Education Commons^™

Assessment Of Walls With Phase Change Materials Through Synergistic And Performance Measures Using Experimental And Simulated Test Houses, Cory J. Enfield

ELAIA

Current research on living and working spaces continues to strive to identify the most energy-efficient methods for heating and cooling, and many novel technologies have emerged from the research. One of the most promising, and the topic of this quantitative analysis, is the retrofitting of phase change materials (PCMs) into the walls of structures. Research has shown positive results, such as a reduced transfer of heat through walls, when PCMs are retrofitted into wall construction. The present research takes previously gathered data from test houses, built with typical North American framing, and simulates an additional fourteen test houses from the …

Edalatpour Receives Nsf Career Award To Study Thermal Radiation In Quantum Materials And Quantum-Sized Distances, Marcus Wolf

General University of Maine Publications

Components the size of a few atoms, known as quantum materials, can enhance how technology functions and manages its heat. However, little is known about how heat is emitted and exchanged in quantum materials in contrast with their more common counterparts, three-dimensional bulk materials. Sheila Edalatpour, an assistant professor of mechanical engineering at the University of Maine, is studying how the emission of heat changes when the materials involved are quantum-sized, or when they are separated by a gap of the same size as one or multiple atoms.

Using Schema Training To Facilitate Students' Understanding Of Challenging Engineering Concepts In Heat Transfer And Thermodynamics, Dazhi Yang, Ruth Streveler, Ronald L. Miller, Inanc Senocak, Jim Slotta

Educational Technology Faculty Publications and Presentations

Background: Chi and colleagues have argued that some of the most challenging engineering concepts exhibit properties of emergent systems. However, students often lack a mental framework, or schema, for understanding emergence. Slotta and Chi posited that helping students develop a schema for emergent systems, referred to as schema training, would increase the understanding of challenging concepts exhibiting emergent properties.

Purpose: We tested the effectiveness of schema training and explored the nature of challenging concepts from thermodynamics and heat transfer. We investigated if schema training could (a) repair misconceptions in advanced engineering students and (b) prevent them in beginning engineering students. …

Development Of A Matlab Gui To Assist The Active Comprehension Of Biomedical Transport Phenomena Using A Visual Aid, Pranav Suri

Biomedical Engineering Undergraduate Honors Theses

Studies show that inductive teaching methods for Biomedical Transport Phenomena greatly benefit from an accompanying visual aid. The following project aimed to develop a MATLAB GUI application that illustrates steady-state heat transfer with a graph and heat map using user-defined boundary conditions and numerical parameters. The application was evaluated using a survey that first familiarized the user with the GUI by running through heat transfer exercises, then allowed the user to experiment with the application, and finally asked users about their experiences using a questionnaire. The responses indicate that the GUI was received positively overall, and that a MATLAB component …

Seventh-Grade Students' Use Of Heat Transfer Conceptions During An Engineering Design-Based Stem Integration Curriculum, Emilie A. Siverling, Tamara J. Moore

Integrated Engineering Department Publications

As the integration of STEM becomes increasingly important in pre-college education, it is important to study models of STEM integration. One model, engineering design-based STEM integration, has shown promising results in terms of student science content learning. This study’s purpose was to explore one student team’s use of heat transfer conceptions as they participated in an engineering design-based STEM integration curriculum. A case study research design, along with procedures from qualitative content analysis, were used to identify scientific and alternative conceptions that the seventh-grade students communicated during the unit. The main result is that the students spoke and wrote about …

Teaching Technical Engineering Courses From A Christian Perspective: Two Examples, Charles C. Adams

Pro Rege

Engineering professors, like those of the natural sciences, usually teach by breaking the subject matter into parts, that is, courses and activities that are logically abstract from each other. While together comprising a coherent whole, those individual parts too easily foster abstractionism, the view that such subjects as calculus, fluid mechanics, engineering design, and engineering ethics “really are” separable from one another. Such a view militates against a Christian perspective of engineering, technology, and reality in general by replacing the organic wholeness of life before the face of God with the compartmentalization that is characteristic of modern science and naturalism. …

Addressing Misconceptions About Heat Transfer In Undergraduate Chemical Engineering Instruction, Katharyn E. K. Nottis, Michael J. Prince, Margot A. Vigeant

Michael J. Prince

Understanding heat, energy and temperature can be difficult. Misconceptions about heat transfer have been found to persist, even after instruction. New instructional methods are needed to address them. This pilot study examined whether researcher-developed, inquiry-based activities could increase conceptual understanding of heat transfer. Twenty-two undergraduate chemical engineering students were assessed before and after instruction with inquiry-based activities. Participants had significantly higher scores on the post-test. An examination of assessment questions revealed substantial improvement on questions closely related to activities. However, participants had difficulty applying concepts in new and related contexts. Educational implications and suggestions for future research will be discussed.

Addressing Misconceptions About Heat Transfer In Undergraduate Chemical Engineering Instruction, Katharyn E. K. Nottis, Michael J. Prince, Margot A. Vigeant

Margot Vigeant

Understanding heat, energy and temperature can be difficult. Misconceptions about heat transfer have been found to persist, even after instruction. New instructional methods are needed to address them. This pilot study examined whether researcher-developed, inquiry-based activities could increase conceptual understanding of heat transfer. Twenty-two undergraduate chemical engineering students were assessed before and after instruction with inquiry-based activities. Participants had significantly higher scores on the post-test. An examination of assessment questions revealed substantial improvement on questions closely related to activities. However, participants had difficulty applying concepts in new and related contexts. Educational implications and suggestions for future research will be discussed.

Transferts De Chaleur Dans Un Réacteur Thermochimique Solaire Muni D’Un Récepteur Volumique Poreux, Hernando Romero Paredes Rubio

Hernando Romero Paredes Rubio

Un réacteur thermochimique solaire de 1 kW muni d’une structure céramique poreuse en céramique est modélisé pour simuler les transferts thermiques a l’intérieur du récepteur volumétrique. Le modèle développé a été utilisé pour prévoir le comportement thermique du réacteur en fonction des différentes conditions opératoires qui concernent le débit de gaz inerte, le flux solaire incident, la porosité, la longueur du récepteur, et la prise en compte de réactions chimiques. Les résultats montrent que la température maximale est de 1850K pour une concentration solaire de 1000 soleils. La température diminue de manière significative lorsque le débit de gaz augmente. Un …

Addressing Misconceptions About Heat Transfer In Undergraduate Chemical Engineering Instruction, Katharyn E. K. Nottis, Michael J. Prince, Margot A. Vigeant

NERA Conference Proceedings 2008

Understanding heat, energy and temperature can be difficult. Misconceptions about heat transfer have been found to persist, even after instruction. New instructional methods are needed to address them. This pilot study examined whether researcher-developed, inquiry-based activities could increase conceptual understanding of heat transfer. Twenty-two undergraduate chemical engineering students were assessed before and after instruction with inquiry-based activities. Participants had significantly higher scores on the post-test. An examination of assessment questions revealed substantial improvement on questions closely related to activities. However, participants had difficulty applying concepts in new and related contexts. Educational implications and suggestions for future research will be discussed.

Rb32-266 Cooling Milk On Nebraska Farms, P.A. Downs, E.B. Lewis

University of Nebraska-Lincoln Extension: Historical Materials

The desire of Nebraska people to continue the improvement of living conditions and to secure more healthful foods has been responsible for many changes in methods of caring for milk. One of the important factors in keeping milk sweet and of good quality is the process of cooling and keeping it cool until used. Three of these processes are as follows: placing containers of warm milk in any quantity of still water or still air at temperatures ranging from freezing to within a few degrees of the temperature of the milk, placing the containers in such positions that air or …