The planned energy retrofitting of a residential building in Bologna, North-Center Italy is presented. The building is a detached house with an unheated basement, three floors with 2 apartments each, and an unheated attic. The total heated floor area is 281.9 m2. The external wall is made of solid bricks and most windows are single glazed; no thermal insulation is present. Space heating is supplied by means of a gas boiler and radiators in the rooms. DHW is supplied by single-apartment electric boilers in 5 apartments and by a gas boiler in one apartment. Lighting is obtained by incandescent lamps. The proposed retrofitting includes: external thermal insulation of the vertical walls by calcium silicate hydrates and loft insulation by mineral wool; replacement of windows; installation of a multifunction air-to-water heat pump for heating, cooling and DHW; replacement of the radiators by new heat exchangers; LED lighting; installation of PV panels. The building has been simulated by TRNSYS 17, and the heat pump has been simulated by a own MATLAB code. The retrofitting will reduce the total annual use of primary energy (excluding appliances) from 377.9 to 44.8 kWh/m2, and will provide also summer cooling and dehumidifying, now not available.

Planning the energy retrofitting of a residential building in Bologna, Italy

LAZZARI, STEFANO;
2014-01-01

Abstract

The planned energy retrofitting of a residential building in Bologna, North-Center Italy is presented. The building is a detached house with an unheated basement, three floors with 2 apartments each, and an unheated attic. The total heated floor area is 281.9 m2. The external wall is made of solid bricks and most windows are single glazed; no thermal insulation is present. Space heating is supplied by means of a gas boiler and radiators in the rooms. DHW is supplied by single-apartment electric boilers in 5 apartments and by a gas boiler in one apartment. Lighting is obtained by incandescent lamps. The proposed retrofitting includes: external thermal insulation of the vertical walls by calcium silicate hydrates and loft insulation by mineral wool; replacement of windows; installation of a multifunction air-to-water heat pump for heating, cooling and DHW; replacement of the radiators by new heat exchangers; LED lighting; installation of PV panels. The building has been simulated by TRNSYS 17, and the heat pump has been simulated by a own MATLAB code. The retrofitting will reduce the total annual use of primary energy (excluding appliances) from 377.9 to 44.8 kWh/m2, and will provide also summer cooling and dehumidifying, now not available.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11567/812197
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