International Journal of Sustainable Energy Planning and Management <p>The IJSEPM is an international interdisciplinary journal in Sustainable Energy Planning and Management combining engineering and social science within Energy System Analysis, Feasibility Studies and Public Regulation.<br><br>The journal is an international interdisciplinary journal in Sustainable Energy Planning and Management combining engineering and social science within Energy System Analysis, Feasibility Studies and Public Regulation.&nbsp;</p> <p>The journal especially welcomes papers within the following three focus areas:</p> <ul> <li class="show">Energy System analysis including theories, methodologies, data handling and software tools as well as specific models and analyses at local, regional, country and/or global level.</li> <li class="show">Economics, Socio economics and Feasibility studies including theories and methodologies of institutional economics as well as specific feasibility studies and analyses.</li> <li class="show">Public Regulation and management including theories and methodologies as well as specific analyses and proposals in the light of the implementation and transition into sustainable energy systems.</li> </ul> <p>The journal is approved by the Norwegian bibliometric&nbsp;<a href=";bibsys=false&amp;request_locale=en">Kanalregister</a>&nbsp;as well as its Danish counterpart&nbsp;<a href="">BFI</a>.&nbsp;</p> <p>The journal is registered/indexed in/by&nbsp;<a href=";sort=cp-f&amp;src=s&amp;st1=journal+of+sustainable+energy+planning+and+management&amp;nlo=&amp;nlr=&amp;nls=&amp;sid=AC1664C401CEF186228B39264A2A35D7.wsnAw8kcdt7IPYLO0V48gA%3a10&amp;sot=b&amp;sdt=b&amp;sl=63&amp;s=SRCTITLE%28journal+of+sustainable+energy+planning+and+management%29&amp;ss=cp-f&amp;ps=r-f&amp;editSaveSearch=&amp;origin=resultslist&amp;zone=resultslist">Scopus</a>&nbsp;(Press link to see all published articles in IJSEPM), &nbsp;<a href="">Ulrichs Web</a>,&nbsp;<a href="">Directory of Open-Access Journals</a>,&nbsp;<a href="">Sherpa/Romeo</a>&nbsp;and&nbsp;<a href="">DataCite</a></p> en-US International Journal of Sustainable Energy Planning and Management 2246-2929 <p><a href=""><img src="/public/site/images/admin/cc_88.png" alt=""></a></p> <p>Articles published in International Journal of Sustainable Energy Planning and Management&nbsp;are following the license&nbsp;<a href="">Creative Commons&nbsp;Attribution-NonCommercial-NoDerivs 3.0 Unported (CC BY-NC-ND 3.0)</a></p> <p>Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License: Attribution - NonCommercial - NoDerivs (by-nc-nd). Further information about&nbsp;<a href="">Creative Commons</a></p> <p>Authors can archive post-print&nbsp;(final draft post-refereering) on personal websites or institutional repositories under these conditions:</p> <ul> <li class="show">Publishers version cannot be stored elsewhere but on publishers homepage</li> <li class="show">Published source must be acknowledged</li> <li class="show">Must link to publisher version</li> </ul> <p>&nbsp;</p> <p>&nbsp;</p> Editorial - Smart energy systems and 4th generation district heating systems <p>This editorial introduces the 16<sup>th</sup> volume of the International Journal of Sustainable Energy Planning and Management, which addresses different angles of district heating ranging from the planning of district heating systems and economic incentives for flexible district heating plants to comparisons between low and ultra-low-temperature district heating systems and methods for determining thermal conductivity in district heating pipes.</p> Poul Alberg Østergaard Henrik Lund Brian Vad Mathiesen ##submission.copyrightStatement## 2018-05-22 2018-05-22 16 1 2 10.5278/ijsepm.2018.16.1 A spatial approach for future-oriented heat planning in urban areas The current climate protection goals will lead to unprecedented and profound changes to energy systems. The transition to a decarbonized heat supply system will be complex and the process will have deep impact on the urban subsystems (technical, economic, social and planning subsystems) with different spatial extents. For decision making in this context, the level of individual buildings provides a perspective which is too narrow. On the other hand a very broad view is also unhelpful for the local transition process. This article shows an innovative way to analyse heat demand data with the help of fuzzy logic and spatial mapping of the suitability of different heat supply systems. At the subsequent planning level, the results can be used as guard rails to make the urban planning process more consistent and transparent. Jürgen Knies ##submission.copyrightStatement## 2018-05-22 2018-05-22 16 3 30 10.5278/ijsepm.2018.16.2 Economic incentives for flexible district heating in the Nordic countries By analysing four types of district heating plants, ranging from fully integrated with an electricity system (combined heat and power and electric boiler) to no integration with an electricity system (wood chip boiler), operation and investment incentives for flexible district heating plants under current Danish, Finnish, Norwegian and Swedish framework conditions have been investigated. Hourly-based operation optimisation over 20 years using the modelling software energyPRO showed that the largest investment incentive in Finland, Norway and Sweden was for combined heat and power with an electric boiler. This is largely driven by subsidies. Conversely, the less-subsidised Danish case incentivised investment in wood chip boilers. Untaxed biomass is the major energy source in all scenarios, while electricity use is limited. Capacity component-based tariffs can eliminate operation of electric boilers, while less costly energy component-based tariffs can increase the operation of electric boilers. Heat storage was found to be a no-regrets solution for optimising operation and lowering costs in all cases. Daniel Møller Sneum Eli Sandberg ##submission.copyrightStatement## 2018-05-22 2018-05-22 16 27 44 10.5278/ijsepm.2018.16.3 Economic comparison of low-temperature and ultra-low-temperature district heating for new building developments with low heat demand densities in Germany District heating risks to lose competitiveness the lower the linear heat density of a district is. The distribution network needs to be highly efficient in order to ensure economic feasibility. The heat distribution temperatures are crucial to keep distribution heat losses as low as possible. For a new development in Germany consisting mainly of single family houses, two district heating networks at different supply temperature levels are examined in terms of economic and efficiency aspects. Depending on the required temperature level and temperature difference between supply and return the needed volume flow differ. Consequently also the required pipe diameter is affected. The impact of design temperature and operating strategy on the economic feasibility of the district heating network is investigated. Isabelle Best ##submission.copyrightStatement## 2018-05-22 2018-05-22 16 45 60 10.5278/ijsepm.2018.16.4 Development of an empirical method for determination of thermal conductivity and heat loss for pre-insulated plastic bonded twin pipe systems <p class="Els-body-text">Pre-insulated twin pipe systems (PTPS) for heat distribution offer advantages for heat supply companies. Trench dimensions for heat supply systems of District Heating (DH) networks might be reduced using these pipe systems. This reduces costs in civil engineering. Additionally heat loss of the DH network may be reduced, that decreases operational costs of these systems. On the other hand, operational heat losses of PTPS significantly differ in many cases from theoretical heat loss of PTPS. This may inhibit the application of this technology in DH networks.</p><p class="Els-body-text">Against this background, a standard measurement procedure of thermal properties of PTPS shall be developed, validated and tested at FFI. These tests shall be based on standard measurement procedures for single pipe systems described in EN ISO 8497 and modified for PTPS. Within this context, preliminary tests are done at FFI. Numerical simulations of heat loss are done at IGTH and iteratively fitted to data generated from measurements at the same time.</p><p class="Els-body-text">Numerical simulations of stresses occurring due to operational temperatures for PTPS are done in a second step. Internal stresses due to temperature gradients within PTPS as well as external stresses due to interactions of PTPS with the bedding material and ground will be examined. In addition, interactions of bedding materials, operational conditions and heat losses in situ will be assessed.</p><p class="Els-body-text">First results obtained are presented in this paper. Focus of this paper is on development of a standard measurement procedure for thermal properties of PTPS, as well as results of numerical calculations regarding heat loss of these systems. One goal of this project funded by the “BMWi – Federal Ministry for Economic Affairs and Energy”, is to discuss and mirror project results in order to modify existing standards, e.g. EN 15698, EN 15632 and EN 13941. Defined quality standards for PTPS, verified by standardized measurement procedures for PTPS, will increase the acceptance of PTPS in the DH sector. This supports small and medium sized enterprises (SME) using and producing PTPS.</p> Georg Konrad Schuchardt ##submission.copyrightStatement## 2018-05-22 2018-05-22 16 61 74 10.5278/ijsepm.2018.16.5