Introduction:

This use-case explores the integration and feasibility of excess heat as a “by product” from H2 production to enhance the district heating system managed by Aalborg Forsyning (utility), Denmark. Secondly the case investigates how excess heat can be used for other purposes than only district heating.

Objective:

The primary objective of this case study is to maximize the efficiency of energy utilization by repurposing excess heat from the H2 (PtX) processes to meet the heating demands of the local community, contributing to both sustainability and cost-effectiveness. 

Mapping of Excess Heat Production:

To optimize the utilization of excess heat, a detailed mapping of its production is carried out. This involves analyzing daily, weekly, and seasonal variations in the H2 production and thereby the excess heat generation. Understanding these patterns allows for the development of strategies to efficiently store and distribute the excess heat as needed into the district heating network.

Techno-Economic Analysis:

A comprehensive techno-economic analysis is conducted to assess the feasibility and economic viability of the integrated system. This includes evaluating the initial investment costs, operational expenses, potential energy savings, and the overall economic impact on the community.

Seasonal Energy Storages:

To address the variability in excess heat production and ensure a reliable supply for district heating, seasonal energy storage solutions are investigated. These storage systems can include thermal storage facilities capable of holding the excess heat during periods of high production and releasing it during periods of increased demand.

Other Applications of excess heat 

As not all the excess heat can be used for District Heating purposes, the case also explores other potential applications and synergies for use of the heat. 

Expected Outcomes:

Energy Efficiency: The integration of excess heat into the district heating system is expected to significantly improve the overall energy efficiency of both the PtX facility and the Aalborg Forsyning district heating network.

Environmental Impact: By reducing the reliance on traditional heating sources, the initiative aims to decrease carbon emissions, contributing to the city’s broader sustainability goals.

Economic Benefits: The techno-economic analysis will provide insights into the financial benefits of repurposing excess heat, including potential cost savings.

Community Advantages: Residents of Aalborg can expect a more sustainable and cost-effective heating solution, showcasing the potential for H2-byproduct potential to positively impact local communities.

This case description serves as a blueprint for similar initiatives globally, emphasizing the importance of harnessing excess heat as a valuable resource in the pursuit of sustainable and efficient energy practices.