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Ergonomi och Aerosolteknologi

Designvetenskaper | Lunds Tekniska Högskola

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Termisk miljö

Det finns möjlighet att göra examensarbete vid Laboratoriet för termisk miljö. Vi har klimatkammare som kan simulera de flesta typer av klimat i vårt land (-50 ~ +60 ºC, 20 ~ 90 % RH). Vi har också instrument för att mäta bl a max VO2 och metoder för ergonomiska, arbets-, idrotts- och klimatfysiologiska undersökningar med försökspersoner. Det finns olika typer av termiska dockor (manikiner) som används för mätningar av isolation och vattenångmotstånd hos kläder, för utvärdering och design av komplexa miljöer utomhus, inomhus eller i fordon, och för produktutveckling, t ex personlig skyddsutrustning. En del av utrustningen passar också för fältundersökningar. 

Läs mer om vårt klimatlaboratorium här. 


Exjobb inom området: 

Evaluation and improvement of thermal work environment of welders

A new technology has been taken into use for welding large metal sheets in order to diminish tensions in materials. The metal sheets are heated to over 100 °C. That creates heat load and especially radiation load from front. The first jobs are done in open area while further tasks may be carried out in confined spaces. There is a need to evaluate welders thermal load and suggest measures to avoid heat stress.

Contact: Kalev Kuklane (kalev.kuklane@design.lth.se)

Sportswear design, thermal benefit and human performance:

Sweating is not the same in different parts of the body. Design of sportswear to match this variation may improve evaporative cooling and human performance in warm and hot environments during exercise and physical work. The project is to study thermal physiological benefits of different sportswear. 

Contact: Chuansi Gao (Chuansi.Gao@design.lth.se )

Personal cooling strategies when facing a hot climate:

The impact of heat waves due to climate change on society is predicted to be profound. It is necessary to prepare adaptation measures to such climate extremes. This study is part of an EU project to optimize personal cooling solutions to mitigate heat stress of workers.

Contact: Chuansi Gao (Chuansi.Gao@design.lth.se )

Estimation of metabolic rate under work in heat from heart rate and accelerometer data

Heart rate and metabolic rate have a well-established relationship. It is described in several publications and also in an international standard (ISO 8996). However, when heat or any other stress factor affects human then this relationship would not be valid as the stress influences heart rate. Depending on heat stress level, exposure time etc. the heart rate may be up to or even more than 40 beats/min higher than under the same activity at room temperature. Thus, a better method or a correction is needed. Today accelerometers and various step counters are used to estimate energy expenditure during various activities. In more advanced algorithms body weight and other parameters are taken into account to improve the accuracy of the estimations. However, the error can still be above 50 % in the worst case. Therefore, a study is needed where accelerometer data from various activities will be compared to the real metabolic rates relationship between them should be developed. The results would allow to estimate metabolic rate and thus body heat production under various extreme working conditions where real time metabolic rate measurements would not be possible and heart rate is affected by other stressors, e.g. firefighting.

Contact: Kalev Kuklane (kalev.kuklane@design.lth.se)

Influence of design factors on clothing insulation and evaporative resistance

International standard ISO 9920 defines methods to add up insulation values of single garments into the insulation of the whole clothing ensemble, and gives equations to estimate insulation reduction due to wind and motion. However, the methods do not consider different design of the clothing, layering, overlap, compression etc. and the estimation errors may reach above 30 %. In extreme environments and situations it may under- or overestimate critical exposure times leading to increased labour costs or increased risks for workers, respectively. Bringing the estimation errors down to 10 % would be acceptable. One specific study would test clothing items and systems for ambulance and hospital teams, and prepare algorithms for these. Another part of the study will focus on effects of specific clothing elements, e.g. by manipulating length of jacket, number and stiffness of layers.

Contact: Kalev Kuklane (kalev.kuklane@design.lth.se)

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