Aspects of Heat Supply Security Management Using Elements of Decision Theory

The method of the stochastic Markov process used for the analysis of operation of a training aircraft-Cessna 150 was presented in the article. In this article, the time changing probability of readiness was determined on the basis of knowledge of the current aircraft operation. Markov stochastic processes have been used as a model to determine aircraft-Cessna 150 readiness for specific tasks. In order to determine the readiness, the probability of being in one of the investigated states is determined. The analysed states included: standby, pre-flight service, flight, interstate service, after-flight service and hangar service.

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“…, t n−2 . The Markov process is therefore fully characterized by the conditional distribution [11][12][13]:…”

Section: Calculation Methodology 21 Markov Chainsmentioning

confidence: 99%

Analysis of the operation process of a training aircraft-Cessna 150

et al. 2019

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“…Energy consumption depends on many external factors, such as climatic conditions, the method of using solar energy, etc. The applied construction and material solutions of building partitions also play an important role, affecting the dynamics of heat transfer [14] and the types and functioning of energy saving installations in the building, as well as the appropriate management of the heat supply [15].…”

Section: Introductionmentioning

confidence: 99%

Multi-Aspect Shaping of the Building’s Heat Balance

Starakiewicz,

Miąsik,

Krasoń

et al. 2024

Energies

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In the European Union, buildings account for 42% of the energy consumption and 36% of the direct and indirect energy-related greenhouse gas emissions. Reducing thermal power for heating purposes is crucial to achieve climate neutrality. The main purpose of this article is to identify the places in the building where it is possible to significantly improve energy efficiency through the use of appropriate construction and material solutions. This article contains a multi-aspect approach to the heat balance of a building. Solutions that have a direct impact on building energy consumption were analysed, taking into account architectural, technological, and material aspects. Particular attention was paid to energy-efficient design and material solutions for non-transparent and transparent external walls and thermal storage walls (Trombe walls). An analysis of heat transfer through building elements was carried out, along with the optimisation of energy-efficient solutions for non-transparent and transparent barriers. Two methods for determining the equivalent heat transfer coefficient Ue for solar active partitions are presented. The analysis presented in the work using the original method of the balanced heat transfer coefficient Ue is a testing ground for identifying unfavourable features of the building structure, as well as the most energy-efficient solutions that can be used in establishing standards for the construction and modernisation of buildings. The value of the Ue coefficient illustrates the actual heat transfer through the partition. Having Ue values for various structural solutions of building envelopes, the designer can easily select the most effective ones. The use of the presented methodology will allow for the optimisation of technical solutions for building elements to improve its energy efficiency.

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“…The Union is committed to efforts to develop a sustainable, competitive, safe and low-carbon energy system while maintaining the security of heat and energy supplies. In the context of infrastructure responsible for ensuring the security of heat supply, an important issue is its assessment in the aspect of supply security, taking into account economic and environmental conditions, presented in the paper [10]. The results of energy saving calculations may be of interest for the investors, engineers, and policy makers who intend to minimize the difference between the planned and real energy savings analyzed in the paper [11].…”

Section: Introductionmentioning

confidence: 99%

Introduction to the Dynamics of Heat Transfer in Buildings

Babiarz

Szymanski²

2020

Energies

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Changing climatic conditions cause the variability of the parameters of the building’s surroundings, which in turn causes both the gains and losses of heat to change over time. There is variability in both daily and annual cycles. Meeting the requirements of thermal comfort in rooms requires maintaining the required parameters, including constant temperature. Heat gains and losses must be balanced, and this balance is ensured through appropriate heating systems. At the same time, the above means that the demand for heating buildings is not constant but depends on external weather conditions and the energy efficiency of the building. This, in turn, affects the thermal inertia, causing changes in the partition temperature to occur slower than the changes in air temperature. Therefore, the amplitude of the heating power changes is not proportional to the amplitude of the outside air temperature change. The paper presents an example of the analysis of thermal dynamics in buildings. Various aspects of heat transfer in the building were investigated taking into account the transient conditions. The variability of temperature over time at different depths of the partition was analysed, showing the results graphically. The periodic variability of the outside air temperature and the intensity of solar radiation were described by the Fourier series. Moreover, the article shows the influence of the thermal insulation thickness of the external wall on the annual amplitude of temperature changes and on the duration of the heating season, which is important from the point of view of optimization.

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Aspects of Heat Supply Security Management Using Elements of Decision Theory

Cited by 9 publications

References 40 publications

Analysis of the operation process of a training aircraft-Cessna 150

Analysis of the operation process of a training aircraft-Cessna 150

Multi-Aspect Shaping of the Building’s Heat Balance

Introduction to the Dynamics of Heat Transfer in Buildings

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