N0. 4 / 2014 INTERNATIONAL MAGAZINE ON DISTRICT HEATING AND COOLING OPERATION & MAINTENANCE DBDH - direct access to district heating and cooling technology www.dbdh.dk CONTENTS 4 THE COLUMN 6 LOWER TEMPERATURES FOR DISTRICT HEATING SYSTEMS IN THE FUTURE 9 GREEN PIPELINE WITH HIGH DEGREE OF DIFFICULTY 12 COMBAT WEAR IN THE USE OF BIOMASS 14 THE GEOTHERMAL SYSTEM IN SØNDERBORG WORKS WELL AFTER A THOROUGH WORK OVER 16 CLEANING THE AIR WITH BIOMASS 19 BEN DISTRICT HEATING FROM A-Z RELY ON 50 YEARS OF EXPERIENCE IN ALL DISTRICT HEATING APPLICATIONS 16 CHP POWER PLANT SUB-STATION BOILER HOUSE CONSUMER CONNECTIONS MAIN PUMPS DISTRIBUTION PUMPS BOILER SHUNT PUMPS PLATE HEAT EXCHANGE FLOW FILTER PUMPS PRESSURE HOLDING SYSTEM LULL HEAT PUMPS P4 THE COLUMN By Lars Gullev, Managing Director VEKS, and Chairman of DBDH PREVENTIVE MAINTENANCE - A STRATEGIC FOCUS AREA These years, some very large investments are made in the energy sector - including the district heating sector. Investments in, for example, production plants, SCADA systems, 10% better heat transfer using our patented Micro PlateTM technology. Discover a heat exchanger uniquely developed for district heating Compatibility and forward-thinking are at the core of intelligent design. With the next generation of Danfoss plate heat exchangers, weve developed revolutionary P6 By Hans-Henrik Høgh, Albertslund Forsyning and Theodor Møller Moos, Senior Project Manager COWI LOWER TEMPERATURES FOR DISTRICT HEATING SYSTEMS IN THE FUTURE Low-temperature district heating is realistic and will provide energy savings and reduce dependence on fossil fuels. Today in Denmark, th P7 Initiatives and results In the report, a number of results from test operations on small and large scales have been collected. Some of the key results are outlined below: 75 detached houses from the 1970s in the Copenhagen suburb Høje Taastrup, where under floor heating was already installed, w P8 Some areas may require a longer transition period than others, as necessary adaptations will vary with the age and type of the building. In Albertslund the change is enabled by supplying the new sections of the network to serve the converted buildings via local shunt installations, where return P9 GREEN PIPELINE WITH HIGH DEGREE OF DIFFICULTY Huge district heating project in Rotterdam encompasses significant challenges and significant achievements By Managing Director Verner Rosendal and Head Technical Department Jens Rasmussen of isoplus Denmark A/S The second-largest city in the Nethe P10 Environment, archaeology and bombs Environment, history and ... explosives these are also items that have been high on the lists of the planners. Extensive considerations have been made for the flora and fauna in the area. The work is taking place with regard to the breeding seasons, etc., and P11 Backup ready As mentioned above, it is expected that approx. 95,000 residences and businesses will be able to connect to the sustainable heating from Leiding over Noord which began on 1 October. However, if unexpected problems or delays should arise, district heating customers in Rotterdam and P12 FOCUS OPERATION & MAINTENANCE By Claus Michael Kjaer, Managing Director, ABRATEK COMBAT WEAR IN THE USE OF BIOMASS The use of wear resistant solutions has become an essential part of running a biomass fired power plant. This puts extra focus on optimizations through the use of advanced mater P13 grinding technique has been developed by ABRATEK in order to solve this. Using vacuum bonded alumina in the housing and end plates, and brazed tungsten carbide on the rotor leaves you with a perfect solution in these circumstances. The result is a numerous lifetime extension of your units. The P14 FOCUS OPERATION & MAINTENANCE THE GEOTHERMAL SYSTEM IN SØNDERBORG WORKS WELL AFTER A THOROUGH WORK OVER by Jette Friis OBróin, Communication advisor Ross Engineering has developed a new less complicated and less expensive method based on experience from the oil and mining industry to make a P15 One of the most challenging aspects of the operation was pulling the ESP (submersible pump) from the production well and setting it in the injector well for establishing an efficient flow regime of up to 350 m3/h for the second step of the operation. district heating companies, says Erik Wolff P16 FOCUS OPERATION & MAINTENANCE CLEANING THE AIR WITH BIOMASS By Jens Dall Bentzen, CEO, Dall Energy Warwick Mills, a factory in USA, have installed and commissioned a Dall Energy biomass plant. Now the fuel bill and CO2 emissions are reduced, and local jobs have been created in the local for P17 Dall Energy and Warwick Mills made an agreement: - Dall Energy would design a plant for Warwick Mills and assist Warwick Mills with the project. - Warwick Mills would pay a license fee for the technology + consultancy fee for assistance in the project. Preparing the project Then the plant was d P18 Operating strategies of the plant The biomass plant at Warwick Mills has two main purposes: - Destroy VOC from factory - Produce steam to factory The amount of VOC-loaded air and the need for steam are not related, so a new strategy of operating the plant was developed: - When the factory needs P19 BENEFIT FROM PROACTIVE MAINTENANCE FOCUS OPERATION & MAINTENANCE By Business Manager Peter Esbjerg Hejn, Ramboll Energy Ramboll Energys Life Cycle Maintenance concept ensures that maintenance is incorporated in the early design phase of a project. Over a 30-year period, maintenance costs ma P20 in a well-defined improvement programme in order to achieve maximum utilisation of the few resources we have available. Goal set, organisation ready, deploy! An engineering manager at a large Nordic company said to me a few years ago: We employ about 20 men in the engineering department who ar P21 FOCUS OPERATION & MAINTENANCE By Allan N. Hansen, Technical Manager, LOGSTOR HOW TO ENSURE A LONG SERVICE LIFE AND A LOW HEAT LOSS FOR A DISTRICT HEATING DISTRIBUTION NETWORK Todays pre-insulated distribution network has an expected service life of 30 years, and it may even last up to 50 yea P22 Treated district heating water To prevent internal corrosion of the pipes it is imperative only to use treated DH water, i.e. water with a low oxygen content and a high PH value (9.5-10). There will always be a certain water loss in a DH distribution network, so makeup water must continuously b P23 wires i.e. the PUR foam. If water is present in the PUR foam, then the impedance of the foam will also change. Contrary to the resistance measurement it is also possible to locate a fault by means of impedance measuring by calculating the distance to the fault on the basis of the speed of the p P24 An efficient DH distribution network is a network in which the temperature difference between the temperature from the DH plant to the end user is as little as possible, so it is possible to lower the temperature in the entire distribution network and thereby minimize the total energy loss. It P25 SUCCESSFUL DISTRICT HEATING COLLABORATION By Deputy Director Jan Olsen, Nordforbraending, and Engineer René Salomon, Grontmij It started with a bicycle ride through the forest of Rude Skov and ended up with a successful project in the Copenhagen suburb of Birkeroed. During the last six years, P26 The projects success was measured on the bottom line. It was completed within the allocated budget of DKK 270 million and within the overall time schedule. Moreover, during the implementation, it was agreed to extend the project to include three more areas. Out of the total number of potential P27 NEW MEMBER OF DBDH GOTTLIEB PALUDAN ARCHITECTS Gottlieb Paludan Architect provides consultancy within infrastructure, buildings and landscape. The company is close to 100 employees and located in offices in Copenhagen and Aarhus. For half a century, energy and utilities have played a central r P28 MEMBER COMPANY PROFILE: TELDUST he intensified focus on de-carbonization and transition into utilizing sustainable energy sources requires innovative green solutions and technologies. The multinational filter manufacturer, Teldust, offers such technologies. With more than 30 years of experienc P29 supplied filters for a district heating plant in Eastern Jutland. The facility proved complex to install the filter due to narrow corridors and pillars. Teldust delivered the filter in several parts rather than the usual amount of parts. The custom-designed filter enabled the lifting of the fil P30 LIST OF MEMBERS Aaen Consulting Engineers Phone +45 8617 5055 Consulting engineers and planners www.aaenas.dk ra@aaenas.dk Dall Energy Phone +45 2987 2222 Aalborg Engineering Phone +45 9631 3950 Supplier of boilers and boiler systems Fax +45 9631 3951 ae@aalborg-engineering.dk ww P31 HOFOR Phone +45 3395 3395 Copenhagen Energy Fax +45 3395 2020 hofor@hofor.dk www.hofor.dk Ross Engineering Hydro-X Phone +45 9828 2111 Boiler water treatment Fax +45 9828 3021 info@hydro-x.dk www.hydro-x.dk Saseco Høje Taastrup Fjernvarme Phone +45 4355 3010 Municipal district h Ideal solutions to meet your needs... Reliable and fully documented joint welding with Monitor your district heating system 24/7 with Mediegruppen 4273 Calculate the best solution for your project using Customers requiring efficient pipe systems drive LOGSTORs development We are a knowledge-bas