parabolic solar ppt

8/18/2019 Parabolic Solar PPT

http://slidepdf.com/reader/full/parabolic-solar-ppt 1/33

Design, Test

and Mathematical Modelingof Parabolic Trough Solar Collectors



Contents

Introduction

Design and manufacture of prototypes

PTC testing

Mathematical model of a PTC

Annual simulation of performances



Introduction

electric energy55% thermal energy5%

!"5

data based on Italian energy consumption #source$ Ministero Siluppo &conom



Introductionindustrial

(!%

residential)*%

!"5

data based on Italian energy consumption#source$ Ministero Siluppo &conomico'



Introduction

!++-++.C / 0tep

#Italy'

!"5

data based on Italian energy consumption #source$ Ministero Siluppo &conom



Univpm.01: design concept

Design and Manufacture of Prototypes -"5



Univpm.01 &PS1berglass sand2ich /

allinone reali3ation of the frameand the parabolic shape

hand layup molding method




Design and Manufacture of Prototypes




-"5




Univpm.01

4ocal distance #F '

parabolic trough main

characteristics

m

im angle #Φr ' rad

Parabola length #Lc' m

Aperture area # Aap' m-

Sand2ich thic6ness #t ' m

+7-5

8"-

-7!+

!795

+7+5

-"5



focal distance #F '


characteristicsm

rim angle #Φr ' rad

parabola length #Lc' m

aperture area # Aap' m-

sand2ich thic6ness #t ' m

+755+

8"-

-75-5

57::+

+7+5

inner Al diameter #dri'

receiver characteristics

mm

outer Al diameter #dre' mm

inner glass diameter #dvi' mm

outer glass diameters #dve' mm

receier surface # Are' m-

-5

)+

(

9

+7-*

C/Aap"Are/-)7!:

concentration ratio


Univpm.02

-"5



Univpm.02

focal distance #F '


characteristicsm

rim angle #Φr ' rad

parabola length #Lc' m

aperture area # Aap' m-

sand2ich thic6ness #t ' m

+755+

8"-

-75-5

57::+

+7+5

inner Al diameter #dri'

receiver characteristics

mm

outer Al diameter #dre' mm

inner glass diameter #dvi' mm

outer glass diameters #dve' mm

receier surface # Are' m-

-5

)+

(

9

+7-*

C/Are"Aap/-)7!:

concentration ratio


VARTMacuum assisted

resin transfer molding process

-"5



PTC testing

Tests on Univpm.01

hydraulic circuit

test bench elements

moement system

instruments$temperature, mass ;o2 rate and D<I

water as woring !uid

temperature range:2"#$"%&

)"5



PTC testing

Results o' the tests

)"5



PTC testing

(esign and reali)ation o' a test

benchable to 2or6 2ith 2ater and heattransfer oiltesting temperature tange !+ !5+.C

tests in compliance of standards$

AS=A& St7 *)"-+!+ ><I&< !-*:5

)"5




*lobal e+cienc,

-ptical e+cienc,

Thermal e+cienc,

and

"5




*eometrical eects

/optical model

"5




materials

manufacture and assembly

operation

ntercept 'actor

/optical model

Random errors

onrandom errors /deterministcvalues

and

"5




ntercept 'actor

/optical model

Universal error parameters

"5




Thermal model # de3nition

"5




Thermal model 4 remars and

implementation

laminar, transitional and turbolent ;o2 of the;uid

implementation for both atmospheric and eacuatedreceier

properties of ;uid and air considered as a function oftemperature

fourth order nonlinear algebraic system

implemented both for 2ater and heat transfer oil as circulating;uids

iteratie process for the solution of the system

"5




Thermal model 4 results

cal

"5





cal

e?p

good agreement bet2een e?p and calculated e@ciencies

average dierence 5.62 7ma8 dierence 19.0" 7

"5





cal

opt

"5





"5

l i l i f f



Annual simulation of performance 5"5

A l i l i f f



Annual simulation of performance

imulation results: average da, o' the month o'

november

5"5

A l i l ti f f




imulation results: monthl, collected energ,

5"5

A l i l ti f f 5"5




total D<Ifallen in PTC

producible

useful

imulation results: total energies

5"5

A l i l ti f f 5"5




imulation results: total energies

P&S / +795 M"m-

5"5

parabolic solar ppt

Documents