IDEA #1O85VS Thermoelectric Pyro-Geliometer For Measuring Solar Constant

THERMOELECTRIC PYRO(cid:2)(cid:2)GELIOMETER FOR MEASURING SOLAR CONSTANT APPLIED RESEARCH • SENSORSDescription Basic error of measurement over the range of 80(cid:2)2500 W/m2, % , + 0,1 Reproducibility of measurement results at the level of solar constant, % , + 0,04 Time constant, s , 1 Time of reading the indications up to 0,05 % of the amplitude value, s , (cid:2) 10 Dimensions of extermal case pyrheliometer (without places of fastening): (cid:2) diameter, mm ,120 (cid:2) heights ( without aperture pipe), mm ,110 (cid:2) heights ( with aperture pipe ), mm ,300 Total weight, kg , 2,8 Innovative Aspect and Main Advantages The highest measurement precision is attained due to: • Provision of the isothermal mode of cavity calorimetric receiving element and a system of aperture diaphragms by means of special thermoelectric heating/cooling systems; • Utilization of high(cid:2)precision multi(cid:2)element differential ther(cid:2) mopiles made of optimized semiconductor thermoelectric material. The thermopile provides constant conversion coeffi(cid:2) cient over the temperature range of (cid:2)40oC ~ +40oC; • Utilization of absolutely black body as a receiving collector of cavity model, with a special(cid:2)shaped mirror reflector mount(cid:2) ed inside the cavity at the point of initial incidence of solar radiation beam; • Provision during calibration of the equivalency of replace(cid:2) ment of solar radiation thermal effect with the electric calibra(cid:2) tor thermal effect; • Utilization of stable blackening coatings on the internal surface of receiving cavity with their reflection factor charac(cid:2) terized by predominantly mirror component; • Utilization in the creation of pyrheliometer of design princi(cid:2) ples successfully tested in the development of microcalorime(cid:2) ters with the resolution of 10(cid:2)8W. Areas ooff Application The pyrheliometer is intended for the absolute measurement of direct solar radiation with the highest precision. The pyrheliometer can be used for the measurement of solar constant both under terrestrial and space flight conditions (as part of meteorological satellites, space stations). The pyrheliometer can be used as a meteorological means to provide precise measurement of short(cid:2)wave and long(cid:2)wave solar spectrum parts, scattered solar radiation, etc. Stage ooff Development Prototype available for testing. License agreements and coop(cid:2) eration the further development are sought. Contact Details Organization: Institute of Thermoelectricity Contact person: Lavska Lyudmyla Address: General Post(cid:2)Office, Box 86, Chernivtsi, 58002, Ukraine Теl: (3803722) 7 58 60 Fax: (3803722) 41917 E(cid:2)mail: anatych@inst.cv.ua Website: www.ite.cv.ukrtel.net INNOVATIVETECHNOLOGY OPPORTUNITIES FROM THE STCU 61