A virtual event. Live broadcast from Vilnius

Intelligent Energy Lab


September 21-23, 2021

Curating a sustainable future today

The rapidly changing climate demands urgent and tangible solutions to ensure sustainability for our environment in the future. Technological progress in finance, medicine and energy is speeding up, relying in large part on global experts’ views on the existing problems. And now, more than ever, experts’ gaze is focused on the sustainable future.

Intelligent Energy Lab Hackathon is a three-day professional challenge that will take place on September 21-23, 2021, together with the annual Energy Tech Summit event. The hackathon will be held virtually, connecting district heating and cooling teams from energy companies, start-ups, expert managers, engineers and IT product developers.

About the Hackathon


To generate high-value actionable digital and energy engineering solutions and implement the already existing innovative ideas in one of Europe’s greenest capitals.


Representatives from leading European and global energy corporations, district heating and cooling companies – managers, engineers, IT product developers, scientists, researchers, experts and innovative start-ups operating in the field of sustainable energy.


A virtual space connecting remote participants via digital channels.


September 21-23, 2021.



From tech developments in the management of biofuel boilers to the revolution in converting electricity to heat. The key to climate-friendly heating and cooling process is unlikely to be a new, undiscovered energy source. Rather, it is going to be one of the untapped resources that are already around. Why don’t we start with residual heat?


Transition from 3rd to 4th generation district heating

The 4th generation central heating system integrates all available energy sources, renewable ones, and surplus energy from other sources. Moreover, energy accumulation and storage, as well as producer-user interactions ensures system flexibility and efficiency. The use of lower-temperature water leads to the reduction of heat loss in networks, which makes this kind of district heating become more accessible for all. When transitioning from the 3rd to 4th generation district heating system, it is important to simultaneously coordinate and ensure the smooth functioning of all existing systems and facilities. The transition from the current 3rd generation DH is a complex task that requires addressing the following aspects:

  • How to ensure a sufficient heat transfer with a lower fluid temperature?
  • How to adapt building heating systems for operation with lower heat transfer fluid temperatures?
  • How to manage a smooth transition from higher to lower temperatures?
  • What are the possible alternative production sources that do not use fossil fuels?
  • How to ensure protection against Legionella bacteria?


Energy prosumers

Over the last decade, the movement towards net-zero has picked up at a rapid pace worldwide. Lithuania is no exception, having millions of renewable energy users across the country. With the help of solar power plants from renewable energy sources, an increasing number of organisations and independent users are producing electricity for their own needs. There’s no doubt that energy prosumers creates countless opportunities.


Why not buy residual heat together with frozen vegetables from the supermarket? Or maybe we can ensure ourselves heat for the production of hot water from a nearby data centre or an underground sewage network?


Heat storage

Thermal energy production from renewable energy sources is asynchronous. In most cases, the peaks in energy production do not coincide with the peaks in heat consumption. For this reason, measures are required to rebalance it.


One of the most convenient ways is heat storage tanks. These can be used for the accumulation of excess electricity produced from renewable energy sources. Thus contributing to the rebalancing of the power supply system. It is important to address the following challenges:

  • Assess the potential of heat produced from renewable energy sources.
  • Determine the optimal need for seasonal, medium-term and short-term storage tanks.
  • Review possibilities of re-use of old infrastructure.
  • Examine which direction of heat accumulation to choose: centralisation (central, general) or decentralisation (accumulation at the customer, distribution in the network).


Recycling is more than just a buzzword actively spreading worldwide. Supply chains, resource management and recycling potential are key opportunities for the resilient future.


Phthalates removal from sewage sludge

One of the main challenges faced by water treatment companies is the recycling of sewage sludge which contains heavy metals, phthalates and bacteriological contamination. Doctors globally warn that phthalates have a strong negative effect on the endocrine system. Phthalate-contaminated environment may increase the risk of infertility, birth defects, cancer, diabetes, and obesity.


How to remove phthalates from sewage? How to recycle sludge in an environmentally friendly way and adapt it to secondary use?


The composition and application of biomass ash

Various biomass fuels are burned in Lithuanian boiler houses. Biomass incineration inevitably generates a lot of process waste – ash. For example, the main CHP of VŠT generates approximately 18-20 tons of ash per day. It’s a lot of process waste, but if used wisely, it could be of benefit. Biomass ash could be used in agriculture or forestry and enrich the soil with macro- and microelements. It could also be used in the building and road construction sectors. However, macro-elements and heavy metals in the ash content are subject to maximum concentration levels, which may not be exceeded in pursuance of the secondary use of the ash.


How can biofuel ash content be effectively investigated, processed and used in agriculture or other areas?


Agriculture in architecture

Intensive urban development leads to a reduction of green spaces. One of the ways to restore it, is to turn roof spaces into nature or farm areas. Each plant-covered roof can become a part of this movement to restore the endangered nature. A building with a green roof improves heat insulation: the accommodation retains heat in winter, and keeps it pleasantly cool in summer. It also creates a series of ecological benefits such as additional oxygen release, air humidity regulation, dust neutralisation and rainwater utilisation. Cities can feed themselves, and create space for flora and fauna, gardening or even beekeeping.


How to compensate for lost green areas in Vilnius and set up Babylon gardens?


If we could monitor the cyclicality, power, and analyse potential use cases of residual heat, how many resources would we conserve? What are the safeguards that can help us use the infrastructure sustainably and make heat or water leaks a thing of the past?


Innovative tracking of heating grid

In the long run, pipes wear out, and heat leakage is a fairly common problem for older infrastructure nearing the end of its service life (this is particularly the case for heat networks laid in impassable underground channels). In order to assess the real state of pipelines, it is necessary to monitor networks, humidity levels in cameras, ensure early detection and localisation of energy leakage. Reduced humidity content in underground channels extend the life cycle of a pipeline network. Measurement of the wall thickness of the pipe allows changing the worn networks up to a specified limit.


The key question is how to ensure an effective network monitoring system?


Mapping of residual heat in Vilnius city

A residual heat map is a very useful tool to understand the potential of unused waste heat. The analysis of the heat-cooling economy carried out within the framework of the STRATEGO project of the European Union (EU) showed that the heat produced by factories and power plants alone, but not used and discarded as residual heat, would satisfy the entire heat demand of buildings in Europe and in some cases even exceed it. Heat mapping is a great way to assess the geographical location and potential of waste energy in the city. Many layers of analysis can provide a fairly complete picture of the supply, which facilitates energy planning and investment in infrastructure.


How to create a convenient and effective residual heat map of Vilnius city?


Energy consumption barometer for buildings

Publicly available data on the energy consumption of buildings along with the possibility of comparing them with data from similar facilities (the average and the most efficient renovated and the non-renovated buildings) would help the public access the state of the building and energy costs. This would encourage the user to look for ways and means to reduce the costs of heat energy and housing maintenance. 


But how to compare the energy consumption data of buildings?


How do you move around the city sustainably as an individual, and how does this process change with thousands of people involved? Have metropolitan areas already reached the limits of adequate mobility?


Low-pollution areas in the city

The European Union (EU) cares about the well-being of the planet and is implementing a low-emission mobility strategy as well as the development of the infrastructure for alternative fuels. In this context, municipalities in Lithuania have to establish low emission zones in cities by 2023, where only zero-emission traffic is allowed. The promotion of environmentally friendly vehicles poses challenges not only for the development of green public transport, there are recharging points for electric vehicles to think of, the availability of alternative fuels in cities but also the identification, administration and technological aspects of low-emission zones.


How do we ensure that this is the space will only be for the vehicles using green energy?


Multi-function charging

An environmentally friendly lifestyle is gaining ground in Lithuania. The number of clean energy-using electric cars, electric and traditional bicycles, scooters and other environmentally friendly vehicles are increasing on the streets. What if not only charging infrastructure for electric vehicles but also electric bicycles, scooters was developed in the city? Or even if wireless charging modules were installed on roads, paths or in one of the traffic lanes? The battery of the vehicle would charge just while driving on this lane!


How do we successfully develop environmentally friendly transport charging infrastructure in Vilnius?


Estimation of free parking space

There are thousands of parking places on the streets of Vilnius, but searching for a free parking space often takes time, which also leads to an increase in CO2 emissions. In order to reduce these undesirable factors, one should know how many parking places are available in a given place at a given time, for example, in Zverynas neighbourhood on a working day at 5 p.m.


What solutions would help to estimate the availability of parking places in real-time?


Peter Anderberg, Heat Academy

Peter Anderberg

Founder & CEO @ The Heat Academy

Vilius Stanislauskas, VŠT

Vilius Stanislauskas

Head of Automation and Electrical division @ Vilniaus šilumos tinklai

Vytautas Šiožinys, Energy Advice

Vytautas Šiožinys

CEO @ Energy Advice

Zenius Rinkevičius

Zenius Rinkevičius

Leader of Engineer team @ Vilniaus šilumos tinklai

Gytautas Kaulakys, VŠT

Gytautas Kaulakys

Head of Technological Division @ Vilniaus šilumos tinklai

Edvinas Pakalnickas, Head of IT at Telecentras. Green Data

Edvinas Pakalnickas

Head of IT @ Telecentras

Tomas Nickus, Susisiekimo paslaugos

Tomas Nickus

Mobility expert, Board member @ Susisiekimo paslaugos

Paulius Grigaliūnas, Sweco

Paulius Grigaliūnas

Project Manager @ Sweco

Gintarė Janušaitienė, KR susisiekimo ministerija

Gintarė Janušaitienė

Advisor of Future Mobility Policy Group on Sustainable Mobility @ LR Ministry of Transport and Communications

Renatas Kandrotas, Blue Oceans PR

Renatas Kandrotas

Junior Account Manager @ Blue Oceans PR

Andrius Balsys, MITA

Andrius Balsys

Innovation Specialist @ Agency for Science, Innovation and Technology

Žilvinas Giedraitis, Contrarian Ventures

Žilvinas Giedraitis

Investment Analyst @ Contrarian Ventures

Patrikas Feiferas, Contrarian Ventures

Patrikas Feiferas

Investment Analyst @ Contrarian Ventures

Kęstutis Paulavičius, Danfoss

Kęstutis Paulavičius

Project Manager @ Danfoss

Marius Pastarnokas, Uponor

Marius Pastarnokas

Director @ Uponor

Aurelijus Rinkevičius, VU

Aurelijus Rinkevičius

Chair of Experimental Nuclear and Particle Physics Center @ Vilnius University

Neringa Dubauskiene

Neringa Dubauskiene

Lecturer @ Kaunas University of Technology

Frank Levinson, PHOENIX

Frank Levinson

Venture Partner and co-founder @ Phoenix Venture Partners (PVP)

Vytautas Budreika

Vytautas Budreika

@ Public Institution Lithuanian Energy Agency


Paulius Martinkus

Paulius Martinkus

Chief Strategy and Business Development Officer @ Vilnius District Heating Company (Vilniaus šilumos tinklai, AB)

Eglė Radvilė

Eglė Radvilė

Author of Vilnius Digital Strategy, Digital Train board & Harvard Digital Program member

Peter Anderberg, Heat Academy

Peter Anderberg

Founder & CEO @ The Heat Academy

Tomas Nickus, Susisiekimo paslaugos

Tomas Nickus

Mobility expert, Board member @ Susisiekimo paslaugos

Rokas Pečiulaitis, Contrarian Ventures

Rokas Pečiulaitis

Founding & Managing Partner @ Contrarian Ventures

Marius Aleinikovas, Lietuvos agrarinių ir miškų mokslų centras

Marius Aleinikovas

Deputy Director for Institute of Forestry Activities Lithuanian Research Centre for Agriculture and Forestry


Hackathon winners will be awarded a prize worth 200,000 euros! The winning team will get the opportunity to settle in Vilnius City Innovation Industrial Park, sign a long-term cooperation agreement with Vilnius City and establish in a land plot at VCIIP with fully developed infrastructure to create solutions that foster change.

In addition, the winners will be awarded money prizes:
1st place – 1 000 EUR
2nd place – 700 EUR
3rd place – 500 EUR



Heating and








If the answer is yes, then we encourage you to register. 

Whether you are representing your company, gathering your own team, or joining as an independent expert, sign up for the hackathon using the registration form.

Teams of 4-5 members can be formed in advance. Individuals will be assigned to teams randomly.

Registration closes on September 16, 2021.

We will contact the selected teams by September 17, 2021.



4:00-4:15 PM
Opening remarks. Welcome speeches from the host and special guests: Valdas Benkunskas, Deputy Mayor at Vilnius City Municipality and Gerimantas Bakanas, Head of „Vilniaus šilumos tinklai“
Hackathon challenges introduction
4:15-4:25 PM
Challenge 1: Heating & Cooling Introduced by Paulius Martinkus, Chief Strategy and Business Development Officer @ Vilnius District Heating Company (Vilniaus šilumos tinklai, AB)
4:25-4:35 PM
Challenge 2: Circular Economy Introduced by Domantas Tracevičius, Circularity economist and EU climate pact ambassador, Head of VšĮ Žiedinė ekonomika
4:35-4:40 PM
Musical break
4:40-4:50 PM
Challenge 3: Green data Introduced by Stasys Savilionis, Data Development Manager @ Plan of Vilnius (SĮ „Vilniaus planas“)
4:50-5:00 PM
Challenge 4: Green Transport Introduced by Dr. Jonas Damidavičius, Head of Sustainable Mobility @ Connecting Services (SĮ „Susisiekimo paslaugos“)
5:00-5:05 PM
Teams introduction
5:05-5:10 PM
Mentors introduction
5:10-5:15 PM
Jury introduction
5:15-5:20 PM
Closing remarks


10:00 AM - 12:00 PM
Team work
12:00-1:00 PM
Lunch break
1:00-3:00 PM
Mentoring sessions
3:00-6:00 PM
Team work


10:00 AM - 1:00 PM
Team work
1:00-2:00 PM
Lunch break
2:00-2:20 PM
Event livestream starts
2:20-4:20 PM
Pitching time: project presentation
4:20-4:50 PM
Announcing the winners: awards and closing remarks

*EEST (UTC +3)

Event organizer

Event initiator

Event Partner