1. Subject number: 5
PROTEAS: a hybrid device for the production of electricity, heat and cooling
power
A. Papadopoulos1, K. Chrysagis1, S. Karvelas1, D. Dousis1, J. Lutz2, Y. Spanoudakis3,
Y. Aspiotis3, I. Luque-Heredia4, J. M. Moreno4, P. H. Magalhaes4 V. Emm.
Vamvakas5, M. Mathioulakis6 and D. Davazoglou5*
1
Zenon S. A., Kanari 5, 15354 Glyka Nera, Attiki, Greece, Tel: (30-210) 6041582,
Fax: (30-210) 6041051, e-mails: alpapher@otenet.gr, chrysagis@zenon.gr,
karvelas@zenon.gr, dousis@zenon.gr.
2
BEST Wiesenstr. 5, 64625 Bensheim, Germany, Tel: 0049-6251-801-200 Fax:
0049-6251-801-180, e-mail: m.lutz@gbunet.de
3
MILTECH HELLAS S. A. POB 101, Metaxa Str, 19002, Peania, Greece, Tel:
+3010-6647320, Fax: +3010-6647322, e-mail: j.spanoudakis@miltech.gr
4
INSPIRA S.L., C/Chile, 10, Edf. "Madrid-92" Of. 16-17, 28230, Las Rozas de
Madrid, Spain, Tel: (34-91)6304534, Fax: (34-91) 6304087, e-mails:
iluque@inspira.es, jmmoreno@inspira.es, phmagalhaes@inspira.es
5
NCSR “Demokritos”, Institute of Microelectronics, POB 60228, 15310 Agia
Paraskevi, Attiki, Greece, Tel: +30 210 6503117, Fax: +30 210 6511723, e-mails:
bil@imel.demokritos.gr, d.davazoglou@imel.demokritos.gr
6
NCSR “Demokritos”, Institute of Nuclear Technology and Radiation Protection,
POB 60228, 15310 Agia Paraskevi, Attiki, Greece, Tel: +30 210 6503817, Fax: +30
210 6511723, e-mail: math@ipta.demokritos.gr
* Corresponding author
The purpose of this work is the development of a hybrid device, hereafter named
PROTEAS, able to produce electricity, heat in the form of hot hater and cooling
power. PROTEAS in series production is expected to have a low cost. The approach
consists in producing electricity with concentration (X100) Si solar cells.
Concentrators are formed using innovative optics among other comprising mirrors
made of (transparent) glass based on total reflection (see Fig. 1), as opposed to
conventional silvered mirrors. The use of glass renders the lifetime of these mirrors
practically infinite, thus contributing to the cost decrease of the energy produced. The
water from the cooling of cells will be used either directly for household purposes
during winter or for the production of cooling power during summer. Cooling power
is produced with an innovative low power (15 KW) adsorption heat pump able to
operate with water of temperature around 70 oC. Important innovations are also
needed to face with problems such as the encapsulation of concentration cells, the
sun-tracking and the management of the produced energy. The results reported refer
to the engineering of the system and the construction so far (see Fig. 2). Innovations
related to optics, encapsulation of cells, light trapping, metallic construction, power
electronics, sun-tracking, etc are presented. The main conclusions of the work so far
are that PROTEAS, in mass production, may be constructed at a relatively low price
and that this device has the potential to convert large amounts of the incident (the
modeling predicts near 70%) to useful energy.

2. Fig. 1. A mirror based on total reflection (left), burning a piece of plastic with such a
mirror (right).
Fig. 2. Views of the prototype of PROTEAS.