La Presidenta del Consejo Social de la Universidad de Almer
Deadline 13/09/2016-27/09/2016. National Sub-Programme for T
The fourth and last SFERA 2 access campaign has already been
Solar-assisted air-conditioning and heating system
All active systems in the CIESOL building have been applied with the objective of providing the same comfort level as expected from conventional air-conditioning systems. The solar-assisted air-conditioning system installed in the CIESOL building meets its cooling demand for five months of the year (from May to September) as well as its heating load from November to March. It always provides comfortable indoor conditions of around 25°C and 22°C during the cooling and heating periods, respectively. Since no air-conditioning is generally required in October or April, the maintenance operations are usually carried out at these times. This system also serves as a test stand for various scientific research projects being carried out by different CIESOL R&D units.
Figure illustrates the general scheme and the measurement sensors of the solar-assisted air-conditioning and heating system.
Photovoltaic electricity production system
The CIESOL building has a photovoltaic electricity production system (PV) installed on its roof. The photovoltaic installation has a 9.324 kWp capacity and it has been in operation since 2009. It consists mainly of the photovoltaic modules, inverters and other electrical equipment. The photovoltaic modules used are manufactured by the Spanish company Atersa. The model used is the A-222P, with 60 polycrystalline cells and a power capacity of 222 Wp – there are 42 modules in total, arranged in 3 series strings of 14 modules each. The final DC/AC conversion of the electricity produced is carried out by means of three CICLO-3000 inverters. The inverters are plugged into the national grid due to obligatory legislation for the utilization of renewable energy sources in Spain. The PV system is mounted on a stainless steel support structure facing south and titled at 22˚ - an angle chosen to maximise yearly energy production. Additionally, the performance of the PV system is monitored by data-acquisition system. Currently about 90 diverse variables are gathered with 1 minute sampling period..
Schematic diagram of the photovoltaic system.
Since 2007, CIESOL has been equipped with meteo station installed on the roof of the building. The below figures present diverse sensors installed in the aforementioned meteo station, namely sun trucker (2AP Kipp&Zonen) with global, direct and diffused radiation’s sensors. Additionally, ambient temperature sensor, wind velocity and direction, humidity and CO2 sensors were applied. Since 2008, Yankee sky camera and image reception system from the Meteosat Second Generation satellite have been installed.
CIESOL monitoring system
Today, the performance of CIESOL building is monitored and controled by National Instruments control and data-acquisition system developed during ARFRISOL project. Currently about 317 diverse variables are gathered with 1 minute sampling and collected data are transmitted to PC for storage and further processing. It allows an easy change of parameters and functions, enabling incorporation of new sensors and to study the effects of control performance. This system in completely automatic form manages all key monitoring variables. The below figures present the final distribution of the Compact Fieldpoints used in the ground floor of the CIESOL building and an example of one monitored laboratory.
During 2015 and thanks to a scientific infrastructure project entitled "multipurpose pilot assessment optimization and improvement of agrifood systems with renewable energy refrigerated Module" (UNAM13-1E-2532), a pilot module was installed in the CIESOL courtyard. It is composed of three complementary core modules, a common control and supervision room where there is an expert data acquisition system, with monitoring and flexible remote control as a management tool. The aforementioned facilities can be described as follows:
CIESOL Courtyard with the three refrigerated cameras and the control room
Hybrid system consisting of a wind turbine (left) and PV system, installed opposite the main entrance of the CIESOL building and its courtyard respectively (right), forming an integral part of UNAM13-1E-2532 project.