Please note! Course description is confirmed for two academic years, which means that in general, e.g. Learning outcomes, assessment methods and key content stays unchanged. However, via course syllabus, it is possible to specify or change the course execution in each realization of the course, such as how the contact sessions are organized, assessment methods weighted or materials used.


-Understand system level approach to thermal energy storage between Power plants, Industry, Community and building level
-Can prepare fundamental heat and mass balances of thermal energy storages
-Connect the need for thermal energy storage created by both RES-Electricity and RES-Heat
-Compare functioning of different energy storage technologies & materials
-Able to characterize energy storage by technology, temperature, and timescale
-Apply thermal energy storages for a case study

Credits: 5

Schedule: 08.03.2021 - 26.05.2021

Teacher in charge (valid 01.08.2020-31.07.2022): Annukka Santasalo-Aarnio, Annukka Santasalo-Aarnio

Teacher in charge (applies in this implementation): Kari Alanne, Samuel Cross, Annukka Santasalo-Aarnio, Annukka Santasalo-Aarnio

Contact information for the course (valid 01.02.2021-21.12.2112):

Course responsible Teacher: Sam Cross (

Course asssitant: Sampson Tetteh (

Responsible Professor: Annukka Santasalo-Aarnio (annukka.santasalo@aalto.f)

CEFR level (applies in this implementation):

Language of instruction and studies (valid 01.08.2020-31.07.2022):

Teaching language: English

Languages of study attainment: English


  • Valid 01.08.2020-31.07.2022:

    This course introduces system level approach to thermal energy storage (TES), considering the fundamentals of TES, and how it can improve the sustainability of energy systems. TES is introduced by assessing the need for its application, including excess heat from industrial and energy sector installations, production and demand mismatch (especially with RES production) and the role of consumer side incentive such as dynamic electricity and heat tariffs. A common approach is taken to all TES technologies emphasizing the importance of temperatures and timescale (seasonal vs short term). The use of TES at different levels is
    then assessed as follows:
    A. Power plants, Industrial level, including use of DH network for storage
    B. Community level e.g. ATES, BTES, CTES, PTES
    C. Buildings e.g. Thermal mass, phase change materials, Chemical storage, DSM with HP ground heat storage (rock/soil)

Assessment Methods and Criteria
  • Valid 01.08.2020-31.07.2022:

    Case studies, Exercises, Project

  • Applies in this implementation:

    The course will be graded so that

    Personal tasks max 50 p.

    Group tasks max 50 p.

    Total points 100 p. (60 p. needed for passing the course)

  • Valid 01.08.2020-31.07.2022:

    Contact hours (12 x 2 h) = 24 h

    Excursion = 6 h

    Individual assignments and reading = 60 h

    Project work = 44 h

    Assessment session = 3 h 


Study Material
  • Valid 01.08.2020-31.07.2022:

    Reading material provided during the course

  • Applies in this implementation:

    All available on MyCourses pages.

  • Valid 01.08.2020-31.07.2022:

    Bachelor-level studies

Registration for Courses
  • Valid 01.08.2020-31.07.2022:


  • Applies in this implementation:

    The course will be organized at Online sessions (link provided at MyCourses). 

    There is a course excursion organized outdoors at Otaniemi with small groups, more information on this at the course pages. If you are not in Finland, other options will be offered.

SDG: Sustainable Development Goals

    7 Affordable and Clean Energy

    9 Industry, Innovation and Infrastructure

    11 Sustainable Cities and Communities

    13 Climate Action


Details on the schedule
  • Applies in this implementation:

    The course will start on 8th March 2021 and will run at then END of April (though 4th and 5th periods). There is no teaching at Easter Monday nor at exam week at 4th period.

    The course has two contact online session on Monday 2-4 pm and Wednesday from 12.15-14 pm.