In the present work, a study has been conducted for the assessment of the comparative performance of different types of heat pump systems in a low energy building. The case study is a residential building complex in northern Italy (Milan) with 15 apartments distributed in 3 floors and total air-conditioned area is about 1050 m². The building is designed according to the advanced rules of sustainable architecture and satisfies all the requirements of the Italian National Standards implemented under Energy Performance Building Directive (EPBD). The energy performance of the building is carried out through dynamic simulations using EnergyPlus software. The estimated annual energy demand for the simulated building is 31.7 kWh/m2 for heating and 21.9 kWh/m2 for cooling. Two types of heat pump technologies are applied in that building for heating and cooling systems. The first one is an air-to-water heat pump (ASHP) using outside air as heat source/sink. The second one is a ground source heat pump (GSHP), uses geothermal energy as renewable energy source, through vertical ground heat exchanger (boreholes). The heat is distributed through the radiant floor panels inside the building. As a preliminary evaluation, the energy consumption results are compared between two systems in order to evaluate potential energy savings. The results are compared for both heating and cooling energy consumption. It has been observed that GSHP system has potential to provide annual energy savings of about 41% for heating and about 11% for cooling in comparison to an air-to-water heat pump.
Comparative Performance of Different Types of Heat Pump Technologies in a Low Energy Building
ASTE, NICCOLO';MARINI, DASHAMIR;ADHIKARI, RAJENDRA SINGH
2010-01-01
Abstract
In the present work, a study has been conducted for the assessment of the comparative performance of different types of heat pump systems in a low energy building. The case study is a residential building complex in northern Italy (Milan) with 15 apartments distributed in 3 floors and total air-conditioned area is about 1050 m². The building is designed according to the advanced rules of sustainable architecture and satisfies all the requirements of the Italian National Standards implemented under Energy Performance Building Directive (EPBD). The energy performance of the building is carried out through dynamic simulations using EnergyPlus software. The estimated annual energy demand for the simulated building is 31.7 kWh/m2 for heating and 21.9 kWh/m2 for cooling. Two types of heat pump technologies are applied in that building for heating and cooling systems. The first one is an air-to-water heat pump (ASHP) using outside air as heat source/sink. The second one is a ground source heat pump (GSHP), uses geothermal energy as renewable energy source, through vertical ground heat exchanger (boreholes). The heat is distributed through the radiant floor panels inside the building. As a preliminary evaluation, the energy consumption results are compared between two systems in order to evaluate potential energy savings. The results are compared for both heating and cooling energy consumption. It has been observed that GSHP system has potential to provide annual energy savings of about 41% for heating and about 11% for cooling in comparison to an air-to-water heat pump.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
