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You searched for +publisher:"University of North Texas" +contributor:("Rayegan, Rambod"). Showing records 1 – 3 of 3 total matches.

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University of North Texas

1. Hasib, Naimee. Performance Analysis of Two Alternative Hvac Systems for the Unt Zero Energy Lab.

Degree: 2013, University of North Texas

This paper covers the simulation and comparison among three different HVAC (heating, ventilation & air conditioning)systems to achieve the goal of finding the most effective HVAC among these three in terms of human comfort, efficiency and cost considering North Texas climate. In the Zero Energy Lab at the University of North Texas, Denton, TX, the HVAC system of the building assembles with geothermal heat source. Here, water to water heat pump with radiant floor and water to air heat pump with air ducts provide heating & cooling of the building. In this paper electricity consumption, comfort, cost & efficiency analysis is done for the existing system using Energy Plus simulation software. Calibration of the simulated data of the existing system is done comparing with the actual data. Actual data is measured using 150 sensors that installed in Zero Energy Lab. After the baseline model calibration, simulation for ground source water to water heat pump, evaporative cooler with baseboard electric heater and water cooled electric chiller with baseboard electric heater (as a conventional system) is shown. Simulation results evaluate the life cycle cost (LCC) for these HVAC systems. The results of the comparison analysis among all the three HVAC systems show the most effective HVAC system among these three systems in North Texas weather. The results will make UNT Zero Energy lab a standard model towards a sustainable green future. Advisors/Committee Members: Tao, Yong, Burzo, Mihai, Rayegan, Rambod.

Subjects/Keywords: HVAC; Energy Plus; WWHP

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Hasib, N. (2013). Performance Analysis of Two Alternative Hvac Systems for the Unt Zero Energy Lab. (Thesis). University of North Texas. Retrieved from https://digital.library.unt.edu/ark:/67531/metadc500201/

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Hasib, Naimee. “Performance Analysis of Two Alternative Hvac Systems for the Unt Zero Energy Lab.” 2013. Thesis, University of North Texas. Accessed July 21, 2019. https://digital.library.unt.edu/ark:/67531/metadc500201/.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Hasib, Naimee. “Performance Analysis of Two Alternative Hvac Systems for the Unt Zero Energy Lab.” 2013. Web. 21 Jul 2019.

Vancouver:

Hasib N. Performance Analysis of Two Alternative Hvac Systems for the Unt Zero Energy Lab. [Internet] [Thesis]. University of North Texas; 2013. [cited 2019 Jul 21]. Available from: https://digital.library.unt.edu/ark:/67531/metadc500201/.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Hasib N. Performance Analysis of Two Alternative Hvac Systems for the Unt Zero Energy Lab. [Thesis]. University of North Texas; 2013. Available from: https://digital.library.unt.edu/ark:/67531/metadc500201/

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


University of North Texas

2. Xiong, Guangyuan. Sensitivity and Uncertainty Analysis of Occupancy-related Parameters in Energy Modeling of Unt Zero Energy Lab.

Degree: 2013, University of North Texas

The study focuses on the sensitivity and uncertainty analysis of occupancy-related parameters using Energyplus modeling method. The model is based on a real building Zero Energy Lab in Discovery Park, at University of North Texas. Four categories of parameters are analyzed: heating/cooling setpoint, lighting, equipment and occupancy. Influence coefficient (IC) is applied in the sensitivity study, in order to compare the impact of individual parameter on the overall building energy consumption. The study is conducted under Texas weather file as well as North Dakota weather file in order to find weather’s influence of sensitivity. Probabilistic collocation method (PCM) is utilized for uncertainty analysis, with an aim of predicting future energy consumption based on history or reference data set. From the study, it is found that cooling setpoint has the largest influence on overall energy consumption in both Texas and North Dakota, and occupancy number has the least influence. The analysis also indicates schedule’s influence on energy consumption. PCM is able to accurately predict future energy consumption with limited calculation, and has great advantage over Monte Carlo Method. The polynomial equations are generated in both 3-order and 6-order, and the 6-order equation is proved to have a better result, which is around 0.1% compared with real value. Advisors/Committee Members: Tao, Yong X., Wan, Yan, Rayegan, Rambod.

Subjects/Keywords: Sensitivity; uncertainty; building energy; PCM

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Xiong, G. (2013). Sensitivity and Uncertainty Analysis of Occupancy-related Parameters in Energy Modeling of Unt Zero Energy Lab. (Thesis). University of North Texas. Retrieved from https://digital.library.unt.edu/ark:/67531/metadc499991/

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Xiong, Guangyuan. “Sensitivity and Uncertainty Analysis of Occupancy-related Parameters in Energy Modeling of Unt Zero Energy Lab.” 2013. Thesis, University of North Texas. Accessed July 21, 2019. https://digital.library.unt.edu/ark:/67531/metadc499991/.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Xiong, Guangyuan. “Sensitivity and Uncertainty Analysis of Occupancy-related Parameters in Energy Modeling of Unt Zero Energy Lab.” 2013. Web. 21 Jul 2019.

Vancouver:

Xiong G. Sensitivity and Uncertainty Analysis of Occupancy-related Parameters in Energy Modeling of Unt Zero Energy Lab. [Internet] [Thesis]. University of North Texas; 2013. [cited 2019 Jul 21]. Available from: https://digital.library.unt.edu/ark:/67531/metadc499991/.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Xiong G. Sensitivity and Uncertainty Analysis of Occupancy-related Parameters in Energy Modeling of Unt Zero Energy Lab. [Thesis]. University of North Texas; 2013. Available from: https://digital.library.unt.edu/ark:/67531/metadc499991/

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


University of North Texas

3. Hasib, A. M. M. Golam. Effect of Dispersed Particles and Branching on the Performance of a Medium Temperature Thermal Energy Storage System.

Degree: 2013, University of North Texas

The main objective of my thesis is to develop a numerical model for small-scale thermal energy storage system and to see the effect of dispersing nano-particles and using fractal-like branching heat exchanger in phase change material for our proposed thermal energy storage system. The associated research problems investigated for phase change material (PCM) are the low thermal conductivity and low rate of heat transfer from heat transfer fluid to PCM in thermal energy storage system. In this study an intensive study is carried out to find the best material for thermal storage and later on as a high conductive nano-particle graphite is used to enhance the effective thermal conductivity of the mixed materials. As a thermal storage material molten solar Salt (60% NaNO3+40%KNO3) has been selected, after that detailed numerical modeling of the proposed design has been done using MATLAB algorithm and following the fixed grid enthalpy method. The model is based on the numerical computation of 1-D finite difference method using explicit scheme. The second part of the study is based on enhancing the heat transfer performance by introducing the concept of fractal network or branching heat exchanger. Results from the numerical computation have been utilized for the comparison between a conventional heating system (with a simple single tube as a heat exchanger) and a passive PCM thermal energy storage system with branching heat exchanger using NTU-effectiveness method and charging time calculation. The comparison results show a significant amount improvement using branching network and mixing nano-particle in terms of heat transfer (13.5% increase in effectiveness of branching level-02 heat exchangers from the conventional one ), thermal conductivity (increased 73.6% with 20% graphite nano-particle mix with solid PCM), charging time (57% decrease of charging time for the effect of both the dispersion of Graphite nano-particle and branching heat exchange) and pressure drop (36% decrease in level-02 branching). The results of this study prove that the proposed medium temperature TES system coupled with solar ORC can be the stepping-stone for energy efficient and sustainable future in small-scale/building level as the system proves to be better in terms of enhanced heat transfer, increased thermal conductivity and reduced pumping power and overall sustainability. Advisors/Committee Members: Tao, Yong, Burzo, Mihai, Rayegan, Rambod.

Subjects/Keywords: Energy storage; branching; dispersed particles

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Hasib, A. M. M. G. (2013). Effect of Dispersed Particles and Branching on the Performance of a Medium Temperature Thermal Energy Storage System. (Thesis). University of North Texas. Retrieved from https://digital.library.unt.edu/ark:/67531/metadc499995/

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Hasib, A M M Golam. “Effect of Dispersed Particles and Branching on the Performance of a Medium Temperature Thermal Energy Storage System.” 2013. Thesis, University of North Texas. Accessed July 21, 2019. https://digital.library.unt.edu/ark:/67531/metadc499995/.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Hasib, A M M Golam. “Effect of Dispersed Particles and Branching on the Performance of a Medium Temperature Thermal Energy Storage System.” 2013. Web. 21 Jul 2019.

Vancouver:

Hasib AMMG. Effect of Dispersed Particles and Branching on the Performance of a Medium Temperature Thermal Energy Storage System. [Internet] [Thesis]. University of North Texas; 2013. [cited 2019 Jul 21]. Available from: https://digital.library.unt.edu/ark:/67531/metadc499995/.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Hasib AMMG. Effect of Dispersed Particles and Branching on the Performance of a Medium Temperature Thermal Energy Storage System. [Thesis]. University of North Texas; 2013. Available from: https://digital.library.unt.edu/ark:/67531/metadc499995/

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

.