Milano 16/11 - Workshop Tecnico

Transcription

1 Milano 16/11 - Workshop Tecnico Reti di Teleriscaldamento Smart, Rinnovabili e Flessibili Case Study Lodi District Heating

2 LINEA RETI E IMPIANTI Gruppo LGH LGH operates in the sectors of gas, electricity, waste management and district heating: the customer base accounts for over a million inhabitants in 250 municipalities in the provinces of Brescia, Cremona, Lodi and Pavia. Linea Reti e Impianti is the Company that operates the 4 DH systems of the group: Cremona, Lodi, Crema* (CR) and Rho* (MI), full controlled by LGH DH data: over 9,000,000 m3 heated, 80,000 equivalent inhabitants served PV LO BS CR * Trough controlled companies (SCCA Crema Steam Rho) LRI as of Q1-2016

3 LODI DH SYSTEM History of the system 2003: Feasibility and Project 2004: Construction of the network and the DH / CHP plant September: Commissioning of the system October: Start of continuous service CHP / DH plant before the programme of modernization: a CHP unit: gas-fired reciprocating engine 3.86 emw, 3.86 thmw 3 auxiliary gas-fired boilers: total 29 MW (2x11 MW + 1x7 MW) a pumping station with 4 variable speed pumps The network serves the south-west part of the City: built with pre-insulated pipes with DN range from 300 to 40 total length was approximately 12 km of double pipes (2013) about 100 substations from 50 to 1000 kw (2013)

4 THE PROGRAMME OF MODERNIZATION Why? European energy scenario has changed in a few years (2000 VS 2010) Fast growth of RES / Fall of electricity prices More attention on RES and energy efficiency from Customers Keystones: Implement different projects, with a common goal Best practices around Europe as inspiration Main Projects: Network Optimization with Substations Remote Control Built a new Thermal Energy Storage System Transition to RES: connected a CHP biomass plant Maintenance actions targeted not only on reliability, but also on efficiency

5 DIFFERENT PROJECTS A COMMON TARGET S u b s t a t i o n s r e m o t e c o n t r o l The idea was to apply Demand-Side Management technics to control the heat load of substations, with two main goals: Optimization of peak-shaving effect, which coupled to Thermal Energy Storage System increased reserve margin of the plant (-30% peak) Lower operating temperatures: supply temp. from 118 C to <110 C, return form 68 C to <60 C, maximizing heat recovery from existing CHP and biomass plant, and therefore lowering cost of heat Biomass CHP Plant Owner: LODIENERGIA (full private ownership) Location: Cornegliano Laudense (LO) Technical Data: - Organic Rankine Cycle (Turboden) - 1 emw / up to 5 thmw - Operating Temperatures of the network connecting the two plants: 115 / 85 C M a i n t e n a n c e a c t i o n s o n e x i s t i n g e q u i p m e n t After almost 10 years of activities, part of the equipment need a major overhaul New pump motors with new IE3 class New Low-NO X burners for the boilers T h e r m a l E n e r g y S t o r a g e S y s t e m The project of TES system became full operative in the first quarter of The aim of the project was to allow an increase of the over-all efficiency of the existing gas-fired CHP unit and the biomass plant. The system (2 x100 m 3 tanks) is designed to storage up to 10 MWh, with a peak charge/discharge of 5 MW T r a n s i t i o n to R E S During 2012, an agreement have been achieved for the recovery of the heat from the CHP biomass plant owned by a group of entrepreneurs. The two plants were connected, with a substation placed in Lodi District Heating Plant, in continuous service from April The biomass is secondary bio fuel, such as residues from forest maintenance.

6 0% 0% 0% 161 0,47 11% 67% 0, % 70% 1,06 0,96 0, % 76% 77% ENVIRONMENTAL ACHIEVEMENTS FP,DH,NREN KP,DH,NREN RDH CHP UNIT OVERALL EFFICIENCY time series 2008/952/EC threshold System Energy Efficiency, Emissions and Environmental Benefits Δ f P,dh,nren Primary energy factor % K P,dh,nren Greenhouse gas emission [kg CO 2 /MWh Hi ] % R dh Renewable and surplus heat fraction 0% 44% n.a. SO 2 Gas emissions [tonne] negligible 3.6 n.a. NO X Gas emissions [tonne] %

7 OTHER ACHIEVEMENTS The programme implemented demonstrates a feasible and easily replicable approach to convert an existing system into a more sustainable and efficient one LODI DH is now an «Efficient District Heating» as defined by 2012/27/EU Directive «Award of Excellence» at the Global District Energy Climate Award 2015 in the category «Modernisation» Most relevant: the increase of efficiency and sustainability has allowed a new programme of expansion: the mail goal is now doubling the size of the network compared to 2013

8 PROGRAMME OF EXPANSION distributed generation Network >2016 Biomass Heat Recovery P T H Plants P: Original Plant (CHP / boilers / TES) B: Biomass CHP Plant T: Integration Plant (TES / boilers) H: CHP Plant (2016) B

9 LODI DH SYSTEM 2015/16 3 Plants (+ biomass): Original CHP/DH Polo Universitario plant 3 auxiliary gas-fired boilers: total 29 MW (same as 2013) 2 new CHP unit: gas-fired reciprocating engine 3,300 ekw ekw (2016) Thermal Energy Storage (10 MWh) 5 MW heat recovery from Biomass CHP plant New Tribunale plant (2015) Thermal Energy Storage (20 MWh), ready to commissioning 2 auxiliary gas-fired boilers: total 18 MW (2016) New Ospedale plant (2016): CHP gas-fired engine (1,500 ekw) High integration with the Hospital (direct sell of electricity, Sistemi Efficienti d Utenza ) Expansion of the network (2015): total length is approximately 20 km of double pipes about 180 substations (100 in 2013, +80%)

10 NEW CHALLENGES R&D on geothermal: CHP + heat pumps + seasonal storage Expansion target reviewed: from max 24,500 to >30,000 EQUIVALENT INHABITANTS SERVED

11 Contact Us: Linea Reti e Impianti srl Viale Trento e Trieste, CREMONA Luca VAILATI Lodi District Heating B.U. Manager lodi@linea-ri.it

12 OTHER DH SYSTEM With LRI as operator CREMONA in operation from 1985 WTE + CCGT-CHP + biomass + gas-fired boilers > 5,400,000 m3 heated RHO (STeAM, from Jan/16) Two separated system, in operation from 2001 and 2006 Both with Gas-fired engines CHP + boilers One system is located in a chemical plant (steam + electricity facilities) > 1,000,000 m3 heated CREMA (SCCA, from July/15) in operation from 2009 Gas-fired engines CHP + boilers + TES > 1,000,000 m3 heated