Testing of Passive Solar Components Using Identification Methods

AN OUTDOOR TEST PROCEDURE FOR PASSIVE SOLAR COMPONENTS USING SHORT TERM MONITORING DATA FROM TEST CELLS IS PRESENTED. THE TEST CELL IS FIRST CALIBRA- TED WITH A HIGHLY INSULATED SOUTH WALL. DIFFERENT SOUTH WALL COMPONENTS ARE THEN INSERTED IMPLACE OF THE CALIBRATION WALL. THE AUXILIARY HEATING IS CON- TROLLED BY A PSEUDO RANDOM BINARY SEQUENCE WHICH MAKES IT POSSIBLE TO IDENTIFY AN ENERGY BALANCE MODEL WITH SHORT TERM MEASUREMENTS. DIFFERENT ENERGY BALANCE MODELS AND IDENTIFICATION METHODS ARE DISCUSSED AND TESTED WITH MEASUREMENTS FROM TWO TEST CELLS. MEASUREMENT PERIODS OF 10 TO 15 DAYS GIVE SATISFACTORY RESULTS, PROVIDED THERE IS SUFFICIENT VARIATION IN THE SOLAR RADIATION. SHORTERPERIODS DOWN TO ONE DAY, CAN BE USED IF NO TRENDS EXIST IN THE CLIMATIC VARIA- BLES. TIME DOMAIN IDENTIFICATION USING THE PREDICTION ERROR METHOD HAS BEEN USED. A FREQUENCY DOMAIN SOLUTION HAS ALSO BEEN OBTAINED USING A FINITE FOURIERTRANSFORM AND A SUBSEQUENT MINIMIZATION IN THE LEAST SQUARES SENSE. BOTH RE- SULTS ARE COMPATIBLE. THERE IS A SYSTEMATIC DIFFERENCE BETWEEN THE MORE SOPHI- STICATED 7-PARAMETER MODEL ( 2-CAPACITANCE) AND THE 4-PARAMETER MODEL ( 1-CAPA- CITANCE). THE RESULTS FROM THE 7-PARAMETER MODEL AGREE BEST WITH THE CALCULA- TED PARAMETER VALUES AND SOMETIMES GIVE A CONSIDERABLE IMPROVEMENT IN THE DESCRIPTION OF THE MEASURED DATA

VAN HATTEM Noel;  COLOMBO Roberto; 

1995-03-15

European Commission

JRC4968

EUR 11056 EN,   

https://publications.jrc.ec.europa.eu/repository/handle/JRC4968,