Technical feasibility of heating systems for two school districts in the town of Matera

The present work is focused on technical feasibility of heating system design of two School District situated in the town of Matera. This paper analyses three different heating system highlighting for each of them advantages and disadvantages respect energy covered and environmental impact. To design heating system we conducted a previous energy audit in dynamic conditions on School District. This previous step is necessary to define energy demand and the best strategies to improve energy efficiency of these structures. Before to design heating system, we applied some envelope improvement on numerical model built with Design Builder software. In Fact, the school building which took part in School District has a high heat loss surface because they were built before the first Italian Law on energy efficiency. The heating system typologies considered in this study are: high temperature absorption heat pump integrated with a solar thermal system, high temperature electrical heat pump and cogeneration system. The first heating system typology has a great advantage in terms of primary energy because the conversion factor from natural gas to primary energy is equal to 1.05. The second one, high temperature electrical heat pump, has a great energy efficiency respect to the first one (2.50 vs 1.65) but, in term of primary energy, this system is not so convenient. In fact, the conversion factor from electricity to primary energy is equal to 1.95. The third one, cogeneration system, has the advantages to cover not only heating request but also electric request of school district.