Papers by Rouhollah Ahmadi
The Proceedings of the International Conference on Nuclear Engineering (ICONE), 2011
Iranian Journal of Information Processing and Management, 2021
Abstract: Increasing demand for energy, pollution from fossil energy consumption and global warmi... more Abstract: Increasing demand for energy, pollution from fossil energy consumption and global warming are the key factors that have made optimal energy management necessary. The advent of information technology has led to the emergence of a new paradigm called the Internet of Energy (IOE). IOE is a new concept that provides the tools needed for optimal energy management. IOE has expanded dramatically with the advent of the Internet of Things (IOTs). So that the Internet of Energy moves towards energy management by integrating the features of smart grids and the Internet of Things. The present study is an applied research that aimed at conceptualizing of the Internet of Energy. In order to achieve the research objectives, a series of indicators of IOE were identified according to the previous studies and interviews with experts. The pattern of causal relations of these indices has been identified by the FUZZY DEMATEL technique. Then, these factors have been analyzed by Interpretive Str...
Numerical Optimization of a Household Radiator and Experimental Investigation of Its Thermal Capacity
Energy Engineering Management, 2015
هلاقم تاعلاطا هدیکچ لماک یشهوژپ هلاقم :تفایرد 20 ریت 1396 :شریذپ 28 رویرهش 1396 :تیاس رد هئارا 05... more هلاقم تاعلاطا هدیکچ لماک یشهوژپ هلاقم :تفایرد 20 ریت 1396 :شریذپ 28 رویرهش 1396 :تیاس رد هئارا 05 نابآ 1396 لاس رد لااب تیفیک اب بآ و یژرنا یاضاقت و تیمها هب ریخا یاه لباق روط هظحلام یا ازفا ی ش ی هتفا دنور نیا و تسا هب تدش .تفای دهاوخ همادا هار زا یکی نیریش ،بآ دوبمک لضعم لح یاه سونایقا روش بآ یزاس ترارح رگا و تسا یترارح شور هب اه نآ زاین دروم طسوت اه رده تفر یترارح لکیس کی هاگورین شور ریاس اب تباقر لباق ،دوش نیمأت یترارح لکیس زا ،هلاقم نیا رد .تسا اه دیسکا یتخوس لیپ یبیکرت یترارح یزاگ نیبروت و دماج هب ناونع مأت ی ن هدننک ،زاین دروم ترارح ی هدافتسا هدش متسیس ود نیا زا هدش هئارا بیکرت ،اجنیا رد .تسا متسیس هارمه هب بآ نیریش هلحرم دنچ یترارح نک یا هنیزه شهاک ،یگدنیلاآ شهاک ،یژرنا فرصم شهاک بجوم یاه هیامرس یراذگ یرادهگن و ریمعت و و متسیس اب هسیاقم رد نامدنار شیازفا یم لقتسم یاه لیلحت .دشاب صتقا و یژرزگا یاه همانرب طسوت یبیکرت متسیس هعومجم یدا ار ی هنا ا رد ی
An experimental facility for the acquisition of reliable data from parabolic trough solar collect... more An experimental facility for the acquisition of reliable data from parabolic trough solar collectors (PTCs) is established to develop a robust analytical model. The wide ranges of heat transfer fluid (HTF) flowrate (0.0372-0.1072 kg/s) and solar radiation (400-900 W/m2) are used to achieve PTC parameters such as the outlet temperature of HTF heat loss and temperature distribution. Vacuum conditions in the receiver are considered to be effective in terms of thermal efficiency. Also, three types of HTF including two oil fluids (Syltherm 800 and S2) and water were examined. The temperature distribution shows that when Syltherm or S2 passes through the absorber tube, the outlet temperature is higher than water: 2.84% for Syltherm and 3.72 % for S2. Since the absorber tube temperature is much higher than water, the heat loss in this condition is considered for oil HTF. Notables, the results show that using the vacuum tube can diminish heat loss for the oil HTF. The effect of solar intens...
هلاقم تاعلاطا هدیکچ ِلاقه لهاک یطٍّضپ :تفایرد 13 ید 1395 :شزیذپ 18 يوْت 1395 :تیاس رد ِئارا 41 ذٌ... more هلاقم تاعلاطا هدیکچ ِلاقه لهاک یطٍّضپ :تفایرد 13 ید 1395 :شزیذپ 18 يوْت 1395 :تیاس رد ِئارا 41 ذٌفسا 4931 طیحه بزخه تازثا تِ ِجَت ات تخَس فزصه یتسیس غتاٌه ٍ زتوک یگذٌیلاآ ات يیشگیاج تخَس باختًا یازت یرایست تاقیقحت ،یلیسف یاّ ِتسجزت سا یکی ىصٍرذیّ يیت يیا رد .تسا ُذض ماجًا راذیاپ ت تخَس يیز یه راوض ِت يیشگیاج یاّ ِصخطه ازیس دٍر ِیثض ىآ یقازتحا یاّ تخَس تِسد رد زگید فزط سا ٍ تسا یلیسف یاّ تخَس ی ِیثض تِ ِلاقه يیا رد .تسا تِفزگ رازق زیذپذیذجت ٍ کاپ یاّ لشید قازتحا یساس – تػزس رد ٍ لهاک رات تلاح رد يیگٌس لشید رَتَه رد ىصٍرذیّ 1600rpm ِصخطه ماوت .تسا ُذض تِخادزپ ِیٍاس ،تػزس زیظً رَتَه یاّ یِثض رد یدٍرٍ یصزًا ٍ صضاپ تذه ،صضاپ یه لشید ِت ىصٍرذیّ یصزًا ای مزج تثسً ،زیغته زتهاراپ .تسا ُذض ِتفزگ زظً رد تتاث یساس .ذضات سا لشید یدٍرٍ یصزًا تثسً ِت ىصٍرذیّ 0 ات )صلاخ لشید( % 70 ( % 70 دٍرٍ یصزًا % ٍ ىصٍرذیّ ی 30 يیهات لشید تخَس سا یصزًا % یه ِیثض جیاتً .تسا ُذض ُداد زییغت )دَض ُذٌیلاآ ،لشید یاج ِت ىصٍرذیّ یٌیشگیاج تلاح يیزتْت رد ِک تسا ىآ ُذٌّد ىاطً یساس یاّ ید ،ىصٍزتیً یاّذیسکا ِت ةیتزت ِت يت...
Dynamic optimization of solar‐wind hybrid system connected to electrical battery or hydrogen as an energy storage system
International Journal of Energy Research, 2021
Modeling and optimization of finless and finned tube heat recovery steam generators for cogeneration plants
Engineering Reports, 2020
IOP Conference Series: Materials Science and Engineering, 2020
To increase the capacity factor of a concentrated solar thermal power plant (CSTPP) beyond the ho... more To increase the capacity factor of a concentrated solar thermal power plant (CSTPP) beyond the hours of sunlight, the use of thermal energy storage systems (TES) can be a promising solution. Phase change materials (PCMs) can store latent thermal energy in the course of the melting process and release it when solar energy is not available. Generally, PCMs have low thermal conductivity. One of the most commercially promising solutions is the application of an extended heat transfer surface inside the PCM container. Moreover, the distance of the heat transfer fluid (HTF) to the core of the PCM in a TES system can affect the storage performance. Accordingly, a triplex tube heat exchanger with eight fins is considered in this paper, to investigate the impact of the different velocity of HTF and different entrance pattern in a vertical PCM container. Notably, the middle enclosure of the triplex tube is filled with PCM. Numerical analysis using an enthalpy porosity technique revealed that increasing HTF velocity reduces the charging time. Also, when the HTF enters from the bottom of the container, the storage time will diminish owing to a natural convection side-effect, but if the HTF flows downward, the amount of sensible thermal energy storage is higher than in the other cases.
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Papers by Rouhollah Ahmadi