Institut Nachhaltigkeit und Energie am Bau
Dauerhafte URI für die Sammlunghttps://irf.fhnw.ch/handle/11654/10
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Publikation Contributions to system integration of PV and PVT collectors with heat pumps in buildings(2019) Koch, Manuel; Dott, Ralf; Tanabe, Shin-ichi; Zhang, H.; Kurnitski, Jarek; Gameiro da Silva, Manuel; Nastase, Ilinca; Wargocki, Pawel; Cao, Guangyu; Mazzarela, Livio; Inard, ChristianA common approach to improve self-consumption of photovoltaic (PV) generation in buildings with heat pumps (HP) is to overload the thermal storage capacities during times with surplus PV generation (hereinafter referred to as thermal overloading). The impact of battery capacity and domestic hot water (DHW) consumption on the effectiveness of this method in a single-family home (SFH) is evaluated through numerical simulations. Increased battery capacity is shown to decrease the effectiveness of thermal overloading. Regarding DHW consumption, temporal concentration is shown to have a stronger influence on the effectiveness of thermal overloading than total energy. Furthermore, the potential of photovoltaic-thermal collectors (PVT) as heat exchangers for air/brine/water heat pumps (ABWHP) is estimated. The results show that the properties of PVT collectors with high thermal conductivity are in the feasible range for application in a well-insulated SFH in Central European climate.04B - Beitrag KonferenzschriftPublikation CoolShift. Cooling of buildings by chiller-assisted nocturnal radiation and convection(IOP Publishing, 2019) Koch, Manuel; Dott, Ralf; Eismann, RalphA novel approach for cooling an office building is numerically evaluated. PVT collectors are used for nocturnal radiative and convective cooling. A TABS ceiling serves as thermal storage. If the free cooling power of the PVT collectors is too low, it is boosted by a chiller raising the collector temperature. While the energy efficiency improves compared to a conventional daytime chiller cooling system, the room temperature cannot always be kept in the desired band. Furthermore, the PVT collectors stay cooler than comparable PV modules during the day, increasing the electricity generation.01A - Beitrag in wissenschaftlicher ZeitschriftPublikation CoolShift – Cooling of buildings by chiller-assisted nocturnal radiation and convection(IOP Publishing, 04.09.2019) Koch, Manuel; Dott, Ralf; Eismann, Ralph; Scartezzini, Jean-LouisA novel approach for cooling an office building is numerically evaluated. PVT collectors are used for nocturnal radiative and convective cooling. A TABS ceiling serves as thermal storage. If the free cooling power of the PVT collectors is too low, it is boosted by a chiller raising the collector temperature. While the energy efficiency improves compared to a conventional daytime chiller cooling system, the room temperature cannot always be kept in the desired band. Furthermore, the PVT collectors stay cooler than comparable PV modules during the day, increasing the electricity generation.04B - Beitrag KonferenzschriftPublikation IEA HPP Annex 28 - Uniform testing and performance calculation(2007) Afjei, Thomas; Dott, Ralf; Wemhöner, Carsten99 - SonstigesPublikation Standardsysteme zum energieeffizienten Heizen und Kuehlen (SEK)(2006) Wemhöner, Carsten; Afjei, Thomas; Dott, Ralf05 - Forschungs- oder ArbeitsberichtPublikation Heizen und Kuehlen mit erdgekoppelten Waermepumpen JB2006(2006) Dott, Ralf; Afjei, Thomas; Wemhöner, Carsten; Altorfer, Marc; Huber, Heinrich99 - SonstigesPublikation Generic System Solutions for heating and cooling of residential dwell(2008) Afjei, Thomas; Wemhöner, Carsten; Dott, Ralf99 - SonstigesPublikation Operating Agent IEA HPP Annex 32(2006) Wemhöner, Carsten; Afjei, Thomas; Dott, Ralf05 - Forschungs- oder ArbeitsberichtPublikation IEA HPP Annex 32 - Research for heat pump in low energy houses(2007) Afjei, Thomas; Dott, Ralf; Wemhöner, Carsten99 - Sonstiges