FAQ Solar Water Heater

8/11/2019 FAQ Solar Water Heater

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FAQ SOLAR WATER HEATER

1. Does this Solar Water Heater work in any climate?

Solar water heaters can oerate in any climate. !er"ormance #aries $een$in%& in art&

on how m'ch solar ener%y is a#aila(le at the site& ('t also on how col$ the water

comin% into the system is. Only $'rin% rainy season yo' will nee$ a con#entional(ack' system )Electric*.

+. ,s there any maintenance re-'ire$ "or SWH systems?

Solar Water Heaters once installe$ re-'ires #ery little maintenance. aintenance

in#ol#es wiin% the $'st $eosite$ on the %lass s'r"ace once in / $ays. Wiin%the %lass e#ery $ay will hel increase the e""iciency o" the system. Other imortant

thin% to (e taken care o" is to see that the main col$ water tank "rom which water is

s'lie$ to the solar tank is always "ille$ ' to the le#el. 0se o" A'tomatic Le#elcontroller can hel in maintainin% an otim'm le#el o" water.

. What i" my area has har$ water?

D'e to the smoothness o" the %lass t'(e& the s'r"ace is not easily s'sceti(le toscalin%. Also& the lar%e $iameter o" the t'(es ens'res that minor scalin% $oes not

ime$e the e""iciency o" the system.

2. What i" , ha#e hi%h ress're (ath "ittin%s s'ch as rain showers& 3ac'44is or (o$y 5ets?

We ha#e a ran%e o" ress'rise$ systems a#aila(le to cater to hi%h ress're (ath

"ittin%s.

/. How $o , inte%rate the heater with my c'rrent l'm(in% system witho't any

(reaka%e?

O'r system is #ery easy to install an$ inte%rate with all kin$s o" e6istin% l'm(in%systems witho't any (reaka%e to e6istin% l'm(in%. O'r installation e6erts will #isit

yo'r site an$ ro#i$e yo' with a $etaile$ lan on how the system can meet yo'r

re-'irements.

7. How $oes 'se o" solar water heater hel the en#ironment?

A 188 litre system& the a#era%e si4e o" a ho'sehol$ o" 9 2 eole& can re#ent

emissions o" 8.2 to 1.8 tonnes o" car(on $io6i$e er year. The re$'ction in emissionso" car(on $io6i$e )one o" the ma5or %reen ho'se %ases* can ositi#ely hel in slowin%

$own the ace o" %lo(al warmin%.

:. What are the maintenance re-'irements?

ET; (ase$ solar water heaters $o not nee$ si%ni"icant maintenance. The collector

t'(es may nee$ ann'al cleanin% to remo#e acc'm'late$ scale an$ se$iment $eositsat the (ottom.


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The %lass 'se$ to make these t'(es is not or$inary %lass ('t #ery stron% (oro9silicate

%lass& which ena(les the t'(es to resist hail stones as (i% as +/ mm )1 inch* $iametersi4e.

=. The si4es o""ere$ (y yo' are in m'ltiles o" 188 litres. What i" , re"er some other

si4e like /+8 litres?

>ormally& we ha#e rea$y stocks o" the stan$ar$ si4es in m'ltiles o" 188 litres.

Secial si4es can (e ma$e on re-'est an$ will take more $eli#ery time.

18. What shall , $o in case some t'(e (reaks? ;an , relace the (roken t'(e mysel"?

The (roken t'(e will ha#e to (e relace$ (y o'r team. ,n case o" water leakin% o't o"

the system "rom (roken t'(e& lease sh't the inlet an$ o'tlet #al#es an$ in"orm 's at

the earliest so that yo'r system can (e 't in or$er witho't any $elay.

11. Are a$$itional %eysers re-'ire$ a"ter installation o" Solar Water Heatin% System?

The Solar Water Heatin% System has in('ilt otion o" electrical (ack9'& an$ so no

e6tra %eysers are re-'ire$ in the (athrooms.

1+. ," $i""erent 'se oints are scattere$ an$ the caacity re-'ire$ is lar%e how can ,minimise the wasta%e o" hot water in the ielines?

,n s'ch a case& instea$ o" a sin%le lar%e system& a n'm(er o" smaller systems can (einstalle$ which ha#e same total caacity as $esire$. These systems can (e lace$ at

locations closer to the 'se oints& th's minimisin% the iin% cost an$ the wasta%e o"hot water too.

1. Why new@ ET; )E#ac'ate$ T'(e ;ollector* Technolo%y is (etter than the ol$@ F!;)Flat !late ;ollector* Technolo%y?

The ET; technolo%y is almost a $eca$e ol$ an$ th's not so new This technolo%y&

tho'%h m'ch s'erior an$ s'ita(le than F!; technolo%y& co'l$ not take9o"" (ein%

more e6ensi#e than F!; technolo%y. ,t will (e o(#io's that the only a$#anta%e F!;e#er ha$ o#er ET; was lesser rice. B't >OWADACS& with recent worl$wi$e

a$#ances in mass ro$'ction techni-'es o" e#ac'ate$ t'(es& ET; (ase$ systems are

more cost e""ecti#e than their F!; co'nterarts. ,n other wor$s& F!; systems are aso(solete as tyewriters in the com'ter a%e.

12. How is the Solar Hot Water System seci"ie$ ? What is L!D ?

The caacity o" a solar hot water system is seci"ie$ is L!D. ,t is a short "orm "or

Liters !er Day. The intensity o" Solar ra$iation #aries thro'%h o't the $ay& hencecaacity cannot (e seci"ie$ in terms o" ho'rly o't't.

1/. What is FT; ?


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FT; means Fi6e$ Temerat're ;ontrol.

The oeration o" the circ'lation 'm o" "orce$ "low system nee$s to (e controlle$ toa#oi$ 'min% o" col$ water into the hot water stora%e tank. ,n FT; control& it is

achie#e$ (y monitorin% the temerat're at the o'tlet o" the collector. The 'm is

switche$ O> only when the o'tlet temerat're is hi%her than the SET temerat're. ,"

the temerat're "alls (elow the SET temerat're& the 'm is a'tomatically switche$OFF.

17. How $o , i$enti"y a %oo$ solar water heater?

A %oo$ solar water heater sho'l$ ha#e s'""icient collector area. For e6amle& on a

s'nny winter $ay in >orth ,n$ia& a s-. m. o" collector area can heat aro'n$ /8 liters o"water to a temerat're o" 8928;. Tyical "lat late collectors ma$e in the co'ntry

ha#e an area o" aro'n$ + s-. m an$ are th's caa(le o" heatin% 188 liters o" water er

$ay. F'rther& the collectors sho'l$ 'se %oo$ materials an$ the a(sor(ers sho'l$ carry a%oo$ -'ality coatin% )B,S aro#e$ collectors the (est*

1:. Why sho'l$ , install a solar water heater?

Solar water heaters sa#e (oth electricity an$ money. As electricity is (ecomin% moree6ensi#e& a solar water heater is a %reat way to access +2: hot water at "ar cheaer

rates. They are also sa"er than electric %eysers as they are locate$ on the roo" an$ are as'er way to $islay yo'r commitment to the en#ironment

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9 >o sha$owin%

9 So'th orientation o" the collectors9 ;ollector Tilt I Latit'$e J 1/8 thereo"

9 O#er hea$ tank a(o#e SWHS system

+1. Does it %enerate hot water on all $ays an$ in all seasons o" the year ?,t %enerates hot water on9 ;lear s'nny $ay 9 a6im'm

9 !artially clo'$y $ay 9 o$erate

++. ;an we 'se any tye o" water s'ch as m'niciality treate$ water& (ore well water or

tank water ?Only so"t an$ ota(le water.

9 har$ water with secial 5acket tye heat e6chan%er or with so"tener.

+. What a(o't ielines ?al#ani4e$ steel ies o" class KBK "or col$ water line recast !0F ins'late$.

HD!E !ie with KBK class al#ani4e$ ies "or Hot Water Lines

+2. Co' sai$ that the hot water will (e a#aila(le "or 889+/ $ays in year. How a(o't therest o" the $ays ?

E#ery SWHS can (e ro#i$e$ with a'6iliary (ack ' heatin% system (y Electrical

heater at e6tra cost.

+/. How m'ch money $o we ha#e to sen$ "or maintenance ?aintenance is ne%li%i(le9 !erio$ic %lass cleanin%

9 ;heck "or leaka%es an$ #al#e "'nctionin%& i" any.

+7. Are there any %o#ernmental incenti#es& s'(si$ies& loans etc. ?

Ces

9 So"t loans "rom Bank BAFL at low interest.9 188 M $ereciation ta6 relie" "or ro"it makin% comanies.

9 >o Sale Ta6& E6cise Octroi on SWHS

+:. How many ho'rs are re-'ire$ to heat the water ? 9 >ormally& 7 to : ho'rs o" normal solar ra$iation is re-'ire$ to heat the water 'to

78N;

+o E#ac'ate$ T'(e ;ollector Flat !late ;ollector

1 Q'ick heat %eneration Slow heat %eneration

+;ollector e""iciency on hi%her temerat're is

hi%h;ollector e""iciency on hi%her temerat're is low.

Heat loss in the t'(es $'rin% the $aytime is

ne%li%i(le )e#ac'ate$ t'(es*

Heat loss in the collector tank $'rin% the $ay9

time is hi%h $'e to con#ection.


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2 ;on#ection an$ ;on#ectin% losses is low. ;on#ection an$ ;on#ectin% losses is hi%h.

/ Emissi#ity is low. Emissi#ity is hi%h.

7Satis"actory er"ormance e#en in e6treme col$

con$ition )91< $e%. ;*

Free4in% o" water will take lace at hi%h altit'$e

ca'sin% $ama%e to the collector.

: Temerat're ran%e "rom 78$e%. to 1+8 $e%. Temerat're ran%e "rom 78 $e%. to


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Fi%'re rah o" e""iciency )* an$ Temerat're )T* ran%es o" #ario's tye o" collector )Solar

Ra$iation 1888 Wm+ *

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FAQ Solar Water Heater