district heating energy Articles
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Rational use and management of geothermal energy resources
This article identifies and explains several attributes of geothermal energy. High exergetic efficiency due to a close temperature tie between geothermal energy and district heating and cooling was noted. Parameters governing the rational use and management of geothermal energy systems with special emphasis on integrated-cascaded district energy systems were formulated and explained with two case ...
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Investigation of some renewable energy and exergy parameters for two Geothermal District Heating Systems
In this study, three new exergy parameters, namely total exergy destruction ratio, component exergy destruction ratio and dimensionless exergy destruction are introduced in addition to energetic renewability ratio, exergetic renewability ratio, energetic reinjection ratio and exergetic reinjection ratio, and compared for Edremit and Bigadic Geothermal District Heating Systems (GDHSs) based on ...
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Thermodynamic analysis of a geothermal district heating system
Thermoeconomic analysis is considered a useful tool for investigators in engineering and other disciplines due to its methodology based on the quantities exergy, cost, energy and mass. This study deals with an investigation of capital costs and thermodynamic losses for devices in the Balcova Geothermal District Heating Systems (BGDHS). Thermodynamic loss rate-to-capital cost ratios are used for ...
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University Campus – Cafeteria, Heilbronn, Germany - Case study
A green hill lies between the central campus square and the tall lecture halls. It is divided diagonally and has a terrace for outdoor dining. A curved staircase leads down to the cafeteria, which is also connected to the assembly hall of the university via a tunnel. The actual common visitors' area is in the basement, but nevertheless receives so much daylight that artificial lighting is not ...
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How heat network providers can raise standards with the Heat Trust
Community and district heating specialist Switch2 Energy has published a free guide to help heat network providers to meet the best practice standards of the Heat Trust. The eGuide, titled 'A Heat Supply You Can Trust' is available free to download. It explains how heat suppliers can raise quality and customer service standards to gain membership of the Heat Trust and comply with its voluntary ...
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Thermodynamic assessment of an integrated system for cogeneration and district heating and cooling
A thermodynamic assessment is reported of a proposed system, for which advanced engineering designs have been developed for integrating cogeneration with district heating and cooling. The system was developed by Edmonton Power for the city of Edmonton, Alberta, Canada. Energy and exergy analyses are used to attain a more complete thermodynamic understanding. The results provide a better ...
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Utilisation of deep geothermal energy for heating purposes
The Hot-Dry-Rock-(HDR) technology allows a location-independent utilisation of geothermal heat, because aquifers in deep formations, i.e. layers filled with water, are not necessary. The flow paths for the circulating water in a depth of 4 km are created by hydraulic fracturing of existing gaps. Due to the fact that this new technology is quite cost-intensive, high annual load duration of the ...
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Free eguide explains latest changes to heat network UK regulations
Community heating specialist Switch2 Energy Limited has published a guide to the latest legislative changes affecting the UK's communal energy and district heating schemes and what they mean for heat suppliers. Important updates to the Heat Network (Metering and Billing) Regulations 2014 have been revealed by the new Department for Business, Energy and Industrial Strategy (BEIS). Simon ...
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Q&A: The world’s eyes turn to Minnesota on district energy
Frank Jossi reports in Midwest Energy News that for the second time in a little more than a decade St. Paul is hosting an international conference on district energy. Ken Smith is the president and CEO of District Energy St. Paul and past Chair of the International District Energy Association. The International District Energy Association’s 107th Annual Conference will be held June ...
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First industrial application of an open absorption cycle for heat transformation in a district-heating network
The first plant for high temperature utilisation of higher heating value was realised under industrial conditions in a combined heat and power plant. The technology results in an increased heat recovery temperature and a stronger dehumidification of the flue gas. Beyond that, the use of large solution flow within an adiabatic absorber enables to combine gas scrubbing and dehumidifying. Economic ...
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Investigation of a hybrid solar and geothermal driven absorption cooling system for district applications
In this paper, a new hybrid geothermal and solar driven absorption cooling system (ACS) is proposed for low–temperature district energy applications. Two approaches are proposed in this study, namely: a) a new model for determining the specific entropy values of LiBr–water solution and (b) two new energetic and exergetic parameters, namely geothermal contribution index and solar contribution ...
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Model-based decision support in energy planning
Models have become standard tools in energy planning. Fast computers and ever improving optimisation packages now allow us to solve problems within a few minutes that were out of range 20 years ago and that 10 years ago could only be solved in several CPU-hours. Fully interactive data bank systems with standardised user interfaces and on-line data access support easy modifications and adaptations ...
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District heating points way forward for energy prepayment revolution
Ofgem, which has called energy prepayment the option of 'last resort', has announced a price cap for customers until the roll-out of smart meters in 2020. But smart metering is already being widely used in the district heating sector, where it is revolutionising prepayment and reducing energy bills. Customer friendly smart meters are fast making prepayment the first choice option for thousands ...
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The Aberdeen Heat and Power district energy schemes - Case Study
District energy schemes seemed to be the right decision for the Aberdeen City Council (ACC). They had conducted a study of its housing stock and established that the multi-storey buildings (of which they have 59 in Aberdeen) were too expensive to heat. These buildings also had lower energy ratings, thus people living in them were subject to high energy bills. In 2002, as one of the results of the ...
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Technical issues in low to medium-temperature district heating
Low-temperature district heating permits the use of energy resources formerly discarded or could not be claimed. However, its investment may be capital intensive because of equipment oversizing and temperature peaking required by conventional equipment. In classical design philosophy, flow is minimised in order to compensate some of the oversizing costs and to improve the utilisation rate of the ...
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District Heating: What Are They and How They Drive Energy Efficiency in City Councils
More than 50% of the final useful energy demand in the EU comes from the heating and cooling consumption of buildings. The installation of District Heating in cities and municipalities helps improve their energy efficiency, resulting in energy savings and reduced costs for their inhabitants. If you are thinking of setting up such a core network in your municipality, this article will help you to ...
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A Great Project Delivered in Liepaja - Case Study
Year 2022 EcoHeat Technologies (Steel Pro) delivered another biomass driven container type energy plant with a comprehensive fuel supply system. This time – in Liepaja, Karosta. The facility will deliver energy for district heating in autumn 2022. Since, in procurement we’ve been awarded with the contract, we are incredibly happy to have “LIEPAJAS ENERGIJA” as our ...
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EU to reallocate €115m for energy efficiency projects
The EU has approved reforms that will free up €115m stimulus cash to be reallocated for energy efficiency projects with an impact on economic recovery. The Industry, Research and Energy Committee of the European Parliament approved reforms yesterday to EU rules on financial assistance that will free up about €115m (£95.6m) in otherwise unspent funds. The EU funds could be used to ...
By Vital Energi
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Export opportunity for US energy efficiency?
For a long time the energy efficiency industry operated largely under the two-guys-and-a-truck-model: local businesses made up of small contractors. Then the ‘super’ energy efficiency service companies (ESCOs) emerged, big operations taking on big contracts often for government, schools or hospitals, like the $35 million deal that Pepco Energy Services signed with the Prince George's ...
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Energy waste the size of Japan
Here is a startling fact: US power plants waste more energy than many countries use, including advanced economies like that of Japan. The wasted energy is in the form of heat thrown off when power plants produce electricity. This is one of the points being brought to light by the International District Energy Association (IDEA), as it promotes new federal incentives for heat efficiency. While ...
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