system combining indirect evaporative cooler and earth-air heat exchanger. Energy, Vol. 215, p.119216, 2021.
[23] S.L. Do, J.C. Baltazar, J. Haberl, Potential cooling savings from a ground-coupled return-air duct system for residential buildings in hot and humid climates. Energy and Buildings, Vol. 103, pp. 206-215, 2015.
[24] J.A.A.W. Jassim, Sustainable design of wind-catcher of an earth-to-air heat exchanger in hot dry areas. International Journal of Scientific & Engineering Research, Vol. 6, No. 4, pp. 582-589, 2015.
[25] I.L. Maclaine-Cross and P.J. Banks, Coupled heat and mass transfer in regenerators—prediction using an analogy with heat transfer. International Journal of Heat and Mass Transfer, Vol. 15, No. 6, pp. 1225-1242, 1972.
[26] I.L. Maclaine-Cross, Theory of Combined Heat and Mass Transfer in Regenerators. Ph. D. Thesis, Monash University, 1974.
[27] P.J. Banks, Coupled quilibrium heat and single adsorbate transfer in fluid flow through a porous medium—I Characteristic potential and specific capacity ratios, Chemical Engineering Science, Vol. 27. No. 5, pp.1143-1155, 1972.
[28] J.J. Jurinak, Open Cycle Solid Desiccant Cooling--Component Models and System Simulations. The University of Wisconsin-Madison,1982.
[29] W.M. Kays and A.L. London, Compact heat exchangers, McGraw Hill, 1984.
[30] A. Minaei, Z. Talee, H. Safikhani, H. Ghaebi, Thermal resistance capacity model for transient simulation of Earth-Air Heat Exchangers. Renewable Energy, Vol. 167, pp. 558-567, 2021.
[31] T. Kusuda and P.R. Achenbach, Earth temperature and thermal diffusivity at selected stations in the United States. National Bureau of Standards Gaithersburg MD, 1965.
[32] H.S. Carslaw and J.C. Jaeger, Conduction of heat in solids, Clarendon. , 1959.
[33] D.W. Hahn and M.N. Özisik, Heat conduction. John Wiley & Sons, 2012.
[34] M. De Carli, M.Tonon, A. Zarrella, R. Zecchin, A computational capacity resistance model (CaRM) for vertical ground-coupled heat exchangers. Renewable energy, Vol. 35, No.7, pp. 1537-1550, 2010.
[35] D. Bauer, W. Heidemann, H.J. Diersch, Transient 3D analysis of borehole heat exchanger modeling. Geothermics, Vol. 40, No. 4, pp. 250-260, 2011.
[36] A. Zarrella, M. Scarpa, M. De Carli, Short time step analysis of vertical ground-coupled heat exchangers: The approach of CaRM. Renewable Energy, Vol. 36, No. 9, pp. 2357-2367, 2011.
 [37] A. Minaei and M. Maerefat, Thermal resistance capacity model for short-term borehole heat exchanger simulation with non-stiff ordinary differential equations. Geothermics, Vol. 70, pp. 260-270, 2017.
[38] T.L. Bergman, T.L.Bergman, F.P. Incropera, D.P. Dewitt, A.S. Lavine, Fundamentals of heat and mass transfer. John Wiley & Sons, 2011.
[39] W.R. Martini, Natural convection inside a horizontal cylinder, AIChE Journal, Vol. 6, No. 2, pp. 251-257, 1960.
[40] J.R. Camargo, C.D. Ebinuma, J.L. Silveira, Experimental performance of a direct evaporative cooler operating during summer in a Brazilian city. International journal of Refrigeration, Vol. 28, No. 7, pp.1124-1132, 2005.
[41] T.H. Kuehn, J.W. Ramsey, J.L. Threlkeld, Thermal enviromental engineering.  Upper Saddle River, NJ: Prentice Hall, 1998.
[42] Elias Moore , Heating Systems: Design, Applications and Technology, Nova Science, 2020.
[43] A. Kodama, T. Hirayama, M. Goto, T. Hirose, R.E. Critoph, The use of psychrometric charts for the optimisation of a thermal swing desiccant wheel. Applied Thermal Engineering, Vol. 21, No. 16, pp. 1657-1674, 2001.
[44] A. Minaei, M. Bagheri, M. Maerefat, H. Ghaebi, Thermal Performance Evaluation of Earth-to-Air Heat Exchanger Using a Semi-Transient Analytical Model. Journal of Mechanical Engineering (Tabriz University), Vol. 52, No.1, pp. 139-148. 2022.