Differences in heating effects of three personalized heating devices under various indoor temperatures: Table heating pad,cushion heating pad and leg heating pad
Restricted accessResearch articleFirst published online March, 2024
Differences in heating effects of three personalized heating devices under various indoor temperatures: Table heating pad,cushion heating pad and leg heating pad
The personalized environmental control system (PECS) meets the diverse comfort needs of occupants in an efficient way, amongst which, personalized heating systems have been extensively applied for heating in winter. Based on the differences in targeted body segments and application scenarios, the study of the heating performance and examining the applicability of different heating devices under various working conditions are necessary. In the present study, the heating effect of selected personalized heating devices including table heating pads, cushion heating pads and leg heating pads was investigated under different indoor temperatures (16°C, 18°C and 20°C). The results show that the cushion heating pads could produce the best heating effect in the environment at 16°C and 18°C. The average thermal comfort vote (TCV) was 0.00 and 1.08, respectively. While in the environment at 20°C, the leg heating pad (LH) was found to be the best with an average value of TCV to be 0.92. Personalized heating devices could directly enhance the thermal sensation and skin temperature of targeted body segments, such as the hands as well as legs, which are to be the most beneficial parts. The conclusions drawn above clarify the application scenarios of selected heating devices and will help to develop more energy-efficient heating schemes in winter.
ZhuWZhangZLiXFengWLiJ. Assessing the effects of technological progress on energy efficiency in the construction industry: a case of China. J Clean Prod2019; 238: 117908. DOI: 10.1016/j.jclepro.2019.117908.
2.
FengXLiaoCChengY. Experimental study on the supply air characteristics and thermal comfort of a novel personalized ventilation air terminal device. Indoor Built Environ2023; 32(6): 1269–1287. DOI: 10.1177/1420326X231159304.
3.
RawalRSchweikerMKazanciOBVardhanVJinQDuanmuL. Personal comfort systems: a review on comfort, energy, and economics. Energy Build2020; 214: 109858. DOI: 10.1016/j.enbuild.2020.109858.
4.
YangBLiZZhouBOlofssonTLiA. Enhanced effects of footwarmer by wearing sandals in winter office: a Swedish case study. Indoor Built Environ2021; 30(7): 875–885. DOI: 10.1177/1420326X20913975.
5.
VeselyMZeilerW. Personalized conditioning and its impact on thermal comfort and energy performance - a review. Renew Sustain Energy Rev2014; 34: 401–408. DOI: 10.1016/j.rser.2014.03.024.
6.
KazanciOBShinodaJYinHBogatuDWatanabeFKanekoYOlesenB. Development and initial testing of a personalized environmental control system (PECS). In: Proceedings of the CLIMA 2022 conference, Rotterdam, 22–25 May 2022, 49–56. DOI: 10.34641/clima.2022.239.
7.
DengQWangRLiYMiaoYZhaoJ. Human thermal sensation and comfort in a non-uniform environment with personalized heating. Sci Total Environ2017; 578: 242–248. DOI: 10.1016/j.scitotenv.2016.05.172.
8.
SongWZhangZChenZWangFYangB. Thermal comfort and energy performance of personal comfort systems (PCS): a systematic review and meta-analysis. Energy Build2022; 256: 111747. DOI: 10.1016/j.enbuild.2021.111747.
9.
MadsenTLSaxhofB. An unconventional method for reduction of the energy consumption for heating of buildings combined. Proceedings of the second international CIB symposium on energy conservation in the built environment: preprints: building service systems and automatic controls. Session 3 (page correction). Copenhagen: Technical University of Denmark, Department of Civil Engineering, 1977, pp. 31–43.
10.
ShahzadsHughesBCalautitJNasirD. Computational and field test analysis of thermal comfort performance of user-controlled thermal chair in an open plan office. Energy Proc2017; 105: 2635–2640. DOI: 10.1016/j.egypro.2017.03.761.
11.
PasutWZhangHArensEZhaiY. Energy-efficient comfort with a heated/cooled chair: results from human subject tests. Build Environ2015; 84: 10–21. DOI: 10.1016/j.buildenv.2014.10.026.
12.
ZhangHArensETaubMDickerhoffDBaumanFFountainMPasutWFannonDZhaiYPigmanM. Using footwarmers in offices for thermal comfort and energy savings. Energy Build2015; 104: 233–243. DOI: 10.1016/j.enbuild.2015.06.086.
13.
JiaCZhangZLiSGengXBieXWangM. Study on the effects of personal heated table mats on the comfort level of large office space heated by air-conditioner. Case Stud Therm Eng2023; 42: 102731. DOI: 10.1016/j.csite.2023.102731.
14.
UdayrajLiZKeYWangFYangB. A study of thermal comfort enhancement using three energy-efficient personalized heating strategies at two low indoor temperatures. Build Environ2018; 143: 1–14. DOI: 10.1016/j.buildenv.2018.06.049.
15.
HeYWangXLiNHeMHeD. Heating chair assisted by leg-warmer: a potential way to achieve better thermal comfort and greater energy conservation in winter. Energy Build2018; 158: 1106–1116. DOI: 10.1016/j.enbuild.2017.11.006.
16.
ZhangJZhouXLeiSLuoM. Energy and comfort performance of occupant-centric air conditioning strategy in office buildings with personal comfort devices. Build Simulat2022; 15: 899–911. DOI: 10.1007/s12273-021-0852-1.
17.
LuoMArensEZhangHGhahramaniAWangZ. Thermal comfort evaluated for combinations of energy-efficient personal heating and cooling devices. Build Environ2018; 143: 206–216. DOI: 10.1016/j.buildenv.2018.07.008.
18.
ZhangHArensEHuizengaCHanT. Thermal sensation and comfort models for non-uniform and transient environments, part II: local comfort of individual body parts. Build Environ2010; 45: 389–398. DOI: 10.1016/j.buildenv.2009.06.015.
19.
LuoWKramerRde KortYvan Marken LichtenbeltW. Effectiveness of personal comfort systems on whole-body thermal comfort – a systematic review on which body segments to target. Energy Build2022; 256: 111766. DOI: 10.1016/j.enbuild.2021.111766.
20.
ArensEZhangHHuizengaC. Partial- and whole-body thermal sensation and comfort - Part II: non-uniform environmental conditions. J Therm Biol2006; 31: 60–66, DOI: 10.1016/j.jtherbio.2005.11.027.
21.
ParkinsonTde DearR. Thermal pleasure in built environments: spatial alliesthesia from contact heating. Build Res Inf2016; 44(3): 248–262.
22.
TraylorCZhaoWTaoYX. Utilizing modulating-temperature setpoints to save energy and maintain alliesthesia-based comfort. Build Res Inf2019; 47(2): 190–201.
23.
ZhangH. Human thermal sensation and comfort in transient and non-uniform thermal environment. PhD thesis. Berkeley, CA: UC Berkeley, 2003.
24.
WangHXuMBianC. Experimental comparison of local direct heating to improve thermal comfort of workers. Build Environ2020; 177: 106884. DOI: 10.1016/j.buildenv.2020.106884.
25.
YangHCaoBZhuY. Study on the effects of chair heating in cold indoor environments from the perspective of local thermal sensation. Energy Build2018; 180: 16–28. DOI: 10.1016/j.enbuild.2018.09.003.
26.
NakamuraMYodaTCrawshawLIYasuharaSSaitoYKasugaMNagashimaKKanosueK. Regional differences in temperature sensation and thermal comfort in humans. J Appl Physiol2008; 105: 1897–1906. DOI: 10.1152/japplphysiol.90466.2008.
27.
LuoMWangZZhangHArensEFilingeriDJinLGhahramaniAChenWHeYSiB. High-density thermal sensitivity maps of the human body. Build Environ2020; 167: 106435. DOI: 10.1016/j.buildenv.2019.106435.
28.
GerrettNOuzzahraYColebySHobbsSRedortierBVoelckerTHavenithG. Thermal sensitivity to warmth during rest and exercise: a sex comparison. Eur J Appl Physiol2014; 114: 1451–1462. DOI: 10.1007/s00421-014-2875-0.
29.
LiuCTangYSunLZhangNGaoWYuanLShiJ. Effects of local heating of body on human thermal sensation and thermal comfort. J Build Eng2022; 53: 104543. DOI: 10.1016/j.jobe.2022.104543.
30.
GB 50736-2012. Design code for heating ventilation and air conditioning of civil buildings. Beijing: Standardization Administration of China (SAC), MOHURD, 2012.
31.
ANSI/ASHRAE 55-2020. Thermal environmental conditions for human occupancy. Atlanta: ASHRAE, 2021.
ChengYNiuJGaoN. Thermal comfort models: a review and numerical investigation. Build Environ2012; 47: 13–22. DOI: 10.1016/j.buildenv.2011.05.011.
34.
FilingeriDFournetDHodderSHavenithG. Body mapping of cutaneous wetness perception across the human torso during thermo-neutral and warm environmental exposures. J Appl Physiol2014; 117: 887–897. DOI: 10.1152/japplphysiol.00535.2014.
35.
HeZZhaoXYinYChenX. A local thermal sensation model suitable for thermal comfort evaluation of sensitive body segments. Sustain Cities Soc2023; 97: 104751. DOI: 10.1016/j.scs.2023.104751.
36.
ZhangHHuizengaCArensEWangD. Thermal sensation and comfort in transient non-uniform thermal environments. Eur J Appl Physiol2004; 92: 728–733. DOI: 10.1007/s00421-004-1137-y.
37.
YangHCaoBJuYZhuY. The effects of local cooling at different torso parts in improving body thermal comfort in hot indoor environments. Energy Build2019; 198: 528–541. DOI: 10.1016/j.enbuild.2019.06.004.
38.
WangYChangHLianZ. Evaluation of the feasibility of using skin temperature to predict overall thermal sensation in non-uniform thermal environments. J Therm Biol2022; 106: 103254. DOI: 10.1016/j.jtherbio.2022.103254.
39.
FangerPO. Thermal comfort: analysis and applications in environmental engineering. New York, NY: McGraw-Hill Book Company, 1970.
