MEDESOL project
Owing to its features, membrane distillation process is believed to have a great potential to be employed for the production of high-purity water from seawater, brackish water and industrial wastewater …
The Virtual Prototype of the Tracking System
The literature presents some constructive solutions of tracking mechanisms [6-10], but a general approaching for the conceptual design and the structural synthesis of these mechanisms is missing. Thus rises the …
Trough placement for sun tracking
The advantage of one-axis tracking concentrators is to require tracking the sun only in one direction, because in the other direction these collectors do not perform sunlight concentration. The axis …
Outlook / Operation
It is planned to start installation of the receiver-reactor at the SSPS tower of Plataforma Solar de Almeria in 2008. Initial solar testing is scheduled to the end of 2008 …
Previous Studies
Two previous studies have been undertaken investigating ISAHP systems. The first study involved developing a model in TRNSYS [12], a transient simulation program, to investigate the feasibility of the system, …
Energy Performance and Optimisation
Tmopt program was used to couple the Tmsys simulations software with GenOpt, a generic optimisation program. Trnopt acts as an interface programme between the two software programs and streamlines the …
Scope of the work
The Solar Turbine Group (STG) was founded for the purpose of developing and implementing a small scale solar thermal technology utilizing medium temperature collectors and an ORC to achieve economics …
Modelling in TRNSYS
The modelling of the systems in TRNSYS is based on the system models and boundary conditions used in IEA-SHC Task 26 Solar Combisystems [2], which includes both the building (single …
Experimental set-up
The system has two independent loops, the solar loop that supplies the thermal energy to the desalination unit and operates with osmosed water in order to protect solar collectors from …
Optimizing the Tracking System
The main task in optimizing the active component (the tracked solar collector) is to maximize the energetic gain by increasing the solar input and minimizing the energy consumption for tracking. …
Sun’s altitude and ray incidence
The sun’s altitude over the horizon depends on Latitude and it varies during the year and during the day. Figure 3 gives an example of sun’s altitude considering the Latitude …
Test of a Mini-Mirror Array for Solar Concentrating Systems
J. Gottsche1, B. Hoffschmidt1, S. Schmitz1, M. Sauerborn1*, Ch. Rebholz2, D. Ifland2, K. Badstubner2, R. Buck3 and E. Teufel3 1 Solar-Institute Julich (SIJ), Aachen University of Applied Sciences (AcUAS), D-52428 …
Experimental Investigation
The preliminary experimental evaluation involved building and instrumenting an ISAHP system in a laboratory setting, based on the recommendations of component sizing given by Freeman [4]. The solar collector in …
Relationship Research of Heliostat Field Boundary Line. and Receiver Depression Angle
Deyou LIU*, Su GUO, Dingsheng WAN, Feng WANG1 'Department of Power Engineering, Hohai University, Nanjing 210098, Jiangsu Province, China* Corresponding Author, liudyhhuc@163.com Abstract In this paper, based on the geometrical …
Scroll expander model
The scroll expander model has been previously proposed by Lemort et al. [5] and partly validated by tests with steam. In this model, the evolution of the fluid through the …
. Discussion and Conclusions
Figure 2 and 3 show that the amount of emitted CO varies significantly for the different systems. There are several reasons for these differences. Each pellet heater has its own …
The AGMD modules
The AGMD system consists of three commercial rectangular modules (i. e., Scarab development AB, Sweden) with twenty membranes each (2.3 m2 membrane per module).The membranes are fixed to polypropylene cassettes, …
Pilot Plant for Solar Process Steam Supply
K. Hennecke,1* T. Hirsch2, D. Krtiger1, A. Lokurlu3 and M. Walder4 1 DLR - German Aerospace Center, Linder Hohe, 51147 Koln, Germany2 DLR - German Aerospace Center, Pfaffenwaldring 38-40, 70569 …
Error in trough placement
Referring to the N-S positioning, the horizontal axis of parabolic trough (X in Fig. 1) should be oriented in the North-South direction, which corresponds to the axis of Earth rotation. …
Design of the developed Mini-Mirror Array (MMA)
In a still running project such an alternative heliostat design was developed in cooperation between SIJ, IZM and DLR. The resulted design (fig. 3) of a longer development time consists, …
Current Study
The current study is an extension to the previous experimental study, however, the objective of the current study is to determine how the heat pump unit responds to a wide …
Determination of Field Boundary Line
Solar rays reflected by heliostats at any location in the heliostat field should totally go into the receiver aperture. Therefore, the field boundary line should be determined by the condition …
Condenser and evaporator models
The condenser and the evaporator are modeled by means of the є-NTU method for counter-flow heat exchangers. The heat exchanger is subdivided into 3 zones, each of them being characterized …
Innovative Fixed Mirror Solar Concentrator for Process Heat
V. Martinez1*, R. Pujol1 and A. Moia1 1 UIB, Phisics Department, Campus UIB, Ctra de Valldemossa km 7.5, 1070122 Palma de Mallorca, Spain * Corresponding Author, victor. martinez@uib. es Abstract …
Results of the AGMD experimental testing
Experiments were divided into two stages, in the first one we used 1 g/l marine salted water (15002000 pS/cm) in the feed hot channel and deionised water as coolant. In …
Industrial process
The industrial steam system at the ALANOD is based on a gas fired steam boiler, a condensate tank and a feed water tank with chemical conditioning. For an average production …
Recovering procedure
The effects of an incorrect placement of trough axis, in particular considering the North-South positioning, have been discussed in the previous sections. Referring to the solar trough with parabolic mirror …
Test facility: artificial sun
The exceptional artificial sun (fig. 6) of the SIJ is an indoor placed sun simulator which can simulate the sun’s position according to the altitude angle and the azimuth angle …
Experimental Apparatus
A schematic diagram is shown in Figure 2, depicting the main components of the ISAHP test rig. Table 1 lists the instrumentation and monitoring equipment used in the experiment, whose …
Estimation of Receiver Depression Angle
As the longitude has a minor influence on heliostat annual average efficiency, the influence of latitude is only discussed in this paper. Fig.3 is the scattergram of heliostat annual average …
Condenser and evaporator models
The condenser and the evaporator are modeled by means of the є-NTU method for counter-flow heat exchangers. The heat exchanger is subdivided into 3 zones, each of them being characterized …
Geometry optimisation
The starting point for the design of the concentrator geometry was the concept of the Fixed Mirror Solar Concentrator (FMSC) that is illustrated in Figure 1. Although the first development …
Results of the AGMD experimental testing
Experiments were divided into two stages, in the first one we used 1 g/l marine salted water (15002000 pS/cm) in the feed hot channel and deionised water as coolant. In …
Collector technology
The SOLITEM PTC 1800 collector will be used in the pilot installation. This parabolic trough collector system is assembled from modules with an aperture width of 1,8 m and a …
Energy Efficiency and solar process heat for industry. 10 Austrian case studies
Christoph Brunner1, Hans Schnitzer1,2, Bettina Slawitsch1, Werner WeiB3 1JOANNEUM RESEARCH Forschungsgesellschaft mbH - Institute of Sustainable Techniques and Systems Elisabethstrasse 16, A-8010 GrazTel.: +43-316 / 876 2413, Fax: +43-316 / …
