DISTRICT HEATING SYSTEM DESIGN FOR RURAL NOVA SCOTIAN COMMUNITIES USING BUILDING SIMULATION AND ENERGY USAGE DATABASES

2009 ◽  
Vol 33 (1) ◽  
pp. 51-64 ◽  
Author(s):  
Jaspreet S. Nijjar ◽  
Alan S. Fung ◽  
Larry Hughes ◽  
Hessam Taherian
Keyword(s):  
System Design ◽  
Energy Demand ◽  
District Heating ◽  
Heating System ◽  
Energy System ◽  
Building Simulation ◽  
Energy Usage ◽  
District Heating System ◽  
District Energy ◽  
Heating Profiles

There are several benefits to district heating systems. The system design requires knowledge of community peak heating load and annual heating energy requirements. For this purpose, a residential energy model was developed using several energy usage databases. Hourly, peak, and annual heating demands were estimated by simulating 15 archetype houses using an hour-by-hour building simulation program, ENERPASS. Estimated heating profiles from model houses were used to design a district heating system for a hypothetical rural community in Nova Scotia. The findings show that building simulation is a very flexible and valuable tool in identifying the required peak and hourly energy demand of a community for the design of district energy system, and biomass district heating system can reduce community greenhouse gas emissions.

scholarly journals Advanced Control of a District Heating System with High Residential Domestic Hot Water Demand

2020 ◽  
Vol 160 ◽  
pp. 01004 ◽  
Author(s):  
Stanislav Chicherin ◽  
Lyazzat Junussova ◽  
Timur Junussov
Keyword(s):  
Energy Demand ◽  
Energy Use ◽  
District Heating ◽  
Heating System ◽  
Primary Energy ◽  
Hot Water ◽  
District Heating System ◽  
Domestic Hot Water ◽  
Extreme Load ◽  
Flow Controller

Proper adjustment of domestic hot water (DHW) load structure can balance energy demand with the supply. Inefficiency in primary energy use prompted Omsk DH company to be a strong proponent of a flow controller at each substation. Here the return temperature is fixed to the lowest possible value and the supply temperature is solved. Thirty-five design scenarios are defined for each load deviation index with equally distributed outdoor temperature ranging from +8 for the start of a heating season towards extreme load at temperature of -26°C. All the calculation results are listed. If a flow controller is installed, the customers might find it suitable to switch to this type of DHW supply. Considering an option with direct hot water extraction as usual and a flow controller installed, the result indicates that the annual heat consumption will be lower once network temperatures during the fall or spring months are higher. The heat load profiles obtained here may be used as input for a simulation of a DH substation, including a heat pump and a tank for thermal energy storage. This design approach offers a quantitative way of sizing temperature levels in each DH system according to the listed methodology and the designer's preference.

scholarly journals District heating system design for a university campus

2006 ◽  
Vol 38 (9) ◽  
pp. 1111-1119 ◽  
Author(s):  
Nurdan Yıldırım ◽  
Macit Toksoy ◽  
Gülden Gökçen
Keyword(s):  
System Design ◽  
District Heating ◽  
Heating System ◽  
University Campus ◽  
District Heating System

scholarly journals Comparison of 4th and 5th generation district heating systems

2021 ◽  
Vol 246 ◽  
pp. 09004
Author(s):  
Oddgeir Gudmundsson ◽  
Anders Dyrelund ◽  
Jan Eric Thorsen
Keyword(s):  
District Heating ◽  
Heating System ◽  
Heat Pumps ◽  
District Heating System ◽  
Heating Systems ◽  
District Energy ◽  
District Heating Systems ◽  
Operating Temperatures ◽  
New Research ◽  
Levelized Cost Of Heat

In a pursuit to increase the efficiency of district heating system there has been a continuous focus to reduce the system operating temperatures. This has led to the current state of the art district heating systems, commonly referred to as the 4th generation district heating, also known as low temperature district heating (LTDH). The success of the LTDH has fuelled a lot of research interest in district energy systems, one of the new research topics has been focusing on reducing the operating temperatures down to the ambient temperature (ATDH), commonly referred as 5th generation district heating. In these systems the supply temperature is insufficient for fulfilling the heating demands of the connected buildings, which then requires end-user located heat pumps to raise the supply temperature to the level required by the buildings. As of today, number of ATDH systems have been realized as part of various research projects. The question however remains if ATDH brings additional benefits compared to LTDH. This paper compares the levelized cost of heat from these two systems types for two countries with different climate zones. The results of the analysis indicate that LTDH is the favourable solution in both countries.

scholarly journals Analysis and comparison of methods for the preparation of domestic hot water from district heating system, selected renewable and non-renewable sources in low-energy buildings

2018 ◽  
Vol 30 ◽  
pp. 03001
Author(s):  
Maciej Knapik
Keyword(s):  
Renewable Energy ◽  
Energy Demand ◽  
Renewable Energy Sources ◽  
District Heating ◽  
Heating System ◽  
Hot Water ◽  
Low Energy ◽  
Energy Sources ◽  
District Heating System ◽  
Domestic Hot Water

The article presents an economic analysis and comparison of selected (district heating, natural gas, heat pump with renewable energy sources) methods for the preparation of domestic hot water in a building with low energy demand. In buildings of this type increased demand of energy for domestic hot water preparation in relation to the total energy demand can be observed. As a result, the proposed solutions allow to further lower energy demand by using the renewable energy sources. This article presents the results of numerical analysis and calculations performed mainly in MATLAB software, based on typical meteorological years. The results showed that system with heat pump and renewable energy sources Is comparable with district heating system.

scholarly journals Evaluation of design objectives in district heating system design

Energy ◽  
2019 ◽  
Vol 167 ◽  
pp. 369-378 ◽  
Author(s):  
Mikko Kouhia ◽  
Timo Laukkanen ◽  
Henrik Holmberg ◽  
Pekka Ahtila
Keyword(s):  
System Design ◽  
District Heating ◽  
Heating System ◽  
District Heating System

Optimization of a Local District Heating Plant Under Fuel Flexibility and Performance

2011 ◽  
Author(s):  
Souman Rudra ◽  
Lasse Rossendahl ◽  
Niels From
Keyword(s):  
Natural Gas ◽  
Fossil Fuels ◽  
System Analysis ◽  
Reference Model ◽  
District Heating ◽  
Heating System ◽  
Energy System ◽  
District Heating System ◽  
And Performance ◽  
Heating Plant

Brovst is a small district in Denmark. Based on the case of Brovst, this paper analyses the role of district heating in future Renewable Energy Systems. The present use of fossil fuels in the Brovst DHP (district heating plant) represents an increasing environmental and climate-related load. So, an investigation has been made to reduce the use of fossil fuels for district heating system and make use of the local renewable resources (Biogas, Solar and Geothermal) for district heating purpose. In this article, the techno-economic assessment is achieved through the development of a suite of models that are combined to give cost and performance data for this district heating system. Different local fuels have been analyzed for different perspectives to find the way to optimize the whole integrated system in accordance with fuel availability and cost. This paper represents the energy system analysis mode energyPRO which has been used to analyses the integration of large scale energy system into the domestic district heating system. A model of the current work on the basis of information from the plant (using fossil fuel) is established and named as a reference model. Then different solutions are calculated for various local fuels in energyPRO. A comparison has been made between the reference model and the basis for individual solutions. The greatest reduction in heat price is obtained by replacing one engine with a new biogas where heat production is divided by 66% of biogas, 13% natural gas engines and 21% natural gas boilers.

scholarly journals Life Cycle Cost of Building Energy Renovation Measures, Considering Future Energy Production Scenarios

Energies ◽  
2019 ◽  
Vol 12 (14) ◽  
pp. 2719 ◽  
Author(s):  
Moa Swing Gustafsson ◽  
Jonn Are Myhren ◽  
Erik Dotzauer ◽  
Marcus Gustafsson
Keyword(s):  
Life Cycle ◽  
Life Cycle Cost ◽  
Energy Production ◽  
District Heating ◽  
Heating System ◽  
Energy System ◽  
Reference Case ◽  
District Heating System ◽  
System Perspective ◽  
Future Production

A common way of calculating the life cycle cost (LCC) of building renovation measures is to approach it from the building side, where the energy system is considered by calculating the savings in the form of less bought energy. In this study a wider perspective is introduced. The LCC for three different energy renovation measures, mechanical ventilation with heat recovery and two different heat pump systems, are compared to a reference case, a building connected to the district heating system. The energy system supplying the building is assumed to be 100% renewable, where eight different future scenarios are considered. The LCC is calculated as the total cost for the renovation measures and the energy systems. All renovation measures result in a lower district heating demand, at the expense of an increased electricity demand. All renovation measures also result in an increased LCC, compared to the reference building. When aiming for a transformation towards a 100% renewable system in the future, this study shows the importance of having a system perspective, and also taking possible future production scenarios into consideration when evaluating building renovation measures that are carried out today, but will last for several years, in which the energy production system, hopefully, will change.

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