Open Dynamic System

for Holistic energy Management of the dynamics of energy supply, demand and storage in urban areas

Rome XI Pilot case

Description of the neighbourhood

The Municipality of Rome XI is a district of Roma Capitale located in the south - east of the historical city center of Rome, it is made up of nine neighborhoods, has an area of 47,292 square kilometers and a population of about 135,000 inhabitants.

Roma-1a.jpg

Figure. Rome Municipio XI

The public buildings used as reference in the pilot case of the Municipality of Rome XI are seven and are spread over three neighborhoods.

  • Garbatella
  • Montagnola
  • San Paolo

Figure. Rome Municipio XI neighborhoods

 

Read more: Rome XI Pilot case

Manchester City Pilot case

Description of the neighbourhood

The Manchester Town Hall Extension (THX) is an important facility for the city’s administration. It is a narrow plan steel and concrete framed building 8 floors completed in 1938. It has undergone a major refurbishment during the period 2011-13 to bring it up to a modern office standard and is now being gradually re-occupied. As a heritage building the options for the improvement to the thermal performance of the fabric are limited, (the building is grade II listed 1clad in sandstone with steep pitched lead roof). The appearance of the exterior and much of the interior had to be maintained which, with the narrow frame section of the windows precluded application of internal or external insulation. Instead, to address the CO2 abatement target, the design strategy has been to focus on increasing the efficiency of the new heating and cooling systems and in their control.

The THX is part of the Manchester Town Hall Complex (THC) which has been equipped with a “bespoke” heating and cooling system. This consists of a gas boiler installation to supply the main heating load as well as a CHP installation for electrical supply. Waste heat from the CHP is utilised efficiently controlled by the Building Energy Management System (BEMs) as explained below. Two 358 kWh CHP engines supply all the electricity needs of THC – 1MVa load. During heating periods (daytime) waste heat from CHP engines (330kW) feed into + preheat three 1062kW gas boilers for main LTHW system. Three 500l LTHW buffer vessels on HW supply to floor zones via ultrasonic heat meters. Radiators with TRV are mounted under windows in each floor zone. Connected heating load = 3MW. Main office floors are naturally ventilated and this supports summer cooling (narrow plan floor plate). Overnight unused/waste heat from CHP is used to feed one 200kw absorption chiller which charges a chiller store of seven 7000l chilled water storage vessels which supports base cooling load for most of the year (ICT area + some conference facilities). One 486Kw electric chiller supports additional peak summer cooling load - max 600kW. A heat exchanger controls waste heat flow from CHP units to boilers (330kw max) and absorption chiller (230Kw max). In low occupancy periods e.g. overnight one of the two CHP units shuts down (50% turndown ratio).

The use cases will look at the energy use of the whole building as well as the staff occupants/users of office floor zones along with technical measures to manage internal lighting.

Read more: Manchester City Pilot case