Mathcad Functions For The Thermodynamic Properties Of Moist Air, Ammonia, Propane, And R 22

McClain, Stephen T.; Smitherman, Christopher

doi:10.18260/1-2--1924

Cited by 1 publication

(2 citation statements)

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“…The outdoor air (or fresh air) requirements depend on the type of building and the occupants. For example, for an office building with an occupancy of seven people per 1000ft 2 (100m 2 ), it is recommended a minimum outdoor airflow rate per person of 20ft 3 /min (10L/s). On the other hand, for an educational facility with an occupancy of fifty people per 1000ft 2 (100m 2 ), it is recommended a minimum outdoor airflow rate per person of 15ft 3 /min (7.5L/s).…”

Section: Discussionmentioning

confidence: 99%

“…2 A similar approach has been used by McClain and Smitherman. 3 They developed Mathcad functions to evaluate the thermodynamic properties of moist air, as well as ammonia, propane and Refrigerant 22. Typical psychrometric processes in buildings are covered using psychrometric formulations and the psychrometric chart, and the computations i.e.…”

Section: Introductionmentioning

confidence: 99%

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Use of Computational Tools to Enhance the Study of Psychrometric Processes for Buildings in an Air Conditioning Course

Mago

Luck

2014

International Journal of Mechanical Engineering Education

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The use of computational tools such as Mathcad or Microsoft Excel to enhance the students' understanding of the physics behind psychrometric processes in buildings in an air conditioning technical elective course is explored in this paper. By utilizing Mathcad and/or Excel, students can be taught to create a set of psychrometric-related functions that can greatly diminish the number of calculations required to tackle design-oriented problems. By doing this, two levels of conceptual understanding are enhanced. First, students gain an appreciation of the basic psychrometric processes for buildings when creating specific functions in Mathcad/Excel, and second, students gain the ability to create automated worksheets for specific applications, allowing them to see immediate results to variations in input design conditions, as well as on different parameters. Feedback from students, as well as class instructors, demonstrates that the use of these tools enhance the student experience in an air conditioning class and make the course more dynamic and engaging.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%