IEA Solar Heating and Cooling Programm - NachhaltigWirtschaften.at
IEA Solar Heating and Cooling Programm - NachhaltigWirtschaften.at IEA Solar Heating and Cooling Programm - NachhaltigWirtschaften.at
IEA SHC Task 38 Solar Air Conditioning and Refrigeration Subtask A Report A-D3b, Date: December 2010 2.6 France: Résidence du Lac, Maclas Description of the application The targeted building welcoming the solar cooling application is the Résidence du Lac, a building dedicated to retired people. This building is located in the small town of Maclas in the Rhône Alpes area, close to Lyon. The town is in altitude, nearly 450 m high. The building was created in the seventies and has an average quality of energy efficiency. Only one small part of the building is cooled, the leisure space/restaurant which is compulsory since summer 2003 in retired buildings. This area is of 210 m² and includes a veranda oriented in the Southern direction. Efforts were made to increase the solar protection level in the veranda by adding dark thin protection films. Till 2007, the building owner used electric compression chillers (3 monosplits). Two of them were out of order in 2007 and the management took the decision helped by the SIEL (Syndicat Intercommunal d’Energie de la Loire), to go for a solar cooling system. The owner of the system is the SIEL itself. Type of building Retired people residence Location Maclas, France In operation since 2007 System operated by SIEL Air-conditioned area 210 m 2 System used for space heating? Yes System used for DHW preparation? No General description of the system The system is based on an absorption chiller of 10 kW coupled with evacuated tube collectors. The system works as a quasi solar autonomous cooling system because only a small electric compression chiller (split type) is used in case of failure of the solar system. The load of a part of the building is based on the following scenario: cooling demand from June to mid September and heating demand from mid October to end of May. The solar system uses fan coils for the cooling and heating modes. In addition, thanks to buffer storage, the energy is valorized in the heating mode through the central heating network of the Résidence du Lac. The heat rejection system is done by a drycooler located in the northern facade of the building. Central air-conditioning unit Technology Nominal capacity Type of closed system Brand of chiller unit Chilled water application Dehumidification Heat rejection system closed cycle 10 kW cold Absorption Sonnenklima Fan coils no dry page 22
IEA SHC Task 38 Solar Air Conditioning and Refrigeration Subtask A Report A-D3b, Date: December 2010 Solar thermal Collector type Evacuated tube Brand of collector Thermomax Mazdon 20 Collector area 24 m 2 absorber Tilt angle, orientation 30°, 15° west Collector fluid water-glycol Typical operation temperature 75 °C driving temperature for chiller operation Configuration Heat storage 0.5 m 3 water Cold storage Buffer water (80 liters) Auxiliary heater none Use of auxiliary heating system - Auxiliary chiller yes - type el. Compression chiller - capacity 3 kW cold System scheme System performance For one cooling season monitored in summer, an average thermal coefficient of performance of COPth = 0.54 was observed while the collector yield is about 40%. And the electrical coefficient of performance for the same period is about COPel = 2.5. Focusing on a day with especially good climatic conditions, the COPth can reach 0.63, and the COPel reached 3.08. System reliability and overall success of the installation The main issue for the Maclas installation was actually an “administrative” one. Indeed, the data transfers were a bit chaotic since they were transferred first by the chiller manufacturer, and then sent to the institution in charge of the monitoring. And because of the solvability situation of the chiller manufacturer, it was not possible to access the data to calculate performances or to check if the installation is working properly. However, this partial monitoring led to several conclusions. The strengths of the installation were: the ability to cool down the building from 12pm to 18pm (when it was needed), the compatibility with a dry page 23
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<strong>IEA</strong> SHC Task 38 <strong>Solar</strong> Air Conditioning <strong>and</strong> Refriger<strong>at</strong>ion Subtask A Report A-D3b, D<strong>at</strong>e: December 2010<br />
2.6 France: Résidence du Lac, Maclas<br />
Description of the applic<strong>at</strong>ion<br />
The targeted building welcoming the solar cooling applic<strong>at</strong>ion is the Résidence du Lac, a<br />
building dedic<strong>at</strong>ed to retired people. This building is loc<strong>at</strong>ed in the small town of Maclas in<br />
the Rhône Alpes area, close to Lyon. The town is in altitude, nearly 450 m high.<br />
The building was cre<strong>at</strong>ed in the seventies <strong>and</strong> has an average quality of energy efficiency.<br />
Only one small part of the building is cooled, the leisure space/restaurant which is<br />
compulsory since summer 2003 in retired buildings. This area is of 210 m² <strong>and</strong> includes a<br />
ver<strong>and</strong>a oriented in the Southern direction. Efforts were made to increase the solar<br />
protection level in the ver<strong>and</strong>a by adding dark thin protection films. Till 2007, the building<br />
owner used electric compression chillers (3 monosplits). Two of them were out of order in<br />
2007 <strong>and</strong> the management took the decision helped by the SIEL (Syndic<strong>at</strong> Intercommunal<br />
d’Energie de la Loire), to go for a solar cooling system. The owner of the system is the SIEL<br />
itself.<br />
Type of building Retired people residence<br />
Loc<strong>at</strong>ion Maclas, France<br />
In oper<strong>at</strong>ion since 2007<br />
System oper<strong>at</strong>ed by SIEL<br />
Air-conditioned area 210 m 2<br />
System used for space he<strong>at</strong>ing? Yes<br />
System used for DHW prepar<strong>at</strong>ion? No<br />
General description of the system<br />
The system is based on an absorption chiller of 10 kW coupled with evacu<strong>at</strong>ed tube<br />
collectors. The system works as a quasi solar autonomous cooling system because only a<br />
small electric compression chiller (split type) is used in case of failure of the solar system.<br />
The load of a part of the building is based on the following scenario: cooling dem<strong>and</strong> from<br />
June to mid September <strong>and</strong> he<strong>at</strong>ing dem<strong>and</strong> from mid October to end of May. The solar<br />
system uses fan coils for the cooling <strong>and</strong> he<strong>at</strong>ing modes. In addition, thanks to buffer<br />
storage, the energy is valorized in the he<strong>at</strong>ing mode through the central he<strong>at</strong>ing network of<br />
the Résidence du Lac. The he<strong>at</strong> rejection system is done by a drycooler loc<strong>at</strong>ed in the<br />
northern facade of the building.<br />
Central air-conditioning unit<br />
Technology<br />
Nominal capacity<br />
Type of closed system<br />
Br<strong>and</strong> of chiller unit<br />
Chilled w<strong>at</strong>er applic<strong>at</strong>ion<br />
Dehumidific<strong>at</strong>ion<br />
He<strong>at</strong> rejection system<br />
closed cycle<br />
10 kW cold<br />
Absorption<br />
Sonnenklima<br />
Fan coils<br />
no<br />
dry<br />
page 22
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