LoLo 2016: How many ways can you change a light bulb? Exploring methods in energy research - PowerPoint Presentation

LoLo 2016: How many ways can you change a light bulb? Exploring methods in energy research Regional differences in thermal comfort in a stratified heated environment Safwan Samsuddin PhD researcher Building Environment Engineering Loughborough University

Research AimTo understand the differences of acclimatized people from other non-cold regions in a heated indoor environment.

Research’s concept

AdaptationIs ASHRAE 1936 handbook Chapter 3 claimed on southern people sluggish in adaptability of indoor acclimatization applicable ? – ”It should be kept in mind that southern people, with their more sluggish heat production and lack of adaptability, will demand a comfort zone several degrees higher than those given here for the more active people of northern climates ” Olesen B.W and Parsons K.C, (2002) Introduction to thermal comfort standards and to the proposed new version of EN ISO 7730. Energy and Buildings, 34 6p: 537-548

Measurement Standard to followPosition of the sensors -seated– ASHRAE 55, 2010 (quantitative study)Questionnaire based on the 7 sensation scale for every 15 minutes interval for 2 hours (qualitative study) Room temperature, WHO and CIBSE GUIDE A and ASHRAE 55, 2010

Measuring EquipmentInnova Thermal Comfort Kit Squirrel data logger, U type thermistors U type Thermistor temperature sensorsSquirrel data logger Hobo RH% and Temperature sensors

Measurement: Test details

Measurement: Participant criteria

Building and heating criteria

The participants (hot climate)3 Malaysian, 1 Kuwait and 1 Nigerian came from a hot climate country. Figure 1.   World Map a t: http://www.worldatlas.com/

The participants (cold climate)6 British, 5 Greek, 1 Albanian, 5 Italian, 1 German and 2 from Eastern Central China came from a cold climate region. Figure 2 .   World Map a t: http://www.worldatlas.com/

The Data (March 2015/16) 208 votes 25 peoples 27 datasets 2 persons participated twice Average of 23.8 ° C indoor temperature Obtained from Loughborough University Metrological Department Weather Station Average of sessional outdoor temperature : 7.03 ° C Obtained from Measured air temperature by data loggers 18 hours of survey

Results (linear regression) Mean indoor temperature: 23.4 ° C Neutral Temperature: 22.14 ° C Date: March 2016 Mean outdoor temperature: 6.85 ° C Mean indoor temperature: 23.8 ° C Neutral Temperature: 23.13 °C Date: March 2015 and 2016 Mean outdoor temperature: 6.82 ° C

Griffiths’ comfort temperature Cold climate with mean temperature of 31.5 °C, SD = 7.7°CHot climate with mean temperature of : 29.1 ° C, SD = 5.96 ° C Tc = T + (4 - C) / a - (1) C = 0.9327*Top - 20.654 – Hot climate C = 0.1728*Top - 3.9971– Cold climate 1. Griffiths , I.D., (1990). Thermal comfort in buildings with passive solar features: Field studies. Report to the Commission of the European Communities. EN3S-090 UK: University of Surrey Guildford.

Conclusion Regression method is more near to the average room operative temperature. Thus, it is more applicable in this study to use regression result as the evidence. 1°C can saved about 8% of fuel consumption. (Carbon Trust:Heating Control.,2011) Thus people from hot climate country may save 8% of heating bills compared those in colder climate country in a UK house. People are more adapt into temperature when being at home with 22.14 °C – 23.13 °C Note: More data will be collected for the purpose of this study in the next coming Autumn.

Thank You Any Questions?