Developing an enhanced model for combined heat and air infiltration energy simulation

The need for efficient, sustainable, and planned utilization of resources is ever more critical. In the U.S. alone, buildings consume 34.8 Quadrillion (1015) BTU of energy annually at a cost of $1.4 Trillion. Of this energy 58% is utilized for heating and air conditioning. ^ Several building energy analysis tools have been developed to assess energy demands and lifecycle energy costs in buildings. Such analyses are also essential for an efficient HVAC design that overcomes the pitfalls of an under/over-designed system. DOE-2 is among the most widely known full building energy analysis models. It also constitutes the simulation engine of other prominent software such as eQUEST, EnergyPro, PowerDOE. Therefore, it is essential that DOE-2 energy simulations be characterized by high accuracy. ^ Infiltration is an uncontrolled process through which outside air leaks into a building. Studies have estimated infiltration to account for up to 50% of a building's energy demand. This, considered alongside the annual cost of buildings energy consumption, reveals the costs of air infiltration. It also stresses the need that prominent building energy simulation engines accurately account for its impact. ^ In this research the relative accuracy of current air infiltration calculation methods is evaluated against an intricate Multiphysics Hygrothermal CFD building envelope analysis. The full-scale CFD analysis is based on a meticulous representation of cracking in building envelopes and on real-life conditions. The research found that even the most advanced current infiltration methods, including in DOE-2, are at up to 96.13% relative error versus CFD analysis. ^ An Enhanced Model for Combined Heat and Air Infiltration Simulation was developed. The model resulted in 91.6% improvement in relative accuracy over current models. It reduces error versus CFD analysis to less than 4.5% while requiring less than 1% of the time required for such a complex hygrothermal analysis. The algorithm used in our model was demonstrated to be easy to integrate into DOE-2 and other engines as a standalone method for evaluating infiltration heat loads. This will vastly increase the accuracy of such simulation engines while maintaining their speed and ease of use characteristics that make them very widely used in building design.^

Challenging ESL Students to Avoid Plagiarism and Properly Summarize and Cite Articles

Research shows that plagiarism is a problem not only for English language learners but also for students whose first language is English. With the Internet and ease of copying and pasting information into a word document, plagiarism in on the rise (Maslen, 2003). Oftentimes, students are not aware they are doing something wrong. American students come into college with the cultural conditioning of knowing (perhaps not fully grasping) American academic standards (Gu & Brooks, 2007). International students have the additional disadvantage of not knowing the conventions, traditions, and values held in academic discourse (Gu & Brooks, 2007). Within American academic circles, plagiarism is considered “one of the worst crimes” a student can commit (Wheeler, 2008). However, outside the United States, plagiarism is culturally acceptable; in fact a moral transgression would be to not copy and paste the words of an expert (Wheeler, 2008). Most of the students in English for Academic Purposes (EAP) at Miami-Dade College are planning on continuing their education once they finish the EAP program so it is essential that they are exposed to the issue of plagiarism. A number of faculty who teach in subject areas have complained that incoming students do not have the skills needed to succeed; these skills include how to cite sources and reference material. As a result of this, the focus of this action research project was on incorporating and explaining plagiarism and providing a number of writing opportunities throughout the semester.