scholarly journals The integration of selected technology to energy activated ETICS - theoretical approach

2020 ◽  
Vol 172 ◽  
pp. 21004
Author(s):  
Dariusz Heim ◽  
Ivan Chodak ◽  
Simo Ilomets ◽  
Dominika Knera ◽  
Anna Wieprzkowicz ◽  
...  
Keyword(s):  
Thermal Insulation ◽  
Phase Change Materials ◽  
Composite System ◽  
Material Selection ◽  
Complete Solution ◽  
High Heat ◽  
Functional Material ◽  
Basic Principles ◽  
High Heat Capacity ◽  
Initial Concept

The main goal of this study is to develop the new external thermal insulation composite system (ETICS) by integration of flexible photovoltaic (FPV) and encapsulated phase change materials (PCM). This work is the first step of the international project En-ActivETICS and concerns mainly material selection and systems integration issues. The paper presents a complete solution of façade component which integrates thermal insulation, heat storage and electricity generation - En-ActivETICS that combines ETICS technology with a self-supporting flexible photovoltaic elements. This system will be applicable for both masonry or concrete constructions and it is a new step in the development of building facade technology allowing to achieve a component classified to the group of functional material. In the paper, the formulation of basic principles of En-ActivETICS as well as an overview of existing materials and technologies is presented. Finally, the initial concept of the system is described. The main features of that system is using an elastic, high heat capacity and frost resistant adhesive joining flexible PV with thermal insulation.

ENERGY AND FEASIBILITY ANALYSIS OF APPLYING BIO-BASED PHASE CHANGE MATERIALS TO BUILDINGS IN EAST ASIA

2020 ◽  
Vol 15 (2) ◽  
pp. 157-181
Author(s):  
Abdo Abdullah Ahmed Gassar ◽  
Geun Young Yun ◽  
Sumin Kim ◽  
Choong-Hee Han
Keyword(s):  
Phase Change ◽  
East Asia ◽  
Melting Temperature ◽  
Phase Change Materials ◽  
Computer Modelling ◽  
High Heat ◽  
Economic Feasibility ◽  
Key Factor ◽  
High Heat Capacity ◽  
Phase Temperature

ABSTRACT The application of phase change materials (PCMs) in building envelopes can help promote energy efficiency due to its high heat capacity. Our study aimed to provide energy and economic insights for deploying PCM to buildings in eight different regions of East Asia through a series of energy and economic analysis using computer modelling and simulations. The static payback period (SPP) and dynamic payback (DPP) methods were used to evaluate the economic feasibility of applying a PCM at different melting phase temperatures (20°C, 23°C, 25°C, 27°C and 29°C). Results show that the proper choice of a PCM melting temperature is a key factor to improve the performance of the PCM applied to buildings. A melting phase temperature of 29°C achieved the highest economic feasibility in Seoul, Tokyo; Pyongyang; Beijing; and Ulaanbaatar and a melting temperature of 23°C in Hong Kong had the highest economic feasibility. Overall, the combined economic and energy analysis presented in this study can play an important role in improving the energy and economic feasibility of PCM in buildings.

scholarly journals Model of fire spread out on outer building surface

2015 ◽  
Vol 63 (1) ◽  
pp. 135-144
Author(s):  
A. Kolbrecki
Keyword(s):  
Thermal Insulation ◽  
Composite System ◽  
Fire Spread ◽  
Structural Barriers ◽  
Compartment Fires ◽  
Adjacent Buildings ◽  
Double Skin ◽  
Glazed Facade ◽  
Side Walls

Abstract The spread of fire through the façades is one of the quickest routes of spreading flames in buildings. There are three situations that can lead to the spread of fire though the façades: a) Fire from outside through hot coals, initialized/set either by a fire in a nearby building or a wooden area in flames, b) Fire started/set by an element that burns in the front of the façade (garbage container, furniture, etc.), c) Fire originated in a compartment of the building, which spreads outwards through the windows. In this paper, I focus only at the last case, which is considered to be the most dangerous and statistically the most frequently occurring. Fire spread of some type of façades were discussed: • Glazed façade, • Double-skin façade, • Façade with structural barriers, • Façade with side walls at the opening, • Façades covered by ETICS (External Thermal Insulation Composite System). Also information of influence of radiation from compartment fires to adjacent buildings was added.

Preparation and Properties of Phase Change Thermal Insulation Materials

2018 ◽  
Vol 281 ◽  
pp. 131-136
Author(s):  
Shi Chao Zhang ◽  
Wei Wu ◽  
Yu Feng Chen ◽  
Liu Shi Tao ◽  
Kai Fang ◽  
...  
Keyword(s):  
Phase Change ◽  
Thermal Insulation ◽  
Calcium Silicate ◽  
Phase Change Materials ◽  
Performance Test ◽  
Thermal Protection ◽  
Insulation Material ◽  
Insulation Materials ◽  
Short Time ◽  
Change Material

With the increase of the speed of vehicle, the thermal protection system of its powerplant requires higher insulation materials. Phase change materials can absorb large amounts of heat in short time. So the introduction of phase change materials in thermal insulation materials can achieve efficient insulation in a limited space for a short time. In this paper, a new phase change thermal insulation material was prepared by pressure molding with microporous calcium silicate as matrix and Li2CO3 as phase change material. The morphology stability, exudation and heat insulation of the materials were tested. The results show that the porous structure of microporous calcium silicate has a good encapsulation when the phase transition of Li2CO3 is changed into liquid. And the material has no leakage during use. The thermal performance test also shows that the insulation performance of the material has obvious advantages in the short term application.

Safety Issues Concerning Robotic Welding of Large Elements

2015 ◽  
Vol 220-221 ◽  
pp. 818-823 ◽  
Author(s):  
Wojciech J. Klimasara ◽  
Zbigniew Pilat ◽  
Marcin Słowikowski
Keyword(s):  
Risk Factors ◽  
Health Risks ◽  
Occupational Safety ◽  
High Heat ◽  
Robotic Welding ◽  
European Directives ◽  
Safety Issues ◽  
Safety Regulations ◽  
High Heat Capacity ◽  
Welding Processes

Robotic welding of large elements poses significant difficulties regarding the technological process, robot functions and the safety of the operator and other people. The health risks involved arise out of the weight of elements, high heat capacity, harmful gases and fumes. Under the Eureka project, the PIAP team is developing a model of a robotized cell designed mainly for welding large elements. Occupational safety is of paramount importance and hence is a constructive discussion on occupational health risk factors. The replacement of human workers with robots on assembly nests, especially in SMEs, eliminates the exposure of workers to hazard, but is focused on a reduction in employment rather than in significant improvements to the workplace. The paper analyzes and discusses European safety regulations contained in the European directives and applicable EN standards. Appropriate safety programs of diverse welding processes and materials to be implemented by designers and suppliers of robotic welding stations and lines, as well as by the users thereof, will be indicated.

scholarly journals Effects of sleep on a high-heat capacity mattress on sleep stages, EEG power spectra, cardiac interbeat intervals and body temperatures in healthy middle-aged men‡

SLEEP ◽  
2019 ◽  
Vol 43 (5) ◽  
Author(s):  
Sebastian Herberger ◽  
Kurt Kräuchi ◽  
Martin Glos ◽  
Katharina Lederer ◽  
Lisa Assmus ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heat Capacity ◽  
Body Temperature ◽  
Wave Energy ◽  
Sleep Stage ◽  
High Heat ◽  
Body Temperatures ◽  
High Heat Capacity ◽  
Eeg Power ◽  
Core Body

Abstract Study Objectives This study deals with the question whether a slow (non-disturbing) reduction of core body temperature (CBT) during sleep increases sleep stage N3 and EEG slow wave energy (SWE) and leads to a slowing of heart rate in humans. Participants Thirty-two healthy male subjects with a mean ± SD age 46 ± 4 years and body mass index 25.2 ± 1.8 kg/m2. Methods A high-heat capacity mattress (HM) was used to lower body temperatures in sleep and was compared to a conventional low-heat capacity mattress (LM) in a double-blinded fashion. Polysomnography was performed accompanied by measurements of skin-, core body- and mattress surface-temperatures, and heart rate. EEG power spectral analyses were carried out using Fast Fourier Transform. Interbeat intervals were derived from the electrocardiogram. Results The HM led to a larger decline in CBT, mediated through higher heat conduction from the core via the proximal back skin onto the mattress together with reduced heart rate. These effects occurred together with a significant increase in sleep stage N3 and standardized slow wave energy (sSWE, 0.791–4.297 Hz) accumulated in NREM sleep. In the 2nd half of the night sSWE increase was significantly correlated with body temperature changes, for example with CBT decline in the same phase. Conclusions A HM subtly decreases CBT, leading to an increased amount of sleep stage N3 and of sSWE, as well as a slowing of heart rate.

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