In February 2020 the very first report on the results of the integrated innovations in A2A network is finally available. TEMPO project is fully operative and it’s time to take stock of the implementation status of the solution packages.
The document illustrates how the TEMPO innovations are implemented in the A2A demonstrator as well as the preliminary work for the site preparation, the main technical and economic aspects of the implementation, the reasons for discrepancies from the original time schedule and the adopted countermeasures, the quality control of the implementation, the commissioning of the demo site and initial operation.
The most important preliminary activity was the customer engagement. Starting from the beginning of 2019, A2A has approached the customers of the multi-family house through the building manager and the single-family house through their respective dwellers. In June 2019, a public assembly was organized for customers to describe the project and to collect acceptances for installing the indoor temperature sensors. The number of customers accepting to receive the sensors was higher than expected.
The site preparation comprehended the laying of new pipes to hydraulically decouple the main DH network from the demo site and the installation of a supply/return mixing station. These activities have the purpose to enable the demo site to decrease the operating temperatures without affecting the rest of the network and to host the TEMPO innovations.
In overall, considering the administrative time, two years resulted necessary to prepare the site. In economic terms, almost 2600 person-hours of A2A personnel were used and the material costs for authorization, design, transport, construction of mixing station and subnetwork, performance tests, instrumentation resulted about 170 k€.
The authorization process for the construction of the mixing station took longer than expected. The mixing station could then be installed in October 2018. After a monitoring period ad high temperature, in January 2020 the supply temperature of the site was progressively lowered from the value of the main network (110÷120 °C) to 90 °C. Additionally, monitoring equipment developed by NODA to transmit data on the smart platform was installed and calibrated. In a second phase (February-March 2020), the local control of the mixing station was tested and optimized to improve the operational stability.
During the quality control, following main issues were detected:
• Noise of the pump at the low-temperature-side of the mixing station: verifying that the pump noise is within the legal limit was a necessary and critical step in consideration of the mixing station being in close proximity to the multi-family house. The check was performed successfully in January 2020.
• The continuous collection of monitoring data started working properly just on the beginning of December 23rd, 2019. For this reason, the monitoring of the high-temperature operation covers a very limited period and it must be repeated for a small part of the next heating season to get consistent data.
The next planned activity is the implementation of the smart remote control at the mixing station and at the substation of the MFH to target a further lowering of the network temperatures (expected in the heating season 2020-2021).
For more insights you can freely download the report here