AN UPDATED METHOD FOR HEATING CALCULATING IN BUILDINGS WITH INTERMITTENT HEATING

2021 ◽  
Vol 11 (2) ◽  
pp. 9-14
Author(s):  
Yuri S. VYTCHIKOV ◽  
Alexander A. CHULKOV ◽  
Vladislav A. GOLIKOV
Keyword(s):  
Energy Consumption ◽  
Thermal Insulation ◽  
Internal Surface ◽  
Living Room ◽  
Temperature Changes ◽  
Intermittent Heating

An updated method of heating calculation of buildings operated in the conditions of intermitt ent heating is considered. On the basis of the conducted studies, analytical dependences were obtained for determining energy consumption during heating of building enclosing structures, taking into account the infl uence of the order of location of thermal insulation and structural layers, as well as temperature changes during heating of each layer. Formulas for fi nding the change in the temperature of the internal air during the heating of the premises and the internal surface of the enclosing structures are obtained. On the basis of the proposed refi ned methodology, the calculation of the heating of the living room of a country cott age located on the territory of the Samara region was performed.

scholarly journals Energy-saving potential of intermittent heating system: Influence of composite phase change wall and optimization strategy

2020 ◽  
pp. 014459872096921
Author(s):  
Yanru Li ◽  
Enshen Long ◽  
Lili Zhang ◽  
Xiangyu Dong ◽  
Suo Wang
Keyword(s):  
Energy Consumption ◽  
Thermal Comfort ◽  
Phase Change ◽  
Air Temperature ◽  
Indoor Air ◽  
Thermal Environment ◽  
Optimization Strategy ◽  
Indoor Thermal Environment ◽  
Indoor Thermal Comfort ◽  
Intermittent Heating

In the Yangtze River zone of China, the heating operation in buildings is mainly part-time and part-space, which could affect the indoor thermal comfort while making the thermal process of building envelope different. This paper proposed to integrate phase change material (PCM) to building walls to increase the indoor thermal comfort and attenuate the temperature fluctuations during intermittent heating. The aim of this study is to investigate the influence of this kind of composite phase change wall (composite-PCW) on the indoor thermal environment and energy consumption of intermittent heating, and further develop an optimization strategy of intermittent heating operation by using EnergyPlus simulation. Results show that the indoor air temperature of the building with the composite-PCW was 2–3°C higher than the building with the reference wall (normal foamed concrete wall) during the heating-off process. Moreover, the indoor air temperature was higher than 18°C and the mean radiation temperature was above 20°C in the first 1 h after stopping heating. Under the optimized operation condition of turning off the heating device 1 h in advance, the heat release process of the composite-PCW to the indoor environment could maintain the indoor thermal environment within the comfortable range effectively. The composite-PCW could decrease 4.74% of the yearly heating energy consumption compared with the reference wall. The optimization described can provide useful information and guidance for the energy saving of intermittently heated buildings.

scholarly journals Determination of Optimum Envelope of Religious Buildings in Terms of Thermal Comfort and Energy Consumption: Mosque Cases

Energies ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6597
Author(s):  
Ahmet Bircan Atmaca ◽  
Gülay Zorer Gedik ◽  
Andreas Wagner
Keyword(s):  
Thermal Properties ◽  
Energy Consumption ◽  
Thermal Comfort ◽  
Thermal Insulation ◽  
Energy Savings ◽  
Gain Factor ◽  
Building Envelope ◽  
Comfort Level ◽  
Humid Climate ◽  
Savings Rate

Mosques are quite different from other building types in terms of occupant type and usage schedule. For this reason, they should be evaluated differently from other building types in terms of thermal comfort and energy consumption. It is difficult and probably not even necessary to create homogeneous thermal comfort in mosques’ entire usage area, which has large volumes and various areas for different activities. Nevertheless, energy consumption should be at a minimum level. In order to ensure that mosques are minimally affected by outdoor climatic changes, the improvement of the properties of the building envelope should have the highest priority. These optimal properties of the building envelope have to be in line with thermal comfort in mosques. The proposed method will be a guide for designers and occupants in the design process of new mosques or the use of existing mosques. The effect of the thermal properties of the building envelope on energy consumption was investigated to ensure optimum energy consumption together with an acceptable thermal comfort level. For this purpose, a parametric simulation study of the mosques was conducted by varying optical and thermal properties of the building envelope for a temperature humid climate zone. The simulation results were analyzed and evaluated according to current standards, and an appropriate envelope was determined. The results show that thermal insulation improvements in the roof dome of buildings with a large volume contributed more to energy savings than in walls and foundations. The use of double or triple glazing in transparent areas is an issue that should be considered together with the solar energy gain factor. Additionally, an increasing thickness of thermal insulation in the building envelope contributed positively to energy savings. However, the energy savings rate decreased after a certain thickness. The proposed building envelope achieved a 33% energy savings compared to the base scenario.

scholarly journals Structural Applications of Thermal Insulation Alkali Activated Materials with Reduced Graphene Oxide

Materials ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1052
Author(s):  
Wu-Jian Long ◽  
Can Lin ◽  
Xiao-Wen Tan ◽  
Jie-Lin Tao ◽  
Tao-Hua Ye ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Graphene Oxide ◽  
Energy Consumption ◽  
Reduced Graphene Oxide ◽  
Thermal Insulation ◽  
Expanded Polystyrene ◽  
Information Modeling ◽  
Reduced Graphene ◽  
Structural Applications ◽  
Alkali Activated

Development of low thermal conductivity and high strength building materials is an emerging strategy to solve the heavy energy consumption of buildings. This study develops sustainable alkali activated materials (AAMs) for structural members from waste expanded polystyrene (EPS) beads and reduced graphene oxide (rGO) to simultaneously meet the thermal insulation and mechanical requirements of building energy conservation. It was found that the thermal conductivity of AAMs with 80 vol.% EPS and 0.04 wt.% rGO (E8–G4) decreased by 74% compared to the AAMs without EPS and rGO (E0). The 28-day compressive and flexural strengths of E8–G4 increased by 29.8% and 26.5% with the addition of 80 vol.% EPS and 0.04 wt.% rGO, compared to the sample with 80 vol.% EPS without rGO (E8). In terms of compressive strength, thermal conductivity, and cost, the efficiency index of E8–G4 was higher than those of other materials. A building model made from AAMs was designed using building information modeling (BIM) tools to simulate energy consumption, and 31.78% of total energy consumption (including heating and cooling) was saved in the building operation period in Harbin City, China. Hence, AAMs made of waste EPS beads and rGO can realize the structural and functional integrated application in the future.

scholarly journals Influence of Thermal Insulation’s and Phase Change Material’s Insertion within a Partition Wall on the Energy Consumption of a Conditioned Room under Adjacent Local Periodical Temperature Effect

2020 ◽  
Vol 307 ◽  
pp. 01024
Author(s):  
Nisrine Hanchi ◽  
Hamid Hamza ◽  
Rabiaa Idmoussa ◽  
Jawad Lahjomri ◽  
Abdelaziz Oubarra
Keyword(s):  
Energy Consumption ◽  
Phase Change ◽  
Phase Change Material ◽  
Thermal Insulation ◽  
Phase Change Materials ◽  
Thermal Conditions ◽  
Thermal Activity ◽  
Partition Wall ◽  
Reduction Of Energy Consumption ◽  
Change Material

The aim of this work is to study the combined insertion effect of Phase Change Materials (PCM) and thermal insulation within a partition wall separating a conditioned room from an adjacent local which is under a periodic thermal activity. This is done by a comparative study with a reference wall under the same thermal conditions. The comparison criterion is the energy density transmitted to the local conditioned in established regime. The results show that the inclusion of thermal insulation and phase change material provides a significant reduction of energy consumption of the conditioned local; thereby a judicious choice of phase change material with thermal level and range melting temperature reduces further this reduction.

scholarly journals Automobile in the Disposition of Energy-Saving Houses

2014 ◽  
Vol 12 ◽  
pp. 158-163
Author(s):  
Josef Chybík
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Thermal Insulation ◽  
Open Space ◽  
Thermal Bridges ◽  
Structural Engineers ◽  
Thermal Relations

In the disposition of energetically economic houses, automobile abandons its stereotype held for so many years according to which it was placed to rest “under one roof” with other residential and utility rooms. However, this diagram shows a range of collisions manifesting with difficult building details, with occurrence of thermal bridges and thermal relations. This results in increased financial demands for drafting efficient thermal insulation layers or higher demand for energy consumption necessary to heat up the building. Generally, architects and structural engineers are not sufficiently aware of the fact that at the same time this is a factor that provides higher potential for faster ageing of car bodies and chassis when cars are parked “inside the house” than in means of transport parked in open carports or in an open space. This Paper deals with analyses of this important, yet often omitted or less-known fact.

Sustainability of ETICS Maintenance Technologies

2016 ◽  
Vol 820 ◽  
pp. 194-199 ◽  
Author(s):  
Katarína Minarovičová ◽  
Naďa Antošová
Keyword(s):  
Energy Consumption ◽  
Environmental Impacts ◽  
Thermal Insulation ◽  
Building Stock ◽  
Chemical Methods ◽  
Composite Systems ◽  
Starting Point ◽  
Reduction Of Energy Consumption

A strategy for the recovery of the building stock in Slovakia imposes obligations and proposals to provide additional investment for renovation with a view to 2020, aiming at further reduction of energy consumption of buildings and reducing the consumption of natural fuel resources. Maintenance of existing External Thermal Insulation Composite Systems (ETICS) remains without system solutions, using chemical methods for disposal of microorganisms. Environmental impacts at a price of current sociological needs are not known and detected. Principles of sustainability must be regarded as the starting point when applying the concept of ETICS maintenance.

THERMOTECHNICAL CALCULATION OF FLOORS ABOVE UNHEATED BASEMENT IN COTTAGE EXPLOITED UNDER INTERMITTENT HEATING CONDITIONS

2017 ◽  
Vol 7 (2) ◽  
pp. 27-31
Author(s):  
Alexander A. CHULKOV ◽  
Yury S. VYTCHIKOV ◽  
Mikhail Ye. SAPAREV
Keyword(s):  
Heat Transfer ◽  
Energy Consumption ◽  
Nonstationary Problem ◽  
Heating Time ◽  
Time Saving ◽  
Intermittent Heating ◽  
Calculation Results ◽  
Thermotechnical Calculation

The procedure of thermotechnical calculation of fl oor above unheated basement exploited under intermitt ent heating conditions is presented. Procedure in question is based on research of nonstationary problem of heat transfer through walling and takes into account thermo-inertial characteristics of walling materials. Through the example of fl oor above cottage basement is evaluated energy consumption and walling heating time in passing from stand-by mode to work mode with proposed procedure. Based on calculation results recommendations for energy and heating time saving are presented.

The Heating Energy Consumption Analysis and Energy Saving Transformation for the New Rural Apartment

2015 ◽  
Vol 744-746 ◽  
pp. 2318-2323
Author(s):  
Xiao Rui Liu ◽  
Shu Hui Xu ◽  
Yang Guo ◽  
Qing Ru Hao
Keyword(s):  
Energy Consumption ◽  
Comparative Analysis ◽  
Energy Saving ◽  
Thermal Insulation ◽  
North China ◽  
Present Situation ◽  
Energy Consumption Analysis ◽  
Before And After ◽  
Heating Energy Consumption

The main purpose of this test is to analysis heating energy consumption in new rural apartments in north china. At the first, we analysis the present situation of energy consumption and feature for new apartment in north china, then we proposed the measures to improve the performance of energy saving thermal insulation in new apartment in the area of north china, we conducted comparative analysis for energy consumption in new apartment before and after energy saving.

scholarly journals Design And Construction Problems Connected With Ensuring Even Thermal Insulation Of Single-Layer Walls

2015 ◽  
Vol 18 (3) ◽  
pp. 133-140
Author(s):  
Bohdan Stawiski
Keyword(s):  
Temperature Field ◽  
Thermal Insulation ◽  
Single Layer ◽  
Internal Surface ◽  
Temperature Factor ◽  
Design Solution ◽  
Design And Construction

Abstract The design of single-layer walls appears to be extremely simple. In the opinion of many designers, the additional insulation of tie beams and balconies continues to solve all problems. However, tests on single-layer walls show that the expressed opinion is not valid. The study quotes the results of tests on single-layer walls with strong signs of freezing. The conducted analysis of the design solution and calculation of the fRsi temperature factor on the internal surface and its comparison with fRsi determined empirically enabled reasons behind failure in the construction of the tested walls to be identified. The study presents problems connected with ensuring uniformity of the temperature field in walls, possibilities for detecting areas susceptible to the development of mold, and protection of partitions from the occurrence of this phenomenon by performing appropriate repair works preceding necessary renovations of the building which takes place after the occurrence of mold on walls and ceilings.

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