66 research outputs found

    A Visual Method for Detailed Analysis of Building Life Cycle Assessment Results

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    In the environmental analysis of buildings, Life Cycle Assessment (LCA) is gaining more and more interest. It is due to the fact, that LCA is very comprehensive in considering many impacts in all life-cycle phases of the examined building. Since buildings have a complicated geometry that is built up with numerous constructions that consist of many materials, and the life-cycle includes many phases, the results of an assessment are likely to be difficult to analyze in detail. In this paper we introduce a visual method to help architects and analysts to quickly understand the results of an environmental assessment. It includes the hierarchic visualization of the performance of the individual elements of the building. Both energy use and environmental impacts can be presented. Also the contribution of the different life-cycle phases in the overall impact is visualized. There are increasing efforts nowadays to find the most efficient way to improve the environmental performance of buildings [1]. This can be supported with a detailed analysis of the results. The method is presented through a case study of a realized energy efficient one-family house

    TörtĂ©neti ablakok Ă©pĂŒletfizikai tulajdonsĂĄgai 3.: TermĂ©szetes filtrĂĄciĂł

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    ÁltalĂĄnos jelensĂ©g, hogy a hagyomĂĄnyos Ă©pĂ­tĂ©sƱ tĂĄrsashĂĄzi lakĂĄsok törtĂ©neti ablakait, ajtĂłit kibontjĂĄk Ă©s modern nyĂ­lĂĄszĂĄrĂłkra cserĂ©lik, ami utĂĄn a fƱtĂ©si idĂ©nyben penĂ©szesedni kezdenek a falak. A nagy lĂ©gzĂĄrĂĄsĂș modern nyĂ­lĂĄszĂĄrĂłk ugyanis nem tudjĂĄk azt a termĂ©szetes filtrĂĄciĂłt biztosĂ­tani, amit az ĂĄtlagos pĂĄraterhelĂ©sƱ, hagyomĂĄnyos szellƑzĂ©sƱ lakĂłterek megkövetelnek, Ă©s amit a törtĂ©neti nyĂ­lĂĄszĂĄrĂłk az ablakcsere elƑtt biztosĂ­tottak. Emiatt a lakĂłterek relatĂ­v nedvessĂ©gtartalma megnƑ, ami a hatĂĄrolĂł-szerkezetek belsƑ felĂŒletĂ©n kicsapĂłdik, ez pedig penĂ©szesedĂ©shez vezethet. CikkĂŒnk azt hivatott bemutatni, hogy a pallĂł- Ă©s gerĂ©btokos ablakok filtrĂĄciĂłs tulajdonsĂĄgaik miatt is igen fontosak a termĂ©szetes szellƑzĂ©sƱ, hagyomĂĄnyos lakóépĂŒletekben, modern nyĂ­lĂĄszĂĄrĂłkra valĂł cserĂ©jĂŒk vagy tĂșlzott tömĂ­tĂ©sĂŒk igen sĂșlyos pĂĄrĂĄsodĂĄsi problĂ©mĂĄk okozĂłja lehet

    Dinamikus paramĂ©terek az energiaigĂ©ny szĂĄmĂ­tĂĄsĂĄban. 1. rĂ©sz: NettĂł fƱtĂ©si energiaigĂ©ny avagy szorozzunk-e hasznosĂ­tĂĄsi tĂ©nyezƑvel?

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    This paper compares the calculation of heating energy need according to the Hungarian official methodology used for the certification of buildings and the seasonal method in the EN ISO 13790 standard. Both methods have a similar structure, but the Hungarian method contains several simplifications. A major simplification is that dynamic parameters in the utilisation of heat gains are not calculated, but the utilisation factors are fixed values for two categories of buildings (lightweight and heavyweight). This paper analyses the error as a result of this simplification on an example residential and office building. To increase the number of cases, a Monte Carlo analysis is performed with varying parameters of the geometry of the building, the orientation, thermal transmittance, window-to-wall ratio, shading and internal heat capacity. According to the results, the Hungarian methods consequently overestimates the heating energy need by 3–4 kWh/m2a on average, which is acceptable for conventional buildings. However, for very low energy buildings with high internal heat gains it is advisable to calculate the utilisation factors according to the 13790 standard, as in this range the Hungarian method may underestimate the energy need

    TörtĂ©neti ablakok hƑtechnikai tulajdonsĂĄgai 2.

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    A kannabinoidok hatåsai és hasznålatuk veszélyei

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    Az indiai kender (Cannabis sativa) fƑ hatĂłanyaga a THC, illet ve a szintetikus kannabinoidok az agy CB1 tĂ­pusĂș endocannabinoid receptorain fejtik ki hatĂĄsukat. A marihuĂĄna Ă©s a szintetikus kannabinoidok tartĂłs hasznĂĄlata fĂŒggƑsĂ©ghez vezethet, ennek ellenĂ©re a fiatalok körĂ©ben fogyasztĂĄsuk egyre nĂ©pszerƱbb, 2018-ban a felnƑtt nĂ©pessĂ©g 7,4%-a prĂłbĂĄlta ki a kannabiszt, Ă©s 1,9% a szintetikus kannabinoidokat. FƑleg a szintetikus kannabinoid fogyasztĂĄs terjed, 2018 vĂ©gĂ©re a cannabis utĂĄni negyedik helyrƑl mĂĄsodik helyre kerĂŒlt a felmĂ©rĂ©sek szerint (EMCCDA, 2018). A szintetikus kannabinoid termĂ©kekhez sokszor amfetamint, benzodiazepineket, ĂłpiĂĄtokat is kevernek, emiatt hatĂĄsuk kiszĂĄmĂ­thatatlan. A kannabisz Ă©s a kannabinoidok veszĂ©lyeit sokan alĂĄbecsĂŒlik, pedig a genetikai adottsĂĄgaik miatt skizofrĂ©niĂĄra hajlamos, illet ve a szociĂĄlis vagy pszichikai problĂ©mĂĄik elƑl szerhasznĂĄlatba menekĂŒlƑ fiatalok kĂŒlönösen veszĂ©lyeztetettek, a körĂŒkben vĂ©gzett prevenciĂł kiemelkedƑ jelentƑsĂ©gƱ lenne. ---- The main active substance of the plant Cannabis sativa is tetrahydrocannabinol ( THC). THC acts on endocannabinoid (CB1) receptors found in many brain areas. Several synthetic THC-like compounds are produced, they bound to CB1 receptor and mimic some of the effects of marijuana. Both marijuana and synthetic cannabinoid usage could lead to addiction. In spite of this, the consumption of them is growing among young people. Synthetic cannabinoid products are more dangerous than marijuana, their effect is usually unpredictable, because during their production, many other psychoactive substances are added to the synthetic cannabinoids, like amphetamine, opiates, benzodiazepins, to enhance their euphoric effect and addictivit y. Young people who use these substances because of their social or psychical problems and/or are genetically disposed to schizophrenia, are extremely endangered. That ’s why targeted prevention should be used in their case to reduce the harm connected with cannabinoid usage
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