NO. 2 /2019 INTERNATIONAL MAGAZINE ON DISTRICT HEATING AND COOLING FOCUS SMART HEATING SYSTEM INTEGRATION Smart integration of energy and waste water Can smart cities heat themselves? Sign up to receive Hot Cool DBDH direct access to district heating and cooling technology www.dbdh.dk CONTENTS 4 THE COLUMN: SURPLUS HEAT By Bent Ole Gram Mortensen, Professor, University of Southern Denmark 6 FOCUS DIGITALISATION A KEY LEVER FOR LOW-TEMPERATURE DISTRICT HEATING By Steen Schelle Jensen, Head of Product Management Heat/Cooling Solutions, Kamstrup 9 FOCUS SMART INTEGRATION OF EN Green business and black numbers Digitalisation is the lever for an integrated and efficient energy system with district heating as its natural cornerstone. It even delivers measurable results of energy efficiency and optimised operations. Extra capacity? Heat loss 2020? Leak in building Data-dri P4 The Column By Bent Ole Gram Mortensen, Professor, University of Southern Denmark SURPLUS HEAT Many industrial enterprises have a challenge with surplus heat. The heat may originate from cooling or special processes. The heat is considered surplus when the enterprise cannot utilize it itself, an 5-10% reduction of heat loss in the district energy network Minimize energy loss in the distribution network and achieve substantial energy savings with Mentor Planner software Mentor Planner is an advanced software tool for forecasting, planning, and optimizing district energy production and distr P6 DIGITALISATION A KEY LEVER FOR LOW-TEMPERATURE DISTRICT HEATING FOCUS SMART HEATING SYSTEM INTEGRATION By Steen Schelle Jensen, Head of Product Management Heat/Cooling Solutions, Kamstrup The district heating system of the future is characterised by high efficiency and low temperatures en P7 OPTIMISING FLOW TEMPERATURES The utility itself controls and manages the flow temperature from the production side. The challenge here is knowing the actual heat demand and operating conditions to avoid or reduce safety margins and run production as close to the limit as possible while still mee P8 heat installations. Their assumption is that by comparing data from these two sources they may, through machine learning, be able to predict what will happen on the secondary side. This is a great example of the fact that because this area is still unchartered territory, asking questions and tes P9 FOCUS SMART HEATING SYSTEM INTEGRATION By Hasmik Margaryan, Engineer, Taarnby district heating and cooling company; Anders Dyrelund, Senior Market Manager, Ramboll, Troels Hansen, Energy Engineer, Ramboll SMART INTEGRATION OF ENERGY AND WASTE WATER Taarnby Forsyning, TF, is a municipality-ow P10 Moreover, as the heat production cost in the summer period is very low in the heat transmission system, it turned out to be profitable to establish ground source cooling in combination with the heat pump and thereby store cold water from winter to summer and supplement the heat from the waste w P11 ADDITIONAL INFORMATION Stage 1 Stage 2 Number of buildings no 3 11 Floor area in total m2 55 170 Cooling demand GWh 3.5 9 Cooling capacity demand MW 4.3 10.2 Expected capacity to network MW 4.3 9.2 Heat pumps cold MW 4.3 4.6 Stoage tank capacity MW 1.2 2.5 Ground P12 The system has been prepared for additional capacity in a flexible and cost-effective way, by increasing peak from the storage tank, by investing in ground source cooling and by preparing the system for a mobile temporary chiller. To avoid digging in an important road, a 160 m trench in DN300 P13 COOL AND SUSTAINABLE WITH ABSORPTION HEAT PUMPS FOCUS SMART HEATING SYSTEM INTEGRATION By Lars Sønderby Nielsen, Managing Director, Enexio Solutions Absorption technology offers a sustainable and well proven technology for district heating and cooling. With water as natural refrigerant, th P14 In a heating plant, the heat source energy can often be found as hot water from existing boiler installations. In such case, the heat source energy is in principle free, since the energy used for the absorption process is fully returned to the district heating system, only at lower temperature. P15 (unusual) warm summer of 2018, the heat price for operating the absorption chiller generator varied between 0 and 20 EUR/ MWh, whilst the electricity price saw big variations with an average of 190 EUR/MWh. Such a price scheme would give an advantage for absorption over mechanical cooling, desp P16 FOCUS SMART HEATING SYSTEM INTEGRATION By Kristina Lygnerud (PhD), Energy department manager at the Swedish Environment Research Institute (IVL) and researcher focusing on business model innovation in district heating at Halmstad University (HU) CAN SMART CITIES HEAT THEMSELVES? Urban waste P17 Other advantages are the strengthened value of green heat (compared to the 3rd generation solution) and the closer interaction with customers, who demand a tailor-made, long-term solution. So, there are evident advantages of low temperature installations in district heating, but the most import P18 FOCUS SMART HEATING SYSTEM INTEGRATION By Dirk Vanhoudt, senior researcher district heating and cooling networks, EnergyVille VITO, Belgium; Tijs Van Oevelen, researcher district heating and cooling networks, EnergyVille VITO, Belgium; Christian Johansson, CTO, NODA, Sweden NEW MANAGEMENT P19 This network also comprises decentralized heat pumps to boost the temperature of the ground water (~28C), to the required level for space heating and domestic hot water production. The network is organized in clusters of buildings, and a backbone network connecting the clusters and the mines. I P20 As explained, the vDER outputs control signals suited for the substation controllers or building management systems. This is a vital feature of the STORM controller, since this means that the existing controllers in the network should not be replaced; the STORM controller is an extra control la P21 Finally, it should be noticed that the market interaction control strategy can also be used for DHC systems without CHP, in which case the purpose is to avoid high production costs and premiere low costs. This versatility makes market interaction a powerful control strategy, and it now forms th P22 FOCUS SMART HEATING SYSTEM INTEGRATION By Daniel Møller Sneum, PhD fellow at DTU Management, Energy Economics and Regulation BARRIERS TO FLEXIBLE SYSTEM INTEGRATION OF DISTRICT ENERGY - THE COMPLETE OVERVIEW? As a policy-maker, practitioner or researcher, wouldnt it be nice with a checklis P23 Electricity market: Lack of flexibility-need (involatile prices): Weak price signals may not incentivise flexible operation. Solution: Volatility in market prices can be increased, if they reflect costs more closely e.g. by shorter bidding periods or by location. Electricity market - Fixed ele P24 OWNERSHIP Different types of ownership can make DE systems subject to various regulatory requirements. Tax- and ownership regulation disincentivising grid supply: E.g. in US, where tax-exempt universities become subject to taxation if their DE systems supply electricity to the grid. Solution: A P25 CONCLUSION When dealing with barriers to deployment of DE or to system integration, it is common to reduce this to an economic or regulatory issue (or both). This study shows that barriers to flexible system integration of district energy systems are multiple (33 identified) and different (9 ov P26 By Professor Janette Webb and Dr. Ruth Bush, Heat and the City, University of Edinburgh1 MEETING THE STRATEGIC CHALLENGES OF UK DISTRICT HEATING District heating (DH) is recognised in UK Government Clean Growth Strategy and Scottish Government Energy Strategy as a low-regrets contribution to l P27 CASE STUDY: THE CLUSTER-DENSITY APPROACH Figure 1 As shown in Figure 3, the cluster density model also has higher diversity of heat load, reducing average costs. At 20% the cluster density model connects around 40% more households than the internal approach; below 20% the ratio is even higher. P28 NORWAY Local directive planning policies and national energy efficiency standards: Local government supported market development by adopting directive planning policies and helping companies to plan strategically in relation to new property developments. Norwegian energy efficiency standards f P29 By Lars Andersen, CEO, Geotermisk Operatørselskab A/S THE LAST INVESTMENT CYCLE Throughout the world, governments and the private sector have established greenhouse gas emission targets. For example, the EU and most other European countries have set short-term targets for 2020 and 2030 for the P30 The unit production cost of geothermal energy will decrease over time as the industry gains experience and more geothermal plants are commissioned, making it more competitive as a renewable energy source. For example, experience from the shale gas industry shows that the cost of wells can be re P31 MEMBER COMPANY PROFILE AALBORG ENERGIE TECHNIK WORLD CLASS EFFICIENCY AND FUEL FLEXIBILITY Aalborg Energie Technik a/s (AET) is a leading, independent engineering and contracting company supplying biomass-fired boiler plants, power plants and combined heat and power plants in the size range o defining network efficiency An intelligent surveillance tool With the LOGSTOR Detect surveillance system you will immediately be informed of potential defects that can be repaired in time. This secures the lifetime expected for your district heating network and thereby the lowest possible Total Cos