M t Master project Master project Master project Inese Nagla Inese Nagla Inese Nagla G f DTU BYG Technical University of Denmark DTU BYG, Technical University of Denmark Vision S071217@student dtu dk Vision [email protected] Vision ( ) Low energy District Heating (DH) Th i f i t Low energy District Heating (DH) The main areas of improvements The main areas of improvements Building energy simulations in IDA ICE Building energy simulations in IDA ICE Building energy simulations in IDA ICE Metering system Metering system bh i i fl h h i d di • High labor costs, increases with user complains Human behavior influence on the heating demand in • Remote metering Human behavior influence on the heating demand in l b ildi • Remote metering low energy buildings • New ways of control B ildi 40% Efficient energy supply New ways of control N t iff fi d Buildings use 40% Efficient energy supply Sustainability in the 43 7 • New tariffs, fines, rewards of the total energy + Sustainability in the 43.7 39 7 of the total energy + building sector 45 39.7 2 User behavior consumption Energy conservation building sector 40 m2 User behavior consumption Energy conservation 40 h/ 35 Wh • Huge influence on energy consumption 30 kW • More information advice 30 21.4 21.5 d, Li ht t ti • More information, advice 25 and Light construction row • Motivating tariffs (max cooling of return water) 20 ma house Motivating tariffs (max cooling of return water) G d t d i 15 20 dem house • Good system design 15 gd Heavy construction single 10 ng family house Energy demand in the buildings 5 10 ati family house Energy demand in the buildings 5 Hea h ld b d d h bl Low energy buildings 0 H • Should be reduced as much as possible Low energy buildings 0 • Measurements of real consumption Typical simulation Simulation with • Measurements of real consumption (Identical Be06) realistic human (Identical Be06) realistic human Number of connected consumers to the DH network behaviour Number of connected consumers to the DH network • What is the limit when DH is still profitable? • What is the limit when DH is still profitable? Wh l di ti t h ti i ii ? • Users as suppliers Why low energy district heating is so promising? Users as suppliers If i b b fi f DH Why low energy district heating is so promising? • Information about benefits of DH • New laws • New laws Di ti t h ti t k i l ti i TERMIS fh k Utili l ll il bl h t District heating network simulations in TERMIS Optimization of the DH network Utilizes locally available heat District heating network simulations in TERMIS Optimization of the DH network • New types of pipes • waste incineration plants • New types of pipes waste incineration plants h f h id il • Supply pipe with circulation • heat from the industrial processes Supply pipe with circulation D t li d i • Decentralized pumping Renewable energy on large scale Renewable energy on large scale Energy regulations • solar energy Energy regulations • solar energy i d h ldi b h d? • geothermal energy • It is not mandatory to connect to DH – should it be changed? geothermal energy bi • From 2015 “Renewable Energy” factor of 0 8 for DH • biomass • From 2015 Renewable Energy factor of 0.8 for DH • Introduction of energy labeling for heat exchangers and pipes Lower energy (temperature) >> lower heat loss I ti t iff b l Lower energy (temperature) >> lower heat loss Twin pipes with very • Incentive tariffs by laws small diameters for • Increased energy and CO 2 tax small diameters for d dh tl Increased energy and CO 2 tax decreased heat loss E i l id ti Economical considerations • Decreased construction costs (with flex‐pipes) • Decreased construction costs (with flex‐pipes) • Available credits of more than 25 years BUT • Public institutions support individual users BUT • Public institutions support individual users …BUT • ESCO financing for changing individual units …BUT ESCO financing for changing individual units Case study – low E l Case study low energy district heating Energy supply Ah ti i ti di t dt b l i energy district heating As heating requirement is predicted to be very low in network in Lystryp • Based on renewable energy How to make DH systems low energy buildings the cost effectiveness of DH • Based on renewable energy How to make DH systems low energy buildings, the cost‐effectiveness of DH • Best available local sources competitive for areas with low systems is affected by high investment and • Several sources integrated in the common network competitive for areas with low systems is affected by high investment and i l i i h i f • Several sources integrated in the common network energy buildings?? operational costs, in comparison to the income from energy buildings?? operational costs, in comparison to the income from th d li dh t Energy storage the delivered heat Energy storage • Electricity storage and heat pumps • Electricity storage and heat pumps • Improvement of heat storage Improvement of heat storage Thank you to workshop participants: Peter Weitzmann (COWI A/S) Peter Kaarup Olsen (COWI A/S) Jens Lunding (Hillerød Kommune) Haider Al-Ali (Hillerød Kommune) Jørgen Erik Christensen (DTU) Alessandro Dalla Rosa (DTU) Thank you to workshop participants: Peter Weitzmann (COWI A/S), Peter Kaarup Olsen (COWI A/S), Jens Lunding, (Hillerød Kommune), Haider Al-Ali (Hillerød Kommune), Jørgen Erik Christensen (DTU), Alessandro Dalla Rosa, (DTU)