scholarly journals ENERGY AND EMISSION ANALYSES OF A SOLAR ENERGY BASED DISTRICT HEATING SYSTEM

2020 ◽  
Vol 10 (1) ◽  
pp. 18-22
Author(s):  
Cristina CALIN ◽  
Eugen Victor RUSU ◽  
Ion ION ◽  
Gabriel MOCANU
Keyword(s):  
System Integration ◽  
Heat Storage ◽  
District Heating ◽  
Heating System ◽  
Solar Heating ◽  
Total System ◽  
District Heating System ◽  
Heat Demand ◽  
Seasonal Heat ◽  
Multifamily Buildings

The energy, economic and environmental analysis of a solar heating system with seasonal heat storage integrated into a district heating system based on natural gas boiler was performed. The solar collector field has a surface area of 8720 m2 and the pit seasonal heat storage has a volume of 10000 m3. This system covers 79% of the total yearly heat demand of the 15 multifamily buildings with 1500 inhabitants. The total system investment cost (2974100 €) may be recovered in about 17 years. The environmental impact of solar heating system integration is the decrease of CO2 emission by 79%.

scholarly journals MODELLING THE SIZE OF SEASONAL THERMAL STORAGE IN THE SOLAR DISTRICT HEATING SYSTEM / SEZONINĖS ŠILUMOS AKUMULIACINĖS TALPYKLOS TŪRIO MODELIAVIMAS CENTRALIZUOTOJE SAULĖS ŠILDYMO SISTEMOJE

2012 ◽  
Vol 5 (4) ◽  
pp. 499-506
Author(s):  
Giedrė Streckienė ◽  
Salomėja Bagdonaitė
Keyword(s):  
Storage System ◽  
Boiler House ◽  
Thermal Storage ◽  
Heating System ◽  
Solar Heating ◽  
System Modelling ◽  
Solar Thermal Energy ◽  
District Heating System ◽  
Climate Conditions ◽  
Heat Demand

The integration of a thermal storage system into the solar heating system enables to increase the use of solar thermal energy in buildings and allows avoiding the mismatch between consumers’ demand and heat production in time. The paper presents modelling a seasonal thermal storage tank various sizes of which have been analyzed in the district solar heating system that could cover a part of heat demand for the district of individual houses in Vilnius. A biomass boiler house, as an additional heat source, should allow covering the remaining heat demand. energyPRO software is used for system modelling. The paper evaluates heat demand, climate conditions and technical characteristics. Santrauka Šilumos akumuliavimo sistemos integracija į saulės šildymo sistemą suteikia galimybę padidinti Saulės šiluminės energijos panaudojimą pastatuose, nes tai leidžia išvengti vartotojų poreikio ir šilumos gamybos nesutapimo laike. Šiame darbe modeliuojama sezoninė šilumos akumuliacinė talpykla, analizuojami įvairūs jos dydžiai centralizuotoje saulės šildymo sistemoje. Nagrinėjama sistema galėtų užtikrinti dalį individualių namų mikrorajono, esančio Vilniuje, šilumos poreikių. Kaip papildomas šilumos šaltinis modeliuojama biokuro katilinė, kuri leistų užtikrinti likusią šilumos poreikių dalį. Modeliavimas atliekamas energyPRO programa įvertinant pastatų poreikius, klimatines sąlygas ir technologines įrenginių charakteristikas.

scholarly journals Excess heat utilization combined with thermal storage integration in district heating systems using renewables

2020 ◽  
Vol 24 (6 Part A) ◽  
pp. 3673-3684
Author(s):  
Borna Doracic ◽  
Marino Grozdek ◽  
Tomislav Puksec ◽  
Neven Duic
Keyword(s):  
Service Sector ◽  
Peak Load ◽  
District Heating ◽  
Thermal Storage ◽  
Heating System ◽  
District Heating System ◽  
Heating Systems ◽  
Excess Heat ◽  
Heat Demand ◽  
District Heating Systems

District heating systems already play an important role in increasing the sustainability of the heating sector and decreasing its environmental impact. However, a high share of these systems is old and inefficient and therefore needs to change towards the 4th generation district heating, which will incorporate various energy sources, including renewables and excess heat of different origins. Especially excess heat from industrial and service sector facilities is an interesting source since its potential has already been proven to be highly significant, with some researches showing that it could cover the heat demand of the entire residential and service sector in Europe. However, most analyses of its utilisation in district heating are not done on the hourly level, therefore not taking into account the variability of its availability. For that reason, the main goal of this work was to analyse the integration of industrial excess heat into the district heating system consisting of different configurations, including the zero fuel cost technologies like solar thermal. Furthermore, cogeneration units were a part of every simulated configuration, providing the link to the power sector. Excess heat was shown to decrease the operation of peak load boiler and cogeneration, that way decreasing the costs and environmental effect of the system. However, since its hourly availability differs from the heat demand, thermal storage needs to be implemented in order to increase the utilisation of this source. The analysis was performed on the hourly level in the energyPRO software

scholarly journals Techno-economic analysis of implementing thermal storage for peak load shaving in a campus district heating system with waste heat from the data centre

2021 ◽  
Vol 246 ◽  
pp. 09003
Author(s):  
Haoran Li ◽  
Juan Hou ◽  
Yuemin Ding ◽  
Natasa Nord
Keyword(s):  
Waste Heat ◽  
Peak Load ◽  
District Heating ◽  
Thermal Storage ◽  
Heating System ◽  
Water Tank ◽  
District Heating System ◽  
Heating Systems ◽  
Heat Demand ◽  
District Heating Systems

Peak load has significant impacts on the economic and environmental performance of district heating systems. Future sustainable district heating systems will integrate thermal storages and renewables to shave their peak heat demand from traditional heat sources. This article analysed the techno-economic potential of implementing thermal storage for peak load shaving, especially for the district heating systems with waste heat recovery. A campus district heating system in Norway was chosen as the case study. The system takes advantage of the waste heat from the campus data centre. Currently, about 20% of the heating bill is paid for the peak load, and a mismatch between the available waste heat and heat demand was detected. The results showed that introducing water tank thermal storage brought significant effects on peak load shaving and waste heat recovery. Those effects saved up to 112 000 EUR heating bills annually, and the heating bill paid for the peak load could be reduced by 15%. Meanwhile, with the optimal sizing and operation, the payback period of the water tank could be decreased to 13 years. Findings from this study might help the heat users to evaluate the economic feasibility of introducing thermal storage.

Hydraulic Analysis of a District Heating Network

2008 ◽  
Author(s):  
Daniela Popescu ◽  
Elena Serban ◽  
Carmen-Ema Panaite ◽  
Abel Herna´ndez-Guerrero
Keyword(s):  
Fluid Flow ◽  
Pressure Loss ◽  
District Heating ◽  
Stationary Flow ◽  
Heating System ◽  
District Heating System ◽  
Flow Rates ◽  
Flow Balance ◽  
Heat Demand ◽  
Non Linear System

The aim of this work is to study the influence of pressure loss parameters from a district heating system on the distribution of fluid flow rates. The research was finalized by improving the mathematical model of a district heating network, which comprises an algebraic non-linear system that synthesizes flow balance equations of a stationary flow. This enhanced model indicates the influence of every consumer’s heat demand supplied from a district heating network on the fluid flow rates distribution based on the means of the implicit function theorem. The originality of the method consists of considering the network a sensitive system that responds to the variations of input parameters (pressure loss parameters) by variations of output parameter (fluid flow rates). The main advantage is that the engineer in charge with exploitation of the heating system may understand what happens with the flow allocations when pressure loss parameters of the network are different from the nominal ones, without making any measurements on the field or computations using new scenarios. The method presented in this paper facilitates the choice of the best decision concerning balancing and practical management of radial heating networks.

scholarly journals Evaluation of integration of solar energy into the district heating system of the city of Velika Gorica

2016 ◽  
Vol 20 (4) ◽  
pp. 1049-1060 ◽  
Author(s):  
Andreu Felipe ◽  
Daniel Schneider ◽  
Goran Krajacic
Keyword(s):  
Low Temperature ◽  
District Heating ◽  
Economic Assessment ◽  
Heating System ◽  
Solar Heating ◽  
District Heating System ◽  
High Penetration ◽  
The City ◽  
Heating Plant ◽  
Reduction Of Costs

In the current situation the district heating system supplies the 32% of the total thermal consumption in the City of Velika Gorica. The main issue in the district heating system is the utilization of 14 small and distributed heat plants, each providing heat to a separate and individually disconnected heating grid. Reduction of costs and CO2 emissions can be reached with a high penetration of renewable sources. The aim of this paper is to evaluate and design the integration of a Central Solar Heating Plant with Seasonal Storage into the district heating system of the City. An economic assessment was made with a pessimistic and an optimistic prediction of the solar heat cost for ground mounted collectors and roof mounted collectors. The seasonal storage was chosen to be pit thermal energy storage; the system was modeled as a low-temperature district heating system with the real thermal demands of a district heating plant.

Sign in / Sign up

Export Citation Format

Share Document