On the influence of decommissioning an area thermal substation in a district heating system on heat consumption and costs in buildings – Long term field research

2022 ◽  
Vol 50 ◽  
pp. 101870
Author(s):  
Alicja Siuta-Olcha ◽  
Tomasz Cholewa ◽  
Mirosław Gomółka ◽  
Piotr Kołodziej ◽  
Dorte Skaarup Østergaard ◽  
...  
Keyword(s):  
District Heating ◽  
Field Research ◽  
Heating System ◽  
Heat Consumption ◽  
District Heating System ◽  
Term Field

scholarly journals Long-term Green Innovation Opportunities Within the Hungarian District Heating Sector Towards 2030

2016 ◽  
Vol 4 (1) ◽  
pp. 12-24
Author(s):  
Balint Horvath ◽  
Maria Borocz ◽  
Sandor Zsarnoczai ◽  
Csaba Fogarassy
Keyword(s):  
Natural Gas ◽  
District Heating ◽  
Heating System ◽  
Simple Fact ◽  
District Heating System ◽  
Primary Input ◽  
Cooling Systems ◽  
The Public ◽  
Heating And Cooling

Abstract Natural gas is still the primary input of the Hungarian heating and cooling systems, therefore it still makes most of the overheads. One of the main obstacles of a competitive district heating system is the public opinion which still considers this service more expensive than the traditional heating forms. According to the absolute numbers this assumption might be valid but from a more accurate economic perspective, heat production has more aspects to stress. Most people forget about the simple fact that the maintenance costs of natural gas based systems are rather outsourced to the consumer than in the case of district heating. Furthermore, the uneven rate of the fixed and variable costs of this technology does not prove to be optimal for service developments. Investigating the future tendencies highlight that encouraging the efficiency improvement of district heating and the spread of technological innovation in the sector does not belong to the top priorities. Still, avoiding this problem it could lead serious deadweight losses in the case of the heating sector.

scholarly journals Some Problems of the Integration of Heat Pump Technology into a System of Combined Heat and Electricity Production

10.14311/212 ◽  
2001 ◽  
Vol 41 (2) ◽  
Author(s):  
G. Böszörményi ◽  
L. Böszörményi
Keyword(s):  
Heat Pump ◽  
District Heating ◽  
Heating System ◽  
Energy Utilization ◽  
Electricity Production ◽  
Geothermal Heat ◽  
District Heating System ◽  
Thermal Output ◽  
Short Period

The closure of a part of the municipal combined heat and power (CHP) plant of Košice city would result in the loss of 200 MW thermal output within a realtively short period of time. The long term development plan for the Košice district heating system concentrates on solving this problem. Taking into account the extremely high (90 %) dependence of Slovakia on imported energy sources and the desirability of reducing the emission of pollutantst the alternative of supplying of 100 MW thermal output from geothermal sources is attractive. However the indices of economic efficiency for this alternative are unsatisfactory. Cogeneration of electricity and heat in a CHP plant, the most efficient way of supplying heat to Košice at the present time. If as planned, geothermal heat is fed directly into the district heating network the efficiency would be greatly reduced. An excellent solution of this problem would be a new conception, preferring the utilization of geothermal heat in support of a combined electricity and heat production process. The efficiency of geothermal energy utilization could be increased through a special heat pump. This paper deals with several aspects of the design of a heat pump to be integrated into the system of the CHP plant.

The Bio-Fuel Boiler House Concept in the District Heating Applications

2001 ◽  
Author(s):  
Mieczysław Dzierzgowski ◽  
Ryszard Zwierzchowski
Keyword(s):  
Supply And Demand ◽  
Boiler House ◽  
District Heating ◽  
Heating System ◽  
Summer Season ◽  
Heat Consumption ◽  
Heat Accumulation ◽  
District Heating System ◽  
Efficient Operation ◽  
Operational Analysis

Abstract The biomass boiler house concept in the district heating applications, both from technical and economical point of view is detailed analyzed to assure the most effective investment and future operation. This paper is concerned with the application of the Bio-fuel Boilers (BfB) as a one of perspective way of the District Heating System (DHS) modernization programs in Poland. Considering use of bio-fuels, Poland has relatively big potential particularly in bio-mass. Appropriate bio-mass technology is mainly related to the potential and supply of the bio-mass in cosidered region of the country. Usually, due to supply of bio-fuel, bio-mass fired boiler house not exceeds 30–40 MW. For the purpose of selection of appropriate type and capacity of the BfB for installation in the District Heating Plant (DHP), operational analysis of the DHS and investigation of possible implementation of the Thermal Energy Storage (TES) systems were performed. Also, investment costs for the BfB and the TES system application in the DHS were assessed. Operational analysis of the DHS covered supply and demand side i.e., heat generation by the DHP and heat consumption by the consumers. Heat consumption analysis during summer season was carried out in order to increase operational efficiency of the BfB installations and for investigation of the TES systems application in the DHS. Heat storage in the DHS and its influence on capacity and operation of the BfB was also investigated. Both, heat accumulation by the District Heating Network (DHN) and by the non-pressure TES system were analyzed. Finally, results of calculation of the required capacity of the TES systems assuring continuous and efficient operation of the BfB installation in the DHS, especially during summer season were shown. Some advantages of the TES system implementation in the DHS in case where the BfB are applied in the DHP were presented as well.

scholarly journals HEAT DEMAND FOR HEATING APARTMENT BUILDINGS/GYVENAMŲJŲ NAMŲ FAKTINIO ŠILUMINĖS ENERGIJOS POREIKIO SULYGINIMAS SU PROJEKTINE ŠILDYMO SISTEMŲ GALIA

2000 ◽  
Vol 6 (5) ◽  
pp. 366-370
Author(s):  
Jūratė Karbauskaitė ◽  
Vytautas Stankevičius
Keyword(s):  
Energy Consumption ◽  
District Heating ◽  
Heating System ◽  
Heat Consumption ◽  
District Heating System ◽  
Apartment Buildings ◽  
Heat Demand ◽  
Heated Area ◽  
Design Values ◽  
Design Value

In this paper the results of statistic analysis of heat consumption in apartment heating systems for Lithuania are discussed. Kaunas district heating system data are used for the analysis. Total sum of buildings involved is about 1900, including 1550 with the average heated area of 4000 m2. It has been established that real heat consumption in apartment buildings is less than the design heat demand (Fig 1), especially in small buildings (Fig 2). The distribution of monthly differences is presented in Fig 3. The difference during months does not depend on average outdoor temperature, but it could be caused by temperature fluctuations and solar radiation. It is quite important to determine the reasons of different heat consumption in buildings. For this purpose 20 dwelling houses of various design and building period, with various energy consumption problems have been selected for more detailed energy audit. Volumes of external building elements, changes in destination of premises, heated area have been estimated as well as the state of heat supply sub-station equipment. According to the data obtained, the energy consumption was determined for standard month at mean indoor and outdoor climate values. The results are compared with real energy consumption in the selected buildings and design values. It has been established that the inadequacies in exceeded energy consumption over design values are mostly caused by incorrect heated area registration and premises destination change, in a less range by absence of maintenance, eg broken outside doors, damaged roofs etc. Energy consumption in dwelling houses with design indoor temperature and normal maintenance level usually is near to the design value or less up to 10%. In dwelling houses, in which energy consumption is defined as being of less design value, some energy saving measures are applied, eg temperature in spaces is lowered up to 16°C, about half of balconies are glassed, electric stoves for cooking are installed as additional heat source. Such apartment buildings, as a rule, do not have premises of other destination. By such means near 40% of heat is saved.

scholarly journals Consumption of wood fuels in households in Serbia: Present state and possible contribution to the climate change mitigation

2011 ◽  
Vol 15 (3) ◽  
pp. 571-585 ◽  
Author(s):  
Branko Glavonjic
Keyword(s):  
Climate Change Mitigation ◽  
Fossil Fuels ◽  
District Heating ◽  
Field Research ◽  
Heating System ◽  
District Heating System ◽  
Software Packages ◽  
Wood Fuels ◽  
Gis Software ◽  
Change Mitigation

The paper presents results of the research in wood fuels consumption for house-hold needs in Serbia. Research was performed during the period from October 2010 until April 2011, i. e. in the period of heating season in order to get the actual situation regarding the presence of certain fuel types in the consumption of households with special highlight on types and amounts of wood fuels. For this purpose, an adequate methodological concept was defined with the aim to primarily get relevant and reliable data on wood fuels consumption and afterwards, by using FAO WISDOM methodology and adequate GIS software packages to perform their analysis, mapping, and graphic representation. One of the most significant elements of the adopted methodological concept was field research-questionnaire of households which was conducted on the sample of 36.946 households out of which 20.725 urban and 16.221 rural in 22 municipalities in Serbia, which was 1.46% of the total number of households in Serbia. Results of the survey showed that 23.2% of the total number of households in Serbia used district heating system (based on conventional fossil fuels as dominant), 25.3% used electricity, and 10.6% used gas for heating purposes. Most households (40.9%) used solid fuels such as fuelwood, coal, briquettes, pellets, agricultural residues and combinations of solid and other fuels.

scholarly journals Technology Pathways and Economic Analysis for Transforming High Temperature to Low Temperature District Heating Systems

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3218
Author(s):  
Pedro Durán ◽  
Herena Torio ◽  
Patrik Schönfeldt ◽  
Peter Klement ◽  
Benedikt Hanke ◽  
...  
Keyword(s):  
Sensitivity Analysis ◽  
Renewable Energy ◽  
High Temperature ◽  
Low Temperature ◽  
Economic Analysis ◽  
District Heating ◽  
Heating System ◽  
District Heating System ◽  
Heating Systems ◽  
District Heating Systems

There are 1454 district heating systems in Germany. Most of them are fossil based and with high temperature levels, which is neither efficient nor sustainable and needs to be changed for reaching the 2050 climate goals. In this paper, we present a case study for transforming a high to low temperature district heating system which is more suitable for renewable energy supply. With the Carnot Toolbox, a dynamic model of a potential district heating system is simulated and then transformed to a low temperature supply. A sensitivity analysis is carried out to see the system performance in case space constrains restrict the transformation. Finally, an economic comparison is performed. Results show that it is technically possible to perform the transformation until a very low temperature system. The use of decentralized renewable sources, decentralized heat storage tanks and the placement of a heat pump on each building are the key points to achieve the transformation. Regarding the sensitivity analysis, the transformation is worth doing until the seasonal storage and solar collector field sizes are reduced to 60% and 80% of their values in the reference case, respectively. The economic analysis shows, however, that it is hard for highly efficient low temperature renewable based heat networks to compete with district heating systems based on a centralized fossile CHP solution. Thus, though the presented transformation is technically possible, there is a strong need to change existing economic schemes and policies for fostering a stronger promotion of renewable energy policies in the heat sector.

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