  In response to the European Commission's aim of cutting carbon emissions by
2050, there is a growing need for cutting-edge solutions to promote low-carbon
energy consumption in public infrastructures. This paper introduces a Proof of
Concept (PoC) that integrates the transparency and immutability of blockchain
and the Internet of Things (IoT) to enhance energy efficiency in tangible
government-held public assets, focusing on curbing carbon emissions. Our system
design utilizes a forecasting and optimization framework, inscribing the
scheduled operations of heat pumps on a public sector blockchain. Registering
usage metrics on the blockchain facilitates the verification of energy
conservation, allows transparency in public energy consumption, and augments
public awareness of energy usage patterns. The system fine-tunes the operations
of electric heat pumps, prioritizing their use during low-carbon emission
periods in power systems occurring during high renewable energy generations.
Adaptive temperature configuration and schedules enable energy management in
public venues, but blockchains' processing power and latency may represent
bottlenecks setting scalability limits. However, the proof-of-concept weakness
and other barriers are surpassed by the public sector blockchain advantages,
leading to future research and tech innovations to fully exploit the synergies
of blockchain and IoT in harnessing sustainable, low-carbon energy in the
public domain.
