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University students' cognitive performance under temperature cycles induced by direct load control events
1Indoor Environmental Quality Laboratory, Faculty of Architecture, Design and Planning, The University of Sydney, Sydney, NSW, Australia.
Indoor Air
|March 7, 2016
Summary
Direct load control (DLC) for air-conditioners in lecture halls may impact student learning. Cognitive performance remained stable or improved in mild conditions but declined in more extreme temperature fluctuations.
Area of Science:
- Environmental Science
- Cognitive Psychology
- Building Technology
Background:
- Direct load control (DLC) is a common strategy for managing peak electricity demand by cycling air-conditioner compressors.
- Implementing DLC in university lecture theaters can induce temperature fluctuations, potentially affecting students' learning performance.
- Understanding the impact of these thermal variations on cognitive functions is crucial for optimizing learning environments.
Purpose of the Study:
- To investigate the effects of DLC-induced temperature cycles on university students' cognitive performance.
- To assess the susceptibility of different cognitive skills (memory, concentration, reasoning, planning) to thermal variations.
- To determine the feasibility of DLC in university lecture theaters based on cognitive performance outcomes.
Main Methods:
- University students' cognitive performance was monitored under simulated DLC-induced temperature cycles and control conditions within a climate chamber.
- Two experiments were conducted with different cooling set point temperatures (22°C and 24°C) to simulate varying heat intensities and exposure durations.
- Cognitive skills including memory, concentration, reasoning, and planning were assessed to evaluate performance changes.
Main Results:
- In Experiment 1 (22°C set point), cognitive performance was stable or slightly enhanced by mild temperature cycles.
- In Experiment 2 (24°C set point), a trend of declining performance in reasoning and planning was observed under higher heat intensity and longer exposure.
- Simpler cognitive tasks showed less susceptibility to temperature effects than complex tasks, with performance remaining stable within a certain temperature range (extended-U relationship).
Conclusions:
- Direct load control appears feasible for university lecture theaters, provided DLC algorithms are carefully designed and implemented.
- The impact of thermal variations on cognitive performance is task-dependent, with complex cognitive functions being more sensitive.
- Judicious implementation of DLC strategies can mitigate negative effects on student learning and cognitive functions.
Keywords:
Cognitive performanceDirect load controlExtended-U relationshipLecture theatersPeak demandTemperature cyclesMore Related Videos
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