Annotated summary assignment

Jenkins, M. (2019). What is ASHRAE 55? Basics of Thermal Comfort | SimScale Blog. SimScale. Retrieved 7 November 2020, from https://www.simscale.com/blog/2019/08/what-is-ashrae-55-thermal-comfort/

This research blog uses ASHRAE 55 terminology to study thermal comfort and its contributing factors. The thermal comfort of each person is determined by how comfortable someone feels at a given temperature while performing a specific task. This blog provides useful information on how thermal comfort is rated by using the relation between the Predicted Mean Vote (PMV) and the Predicted Percentage of Dissatisfied (PPD). The PMV determines the thermal sensation of someone (+3: Hot, 0: Neutral, and -3: Cold), and the PDD is the percentage of how dissatisfied a person is in the given PMV value. In cases where the PMV is at the extreme ends (+3: Hot or -3: Cold), the PDD is usually at a high percentage.

This study provides information on several environmental factors that will affect one’s PMV like clothing, airspeed, metabolic rate, relative humidity, and the mean radiant temperature. Hence, the PMV value for each individual will be different despite sharing the same ambient temperature.

This research blog also provides the occupant load and space requirements under the standards of ASHRAE 55. To comply with ASHRAE 55’s standards, at least 80% of the occupants have to rate the PMV at the “Neutral” range (-0.5 to +0.5). To achieve such results, the ventilation systems, thermal control systems, and design of the building need to be well maintained.

With the relevant information on PMV and contributing factors as well as the ASHRAE 55 standard of optimal thermal comfort, this research blog has helped in our understanding of thermal comfort and aided us in the research of our project. With this knowledge, we can consider certain factors while conducting our own Thermal Sensation Vote survey.

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