ENERGY EFFICIENCY IN BUILDINGS FOR SEASONAL USE. CASE STUDY

Autor/autori: AURORA IRINA DUMITRAȘCU*, CĂLIN GABRIEL CORDUBAN and IRINA BLIUC

Abstract: Within the international context related to sustainable development, architectural design should focus on compliance with the following requirements: adaptation to specific environmental conditions, optimizing resource consumption with respect to the destination of the building, using environmentally friendly materials and alternative energy sources. All these criteria apply also for buildings with seasonal exploitation, respectively summer houses, the specificity of the architectural program concerning mainly the distribution of energy demand throughout the year. The present paper analyses a summer house model, located on a slope near the town of Iasi, overviewing the Ciurbesti lake. In order to achieve a sustainable solution and taking into account the limited operational period, solar radiation is used both to ensure the hot water demand, with relatively low costs, and as an electricity source. Solar panels produce thermal power with low temperature degree, thus the system efficiency is on average about 50% for ensuring the hot water demand. Due to the equipment’s high costs, the system must be designed to be as efficient as possible. Therefore, it is of utmost importance the exposure optimization between the hours of maximum solar radiation intensity, by orienting the houses in compliance with the specific local conditions (Ozbalta et al., 2009). As a result to preliminary studies it was concluded that, for the Iasi city, the most favorable orientation is southward, with variations of no more than 20 degrees towards south and the roof solar panels tilting should be 30 degrees. Also, in order to avoid the overheating was designed a ventilated facade system. The whole architectural concept is subordinated to the idea of traditional reinterpretation, the roof’s slope and the ventilated facades patterns being site specific.

Keywords: renewable energy, ventilation systems, low energy demand

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