What is it about?
In designing energy-saving heating systems, it is important to have the exact values of heating loads and seasonal heating demands of buildings. The existing methods for determining these values are not exact enough, because they do not take into account important factors such as the impact of solar radiation on south walls’ and roofs’ surfaces, the significant difference between day and night outside temperatures, and these temperatures’ duration during the heating season. Apart from the stated disadvantage, the existing methods do not take into account the fact that each building has its own duration-of-heating period. The mentioned imperfections do not allow for providing the exact values of heating demands, which may cause the use of wrong solutions in the designing of heat supply systems. In this entry, new and improved methods are presented for more precise solution of heating problems.
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Why is it important?
This entry was prepared based on summarizing the results of a research work, accomplished by the author, within a program of heating efficiency. For providing energy and fuel savings in heating systems, first the exact values of heating loads of buildings are needed. The use of the developed method provides the best possible accuracy in heating-loads value, as it takes into account the impact of more factors. Particularly, this entry highlights that depending on the thermal properties of buildings’ envelopes, the duration-of-heating season for each building is different, even in the same climatic conditions. The proposed method is designed for heating experts and it can be used by students.
Perspectives
1 The suggested methods in this entry can be applied for accurate calculation of seasonal heating demands of any kind of building that possess any combination of thermal and physical properties of constructions in any climatic conditions. For this purpose, it is necessary to conduct climatologic investigations and develop empirical equations for determining the total duration of current daytime and nighttime temperatures in given climatic conditions. 2. Each building has its own heating season’s beginning temperature, regardless of climatic conditions. The same building in various climatic conditions has the same heating season starting temperature, but the heating season period of a building depends on the total duration of temperatures having values between the heating season starting temperature and the heating design temperature in a given area. 3. The accurate values of seasonal specific heating demands allow determining and planning accurate values of fuel consumption for heating purposes.
Professor Zohrab Melikyan
NATIONAL UNIVERSITY OF ARCHITECTURE AND CONSTRUCTION OF ARMENIA
Read the Original
This page is a summary of: Residential Buildings, July 2007, Taylor & Francis,
DOI: 10.1201/9780849338960.ch148.
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