A5053737243- Advanced Sensor and Energy Harvesting Materials
- Conducting polymers and applications
- Energy Harvesting in Wireless Networks
- Innovative Energy Harvesting Technologies
- Textile materials and evaluations
- Infrared Thermography in Medicine
- Advanced Thermoelectric Materials and Devices
- Thermoregulation and physiological responses
- Tactile and Sensory Interactions
- Color perception and design
- Thermal Analysis in Power Transmission
- Heat Transfer and Optimization
- High voltage insulation and dielectric phenomena
- Material Properties and Applications
- Marine and environmental studies
- Radiative Heat Transfer Studies
- Consumer Perception and Purchasing Behavior
- Solidification and crystal growth phenomena
- Thermal Radiation and Cooling Technologies
- Metallurgical and Alloy Processes
- Electrospun Nanofibers in Biomedical Applications
- Thermal Regulation in Medicine
- Wireless Power Transfer Systems
- Recycling and Waste Management Techniques
- Digital Media and Visual Art
Riga Technical University
2014-2024
Materials Science & Engineering
2019
The present study reports the origin of surface charge on polymer upon triboelectrification and is a step forward towards development next generation mechanical energy harvesting systems.
Triboelectric nanogenerators based on ferroelectric materials exhibit boosted performance due to magnified induction by piezoelectric charges.
Generally, human thermal comfort depends on combinations of clothing structure and chemical nature fibers, external conditions factors related to wearer. Thermal a system is associated with balance body its thermoregulatory responses the dynamic interactions environment, can be quantified in terms Met Clo units. One important functions provide adequate for wellness high performance. To do this research, an integrated microclimate regulating electrical has been developed. The contains:...
Rise in use of mobile and wearable electronic devices increase the demand solutions to power these conveniently safely for humans environment. Harvesting human body energy is one perspective this problem. This paper studies performance harvesting waste heat using thermoelectrical generators. Generated form electricity not suitable direct by special converters have be used transform store electrical energy. Study analyzes three commercially available low voltage step-up conjunction with...
An energy-independent wearable electronic system is being researched, where the energy required for its operation obtained from human body movements and heat flow. The power source consists of an electromagnetic motion harvester (mass up to 70 g, peak reaching 38 mW depending on intensity movement), a thermoelectric 112 3 mW), converters storage capacitor. functional part temperature humidity sensors wireless data transmission module, while energy-aware management main function control...
In many smart textile development studies, sensors and electro-conductive yarns have been widely investigated used as essential components, especially in the fields of medicine, sport, work wear, special applications. Wearable provide a means to monitor wearer’s health through physiological measurements natural setting or are detect potential hazards alert users and/or caretakers. The aim research is develop prototype wearable electronics that consists high-performance clothing with an...
The paper presents results of Latvian distribution system operator Sadales tikls AS (ST) and Riga Technical University (RTU) joint research on possibilities to increase the permissible loading level operating MV cables in order improve efficiency existing network assets usage supply reliability. Permissible determination from heating point view is affected by many variable factors such as ambient environment, temperature, number configuration etc. To estimate temperature characteristics...
Thermoelectric cooling is a prospective technology that has lot of advantages; however, its main drawback low efficiency compared to other technologies. A scientific research aimed at the improvement thermoelectric cooling, including development new materials, innovative structures, and better power management strategies. The present work further explores self-developed recuperative approach, which takes advantage element’s ability as an electrical generator. This study relied on...
Electromagnetic human motion energy harvesters have shown good results previously. As the direct output of a harvester cannot be used for powering electronic devices, paper focuses on complete setup rectifier, ultra-low voltage converter and capacitor charger. The aim is to evaluate performance off-the-shelf elements modules electromagnetic harvester. Three commercially available converters were tested in controlled environment separately. best configuration obtained 4.9V less than 5 minutes...
The paper presents results of Latvian distribution system operator Sadales tikls AS (ST), Riga Technical University (RTU) and transmission Augstsprieguma (AS) joint research to determine the maximum permissible loading level five ST most used 10 kV 20 cable types development MV control methodology which includes achievable conductor temperature prediction model for n − 1 conditions (broken one network element). At laboratory type samples were protractedly loaded at a special test bed...