Transient Energy Models of Housing Facilities Operation

2021 ◽  
Vol 23 ◽  
pp. 539-551
Author(s):  
Valeriі Deshko ◽  
Inna Bilous ◽  
Dmytro Biriukov ◽  
Olena Yatsenko
Keyword(s):  
Energy Consumption ◽  
Heating System ◽  
Operating Conditions ◽  
Energy Resources ◽  
Climate Data ◽  
Software Environment ◽  
Heating Systems ◽  
Energy Models ◽  
Total Energy Balance ◽  
The City

Buildings are the main consumer of energy resources in the total energy balance of the countries in Central and Eastern Europe, the main energy consumption is allocated for heating. Efficient use of energy resources for heating needs to a large extent depends on the efficiency of regulation of heating systems. In the article, dynamic mathematical models of a two-room typical apartment in Ukraine, built in 2016, were developed in Matlab and EnergyPlus software environment. The simulations were carried out using IWEC hourly climate data for the city of Kyiv. The results of simulations of thermal energy consumption in Matlab are characterized by a larger range of fluctuations of the heating system load, which is typical for the real operating conditions of the system with the controller of ON/OFF type. In EnergyPlus it is assumed that the gas boiler operates continuously in the ON mode. In the research, the change of load on the apartment heating system was studied at different numbers and locations of air temperature control sensors installation, according to which the controller of the autonomous gas boiler operates.

The Impact of Electric Hybrid Compressor to Make Transport Environmentally Friendly

2013 ◽  
Vol 391 ◽  
pp. 207-212
Author(s):  
Maciej Bajerlein
Keyword(s):  
Energy Consumption ◽  
Operating Conditions ◽  
Vehicle Speed ◽  
Suspension Systems ◽  
Actual Operating ◽  
Vehicle Operation ◽  
Total Energy Balance ◽  
The Impact ◽  
Road Emission ◽  
Speed Engine

This paper presents the investigations, whose aim was to determine the influence of the operation of electric and mechanical compressors on the energy consumption of city buses in public transport. The tests were performed on pneumatic systems used in city transit vehicles whose underlying component is a compressor generating pressure for the brake and suspension systems. Owing to the application of a portable analyzer - SEMTECH DS the emissions (with a secondly resolution) of CO, HC, NOx, CO2 in the exhaust gases were measured. The on-road emission tests were performed in the actual operating conditions in SORT driving tests. These tests reflect the actual vehicle operation in a real task through preset procedures of their realization and measurements determining the energy consumption and exhaust emissions or the influence of the vehicle accessories and all variables (vehicle speed, engine load, acceleration or distance covered) on the total energy balance. The on-road tests were performed on a runway of the Bednary airstrip in Poland.

Simulation of Residential Energy Consumption Based on Software of DeST

2013 ◽  
Vol 448-453 ◽  
pp. 1269-1272
Author(s):  
Zhao Chen ◽  
Li Bai ◽  
Feng Li
Keyword(s):  
Energy Consumption ◽  
System Design ◽  
Energy Saving ◽  
Residential Building ◽  
Heating System ◽  
Residential Energy ◽  
Residential Energy Consumption ◽  
Heating Energy Consumption ◽  
Uneven Heating ◽  
The City

In this paper, the software of DeST was used to simulate the heating energy consumption by the year of a typical energy-saving residential building in the city of Changchun. Comparing the energy consumption of the top and bottom,the middle room and the edges rooms ,we get the reasons for the uneven heating and put forward the corresponding solutions, which provide the reference for heating system design.

Energy Consumption Discussions of Porcelain Produce with Operating Conditions in a Simplified Model

2014 ◽  
Vol 936 ◽  
pp. 1775-1779
Author(s):  
Jun Liang Yu
Keyword(s):  
Energy Consumption ◽  
High Energy ◽  
Operating Conditions ◽  
Simplified Model ◽  
Net Energy ◽  
Mass Ratio ◽  
Solid Mass ◽  
Fuel Distribution ◽  
Total Energy Balance ◽  
Excess Number

Porcelain produce is a very high energy consumption process. According to total energy balance analysis, a variety of operating conditions are analyzed for effect of net energy consumption. One real porcelain plate produce process is introduced as the reference case. Operating conditions are defined in three parameters, which are air excess number, fuel distribution and solid mass ratio. A simplified model based on finite difference method (FDM) is solved to calculate axial gas and solid temperature profiles and net energy consumption. The net energy consumption in porcelain produce is calculated and discussed in quantity with three operating conditions above separately. Finally, it is concluded that net energy consumption is higher with bigger air excess number and solid mass ratio, while fuel distribution will have no influence on net energy consumption.

scholarly journals APLICATION OF REGRESSION ANALYSIS IN FEASIBILITY STUDIES OF CONSUMER CONNECTION TO DISTRICT HEATING SYSTEMS

2021 ◽  
Vol XXVIII (4) ◽  
pp. 121-132
Author(s):  
Corina Chelmenciuc ◽  
◽  
Constantin Borosan ◽  
Vadim Lisnic ◽  
◽  
...  
Keyword(s):  
Regression Analysis ◽  
Urban Areas ◽  
District Heating ◽  
Feasibility Studies ◽  
Heating System ◽  
Primary Energy ◽  
Energy Resources ◽  
District Heating System ◽  
Heating Systems ◽  
District Heating Systems

Nowadays, both globally and in Europe, and nationally, there is a tendency to promote district heating systems to the detriment of individual ones to heat dwellings in urban areas. The need to develop the DHSs is indisputable considering the topicality of global warming, the depletion of the primary energy resources and the energy efficiency trend. This article presents the method of applying regression analysis in feasibility studies for the projects of new heat consumers connection to the district heating system (hereinafter – DHS) or previously disconnected consumers reconnection via individual heating points (hereinafter – IHP) when the necessary investments are to be borne by the DHS operator, and the thermal energy is produced in cogeneration. At the same time, it is demonstrated that there is a direct and linear correlation between fuel consumption and electricity and heat produced in cogeneration at CHP plant.

scholarly journals ЕНЕРГОСПОЖИВАННЯ НАВЧАЛЬНИХ КОРПУСІВ УНІВЕРСИТЕТУ В УМОВАХ КАРАНТИННИХ ОБМЕЖЕНЬ УКРАЇНИ

2021 ◽  
pp. 9-19
Author(s):  
VALERII DESHKO ◽  
INNA BILOUS ◽  
IRYNA SUKHODUB ◽  
TETYANA BOIKO
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Integrated Approach ◽  
Climatic Conditions ◽  
Operating Conditions ◽  
Normal Operation ◽  
Software Environment ◽  
Depth Analysis ◽  
Educational Buildings ◽  
Academic Building

Target. To analyze the features of energy consumption of the building of the educational building No. 17 of the National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute" in the conditions of quarantine restrictions in the implementation of energy-saving heating schemes.Methodology. Dynamic energetic modeling of a university academic building created in the DesignBuilder software environment under normal and quarantine modes.Results. Recommendations for the implementation of energy-saving modes of heating the building of the academic building of the university during the period of distance learning when introducing quarantine restrictions in Ukraine.Scientific novelty. An integrated approach has been developed to an in-depth analysis of energy consumption under conditions of partial use of the premises of educational buildings during the quarantine period. It is substantiated that the use of premises with partial operation of the building requires additional unit costs for heating needs.Practical significance. Simulation dynamic modeling of the building's energy consumption for heating for various modes of operation and employment / use of premises of educational buildings during the quarantine period in Ukraine, the results of the study will allow to obtain a set of energy characteristics of the building as a whole and its individual rooms / zones for hourly changes in internal operating conditions and external climatic conditions. The use of the proposed scheme of operation of the heating system of the building of the educational building allows to reduce energy consumption during the heating period by 8,5% compared to energy consumption during normal operation, which is economically feasible in conditions of partial occupancy of the building during quarantine restrictions (during lockdown) and an unpredictable macroeconomic situation on the energy market, causing a trend towards an increase in prices for basic energy resources.

Uses of Glass in Architecture: Heat Losses of Buildings Based on Translucent Structures

2014 ◽  
Vol 680 ◽  
pp. 481-485 ◽  
Author(s):  
Yury Nikitin ◽  
Vera Murgul ◽  
Nikolay Vatin ◽  
Viktor Pukhkal
Keyword(s):  
Thermal Properties ◽  
Energy Consumption ◽  
High Heat ◽  
Heat Losses ◽  
Building Envelopes ◽  
Heating Systems ◽  
Saint Petersburg ◽  
The City

At present time translucent structures have appeared to be the most crucial issues regarding building envelopes in relation to high heat losses in the cold periods of the year. Development of the methods to improve thermal properties of translucent structures is considered to be an up-to-date issue. Heat losses of exhibition halls with varied dimensions ratio and energy consumption of heating systems have been determined for the case of the city of Saint-Petersburg (Russia)

Heating Systems

2019 ◽  
pp. 283-307
Author(s):  
Teodora Melania Şoimoşan ◽  
Raluca Andreea Felseghi ◽  
Maria Simona Răboacă ◽  
Constantin Filote
Keyword(s):  
Fossil Fuels ◽  
Energy Use ◽  
Renewable Energy Sources ◽  
Heating System ◽  
Operating Conditions ◽  
Optimum Operating ◽  
Energy Sources ◽  
Total Energy Consumption ◽  
Heating Systems ◽  
Heating And Cooling

Within the current context of energy, there are several ways to meet the challenges of durable development. Efficiency in energy use, considered to be the fifth energy source, as well as the use of sustainable energy sources represent critical objectives. Nowadays, almost 50% of the total energy consumption in Europe is consumed by building heating and cooling. The current heat demand is mainly covered by conventional energy—fossil fuels. Consequently, there is a significant growth potential for the use of renewable energy sources (RES) in order to produce heat. One can expect in the near future that the energy systems would include a larger percentage of renewable sources, so the increase of the RES share is one of the main objectives of the thermoenergetic field. This chapter approaches heating system typology, the performance indicators used to asses the hybrid heating systems, and at the same time synthetising the assumptions of ensuring the optimum operating conditions.

scholarly journals Proposal of a PCM Underfloor Heating System Using a Web Construction Method

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Sanghoon Baek ◽  
Jin Chul Park
Keyword(s):  
Energy Consumption ◽  
Thermal Storage ◽  
Heating System ◽  
Hot Water ◽  
Wire Mesh ◽  
Heating Systems ◽  
Temperature Range ◽  
Apartment Buildings ◽  
Storage Performance ◽  
Web Construction

Apartment buildings in Korea have adopted underfloor heating systems using web construction methods based on concrete and hot water systems. However, since such systems consume significant amounts of energy for heating owing to their low thermal storage performance, it is necessary to develop a new system that can minimize energy consumption by improving concrete thermal storage performance. This study proposes a phase-change material (PCM) underfloor heating system to reduce energy consumption in apartment buildings. An optimal design for a PCM underfloor heating system is proposed, and thermal storage performance of the proposed system is evaluated experimentally. The temperature range of the PCM for underfloor heating is also calculated considering the proposed design and comfortable heating conditions for domestic apartment buildings. Results indicate that a PCM underfloor heating system can be constructed in the following order: (1) a 210 mm concrete slab, (2) a 20 mm cushioning material, (3) 40 mm of mortar including a 10 mm PCM thermal storage container, and (4) 40 mm of finishing mortar including wire mesh and hot water pipes. The temperature range of the PCM used for underfloor heating in domestic apartment buildings is 32–45°C. Experimental tests reveal that thermal storage performance of underfloor heating systems that apply 35, 37, 41, and 44°C as representative PCM temperatures is superior to existing systems.

scholarly journals Mathematical Analysis of Optimal Operating Conditions in Heating Systems

2019 ◽  
Vol 2019 ◽  
pp. 1-16
Author(s):  
Chan Kong ◽  
Yong Sun ◽  
Hongxi Zhang ◽  
Yongjiang Shi
Keyword(s):  
Water Temperature ◽  
Flow Rate ◽  
Heating System ◽  
Optimal Operation ◽  
Operating Conditions ◽  
Experimental Results ◽  
Optimal Operating ◽  
Heating Systems ◽  
Operation Conditions ◽  
Supply Water

With changes in the outdoor air temperature, the heat consumption of buildings also changes. Timely adjustment of the heating systems to ensure optimal operating conditions is extremely significant to save energy. In this study, the operation conditions of a heating system were analyzed numerically, and the existence, uniqueness, and stability of the optimal operation conditions of the heating system were proved. An operation optimization model that could obtain the optimal operation conditions was also established, and the correctness of the model was verified experimentally. Experimental results showed that when the flow rate was 0.606 m3/h, the supply water temperature was 67.13°C, water return temperature was 65.90°C, and the pump consumed the least amount of electricity. The experimental results and model calculation results showed that the operating cost is lower when the system flow rate is low and the supply water temperature is high under the same heat dissipation and indoor temperature.

scholarly journals Energy Analyses of Serbian Buildings with Horizontal Overhangs: A Case Study

Energies ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 4577 ◽  
Author(s):  
Danijela Nikolic ◽  
Slobodan Djordjevic ◽  
Jasmina Skerlic ◽  
Jasna Radulovic
Keyword(s):  
Energy Consumption ◽  
Residential Building ◽  
Primary Energy ◽  
Embodied Energy ◽  
Building Energy Efficiency ◽  
Total Energy Consumption ◽  
Software Environment ◽  
Annual Consumption ◽  
The City

It is well known that nowadays a significant part of the total energy consumption is related to buildings, so research for improving building energy efficiency is very important. This paper presents our investigations about the dimensioning of horizontal overhangs in order to determine the minimum annual consumption of building primary energy for heating, cooling and lighting. In this investigation, embodied energy for horizontal roof overhangs was taken into account. The annual simulation was carried out for a residential building located in the city of Belgrade (Serbia). Horizontal overhangs (roof and balcony) are positioned to provide shading of all exterior of the building. The building is simulated in the EnergyPlus software environment. The optimization of the overhang size was performed by using the Hooke Jeeves algorithm and plug-in GenOpt program. The objective function minimizes the annual consumption of primary energy for heating, cooling and lighting of the building and energy spent to build overhangs. The simulation results show that the building with optimally sized roof and balcony overhangs consumed 7.12% lessprimary energy for heating, cooling and lighting, compared to the house without overhangs. A 44.15% reduction in cooling energy consumption is also achieved.

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