Abstract
The pilot plant at the sport palace Palacus in Genoa is heated by a solar assisted heat pump, interfaced with a solar hybrid field and two integration gas burners. The heating system has been operating since 2012/13 and its performances have been collected almost continuously by means of a dedicated data acquisition system. The information and the experience acquired have been applied to the design of the revamping of the system, also considering the legislative changes occurred in Italy in the past decade, especially about photovoltaic production. The here presented case study allows the definition of some general design strategies to be implemented during the development of a new SAHP plant or when a revamping is required.
Highlights
Solar Assisted Heat Pumps (SAHPs) belong to the family of technologies exploiting different renewable sources coupled together to obtain higher performances
The solar assisted heat pumps represent a high potential technology where the renewable sources are coupled to a heat pump to reach very efficient results
The use of heat pumps shifts the consumption from fossil fuels to electricity and the coupling with either a PV or a hybrid solar field represents one of the most relevant chances to reach a stand-alone installations with on-site consumption. This goal would avoid or at least reduce potentially critical situations on the national grid which has not been designed to cover the massive use of heat pumps
Summary
Solar Assisted Heat Pumps (SAHPs) belong to the family of technologies exploiting different renewable sources coupled together to obtain higher performances. The plant design dates back to the 2013 (before the Minimum requirements decree) and the key concept of the project is based on the use of the summer production to cover the electric needs of the HP during the heating season According to this principle, the installed capturing surface would cover the HP electric consumptions with a surplus of about 40% delivered to the grid. According to the current net metering criterion (monthly energy balance instead of a yearly one) the same installation would loses its convenience since only about 40% of the total need of the HP is covered by the solar hybrid field, as shown in [3] This dramatic change depends on the electricity produced and lost during summer since the heating plant is inactive. The interest in this issue has a general validity since it could be applied to any solar field either existing or under design
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