Mohammad Ahmadzadehtalatapeh
Department of Marine and Mechanical Engineering, Chabahar Maritime University, 99717-56499, Chabahar, Iran
[ 1 ] - Design and operation optimization of an air conditioning system through simulation: an hour-by-hour simulation study
In the present research, performance validation of a Heating, Ventilation, and Air Conditioning (HVAC) system operating in a library building was conducted. The operating HVAC system was studied in terms of the provided indoor air conditions and energy consumption level. The fieldwork measurements showed that the HVAC system is not capable of providing the desired indoor air conditions based on...
[ 2 ] - شبیه سازی عددی خزه های دریایی چسبیده به بدنه شناورها و بکارگیری روشهای کاربردی و نوین به منظور کاهش نیروی درگ ناشی از آنها
In this research, the effects of foulings on the outer surface of a marine vessel have been studied using the Computational Fluid Dynamics (CFD) methods. To this end, a proper turbulence model was considered and validated for the simulations. The simulation results for different fouling grades indicated that existing of a thin layer of slime could make 4.58 % increase in drag force; however, fo...
[ 3 ] - Application of Solar Thermal Collectors to Improve the Energy Performance of the Fresh Air HVAC Systems
In the preset study, the performance of a solar assisted heating, ventilation and air conditioning (HVAC) system in an operating theater building was studied. The yearly performances of the existing HVAC system and the system with the added solar collectors were simulated in terms of energy consumption and provided air conditions using a transient system simulation software (TRNSYS). In t...
[ 4 ] - A Review on the Drag Reduction Methods of the Ship Hulls for Improving the Hydrodynamic Performance
Hydrodynamic performance of a marine vessel mainly depends on the frictional and pressure resistance. Pressure drag reduction could be achieved by improving the shape of the vessels with implementation of modern hull forms. Hull forms optimization techniques could also be used for this purpose. Other techniques are needed to deal with the viscous portion of the total resistance, which is mainly...
[ 5 ] - تعیین دامنه حل محاسباتی متناظر با مشخصات هندسی پروانه دریایی با استفاده از روش عددی
در این تحقیق مدلسازی پروانه دریایی در فضای سه بعدی با استفاده از نرم افزار تجاری انسیس-فلوئنت انجام میگردد که تحلیل دینامیک سیالات برای دو نمونه از پروانه با مشخصات متفاوت از پروانه سری B و مدل استاندارد 3686 انجام شده است. در این تحقیق با در نظر گرفتن ضرایب بی بعد تراست ( )،گشتاور ( ) و راندمان( ) بر حسب ضریب پیشروی ( ) ، عملکرد پروانه مورد ارزیابی قرار گرفته است. با توجه به تحلیلهای انجام شده...
[ 6 ] - Performance Study of a Solar Integrated Central Heating System of a Residential Building Using Trnsys- an Hourly Simulation Model (RESEARCH NOTE)
In this investigation, the performance of an existing heating system of a residential building incorporated with an array of solar thermal collectors was studied. For this purpose, transient systems simulation program model was assembled to estimate the hour-by-hour performance of the existing and the system equipped with the solar thermal collectors in terms of the provided space air condition...
[ 7 ] - Fully Fresh Air Air-conditioning System Equipped with Double Heat Pipe Based Heat Recovery Technology
The using of double heat pipe based heat exchanger (HPHX) in a conventional fully fresh air air-conditioning (AC) system was examined in the present study. The fabricated HPHXs were tested under the actual conditions and the measured data were used to study the performance of the existing AC system (System A) and AC system equipped with the double HPHX (System B) for a yearly operation through ...
[ 8 ] - Energy Conservation Potential of the Heat Pipe Heat Exchangers: Experimental Study and Predictions
The energy conservation potential of the heat pipe based heat exchangers (HPHXs) was studied in this research. To this end, a typical climate chamber as the representative of an air conditioning system was established. The performance characteristic of a typical eight-row HPHX was obtained based on the one week operation (168 h) to determine the performance characteristic curves. The coil face ...
[ 9 ] - Application of Phase Change Material (PCM) for Cooling Load Reduction in Lightweight and Heavyweight Buildings: Case Study of a High Cooling Load Region of Iran
The application of phase change material (PCM) for energy conservation purposes in the residential buildings was investigated in the present study. Two types of building in terms of materials as the lightweight building (LWB) and heavyweight building (HWB) located in a high cooling load demanding region of Iran were considered for the study. Different types of PCM from organic and inorganic cat...
[ 10 ] - Passive Energy Air-to-Water Heat Pipe Based Heat Exchanger and its Potential of Air Pre-cooling in Air Conditioning Systems for Iran Climate
Air pre-cooling equipment is normally being employed in air-conditioning systems for pre-cooling the ambient outdoor air to enhance the air-conditioning systems performance. In this study, the potential of a passive water-to-air heat pipe based heat exchanger (HPHEX) for air pre-cooling purpose in air-conditioning systems for the high cooling load demanding regions of Iran was investigated. To ...
[ 11 ] - Determination of Optimum Insulation Thickness for Building Walls in Iran Using Life Cycle Cost Analysis
Air-Conditioning (AC) systems are responsible for a considerable portion of the energy consumption in buildings located in high cooling load requiring regions of Iran. In addition, the heat flow through the buildingschr('39') external walls plays a major role in cooling load estimations for the countrychr('39')s hot regions. Therefore, application of insulation materials in external walls has g...
Co-Authors