Consideration of solar heat impact into the calculation methods of heat energy needs
DOI:
https://doi.org/10.31548/energiya2021.02.026Abstract
Abstract. The issue of energy efficiency of buildings is now relevant for Ukraine, as the vast majority of them belong to the mass construction of the twentieth century. Efficient use of thermal energy presupposes the expediency of taking into account, in addition to heat loss, also additional heat inputs, among which - solar heat inputs to the building area. In some methods, this component is not taken into account, or is taken into account quite large.
A dynamic approach to the analysis of energy performance of buildings is given in the European standard EN ISO 13790, which was introduced in Ukraine in 2013, using the model 5R1C. But this method has not been widely used in Ukraine.
The aim of the study was to increase the efficiency of energy management of buildings by taking into account solar heat in their area in different methods and models.
The paper presents suggestions to amend the appliance of the heat load graph and math modeling for measuring energy consumption of the buildings. Amendments include forecasting that considers solar heat impact on the building. Work done based on the example of 5 floored apartment building. Authors of the paper made an analysis of the variability of climatic data using international hourly weather data for Kyiv. Comparative analysis of the three different methods of calculations of solar heat impact showed promising results: using heat load graph with consideration of solar heat impact allows to reduce the energy consumption allotted for heating by 37 % for North-South window orientation and by 28 % for West-East window orientation; using DSTU B A.2.2-12:2015 standard allows to achieve reduction by 11 % for North-South window orientation and by 9 % for West-East window orientation; using grid model 5R1C – 10 % for North-South window orientation, 8.5 % for West-East window orientation.
Key words: heat energy consumption, heat load graph, dynamic model, solar heat impact
References
Deshko, V., Shevchenko, O., Shovkaliyk, M. (2019). Approach to the energy evaluation of the social facilities of ukraine at the time of the energy‐efficiency measures implementation. Journal of New Technologies in Environmental Science (JNTES), 2, 55-75.
Deshko, V. I., Bilous, I. Yu. (2018). Mathematical models for determination of specific energy need for heating and cooling of the administrative building. International Journal of Engineering & Technology, 7 (4.3), 325-330.
https://doi.org/10.14419/ijet.v7i4.3.19826
Cowie, A., Hong, T., Feng, X., Darakdjian, Q. (2016). Usefulness of the obFMU Module Examined through a Review of Occupant Modelling Functionality in Building Performance Simulation Programs. Building Performance Simulation, 7, 1-22.
Иstergård, T., Jensen, R. L., Maagaard, S. E. (2018). A comparison of six metamodeling techniques applied to building performance simulations. Applied Energy, 211, 89-103.
https://doi.org/10.1016/j.apenergy.2017.10.102
Michalak, P. (2014). The simple hourly method of EN ISO 13790 standard in Matlab/Simulink: A comparative study for the climatic conditions of Poland. Energy, 75, 568-578.
https://doi.org/10.1016/j.energy.2014.08.019
Bruno, R., Oliveti, G., Arcuri, N. (2015). An analytical model for the evaluation of the correction factorFWof solar gains through glazed surfaces defined in EN ISO 13790. Energy and Buildings, 2015, 96, 1-19.
https://doi.org/10.1016/j.enbuild.2015.03.016
Jokisalo, J., Kurnitski, J. (2007). Performance of EN ISO 13790 utilisation factor heat demand calculation method in a cold climate. Energy and Buildings, 39, 236-247.
https://doi.org/10.1016/j.enbuild.2006.06.007
Orosa, J. A., Oliveira, A. C. (2010). Implementation of a method in EN ISO 13790 for calculating the utilisation factor taking into account different permeability levels of internal coverings. Energy and Buildings, 42, 598-604.
https://doi.org/10.1016/j.enbuild.2009.10.030
EN 13790:2008 (2008). Energy performance of buildings - Calculation of energy use for space heating and cooling, CEN: European Committee for Standardization, 53.
DSTU B A.2.2-12:2015. (2015). Enerhetychna efektyvnist' budivel'. Metod rozrakhunku enerhospozhyvannya pry opalenni, okholodzhenni, ventylyatsiyi, osvitlenni ta haryachomu vodopostachanni [Energy efficiency of buildings. Method of calculation of energy heating, cooling, ventilation, lighting and hot water]. Kyiv: MinrehionUkrayiny, 205.
International Weather for Energy Calculations. Available at: https://energyplus.net/weather-location/europe_wmo_region_6/UKR.
Downloads
Published
Issue
Section
License
Relationship between right holders and users shall be governed by the terms of the license Creative Commons Attribution – non-commercial – Distribution On Same Conditions 4.0 international (CC BY-NC-SA 4.0):https://creativecommons.org/licenses/by-nc-sa/4.0/deed.uk
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
