Induction cooker vs. LPG stoves

[rdpzycho]

di pwede sa lugar namin ito.. 
sisigawan ka ng kapit bahay mo.. dikit dikit bahay kasi dito.. masyado mausok yan

dikit dikit din dito, sa may kalsada sila nagluluto ng gatong. minsan may nagle-lechon din sa kalsada.

minsan kasi na obserbahan ko lang... 24 hours yung bulalohan...
then... parang "hindi" na napapalitan yung sabaw or nililinis yung kaldero.
dinadagdagan na lang nang tubig. medyo green na din yung bula..
who knows ayun nga yung secret nila.

katulad din nung mga pritong manok, mahigit isang linggong gamit 'yung mantika.

[sonski]

nawawala na yata sa topic

[Ganda692002]

540php per month medyo mas mahal parin sa gas stove kasi generation charge palang yun mga kulang kulang 1k nayan per month sama pa distribution charge etc.. 640php ang gasul dito samin naglalaro 500+ to 600..

pero mas may mura meron ako de uling yun lang mausok at mahirap buksan.... binili ko pa sa TV shopping yun hehehe... gawa ng pinoy hehehe
pero sa terrace naman yun ginagamit pag nagluluto..

[rdpzycho]

^ total bill ako kumukuha ng average, generation + distribution + etc. bill namin last January, 1500+ para sa 189kWh, halos 8 pesos per kWh. pero mas madalas ako mag-compute sa 10 pesos per kWh para whole number.

6.99 PhP sa generation, 0.82 PhP sa distribution, + other charges.

[marcelino]

So ano na ang hatol nyo?

heheh... actually bigla akong nalito kung alin na ba ang mas economical.


pero sa convenience go pa din ako sa cooker na to. nagpaplano na nga ako next week bumili. makakatulong to kay boss wife kasi sya ang unang gumigising. pangpakulo ng tubig (sya ang nauuna sa trabaho kasi).

[rdpzycho]

^ wala talaga akong comparison. assumption ko lang 'yung unang cost, at 'di rin kami umaabot dun kasi mga 30 minutes a day lang luto dito.

pero mabilis talaga magpakulo/magpainit sa induction. 'yung mismong kaldero kasi ang umiinit.

[MX45]

how much.. kaya ang Induction cookers na yan. available na ba yan sa mga SM?

[rdpzycho]

yup. around 3k to 5k siguro 'yung mga single burner.

sa SM ang karamihang nakikita kong binibili (both Induction Cooker at Microwave), American Home 'yung tatak.

'yung gamit sa bahay, nakuha lang ata sa raffle ng tatay ko. malaki-laki rin nabawas from conventional electric range.

[insomartin]

may 1,500 or 1750 may kasama nang stainless na cookware.

[MX45]

may 1,500 or 1750 may kasama nang stainless na cookware.

medyo okay din lang pala ang price o depende rin sa brand? ano kayang brand ang mahusay pagdating dito sa Induction cooker? baka sakali this payday ay makabili nyan.

[rdpzycho]

onga pala, hindi lahat ng kaldero/kawali/lutuan, ay pwede sa Induction Cooker.

[marcelino]

ayon sa nabasa ko, basta daw namamagnet ang pot, pwede daw.

[MX45]

wow pano yan puro palayok panaman ang lutuan namin..

[iyo karpo]

ayon sa nabasa ko, basta daw namamagnet ang pot, pwede daw.

Kahit na ung stainless steel ko na seiko 5 uminit sa induction furnace na inoperate ko noon.

[iyo karpo]

wow pano yan puro palayok panaman ang lutuan namin..

dapat mataas ang iron content or ferromagnetic material nito.

[rdpzycho]

merong mga cookware na linagyan lang ng makapal na bakal sa ilalim para magamit din sa induction. ang problema nga lang, meron pa ring conduction path bago talaga uminit 'yung pinaglulutuan kaya bawas sa efficiency.

[rotaboyph]

I got this table from Wikipedia.

http://en.wikipedia.org/wiki/Induction_cooker

Technology   Efficiency   Time required to boil 2 quarts (1.9 litres) of water   Energy consumption when boiling 2 litres of water (from 20 degrees Celsius)

Induction stove   83 to 90%[5]   4 minutes 46 seconds   745 kJ             
Halogen stove   60%                   9 minutes 0 seconds   1120 kJ
Electron Coil or Cast Iron55%           9 minutes 50 seconds   1220 kJ
Gas   40%[6]                           8 minutes 18 seconds   1700 kJ

Based on these value, what at unit I want to know is

Peso to Boil 1.9 Liters of water using LPG
Peso to Boil 1.9 Liters of water Using Induction cooker

I tried to calculate it using this value pero di ko nakuha. Anyone? Kung nakinig sana ako sa teacher at proffesor ko noong nag aaral pa ako....

[rdpzycho]

para sa Induction Cooking.

1J = 1Ws = 1/3600 Wh
745 kJ = 745000J = 745000 Ws = 206.94 Wh * (approx.) 8 to 10 PhP / kWh (generation + distribution + miscellaneous) = 1.66 to 2.07 PhP to boil 2 liters of water.


for LPG, hindi ko alam kung ano ang exact calorific value niya pero ang nakita ko around 11,900 kcal/kg. approximately, 49,800 kJ/kg.

49800 kJ/kg x 11 kg = 547800 kJ per LPG tank.

kung 600 PhP ang isang 11 kg tank, 1700 kJ / 547800 kJ * 600 PhP = 1.86 PhP to boil 2 liters of water.

sa mas nakakaalam ng computation sa LPG, paki-correct na lang po kung mali 'yung computation ko. nakalimutan ko na 'yung thermodynamics. hehehe.

[GOwin]

Dahil hindi naman ako makatulog ...

Here's comparison data of Induction Gas vs LPG from Wikipedia I used as basis for computation:
Energy consumption when boiling 2 litres of water (from 20 degrees Celsius)
Induction stove   745 kJ
Gas   1700 kJ

Because of the high efficiency of induction cookers, it takes 43% less energy to boil 2 liters of water. 

Given the following Energy Densities:
Electricity ... 1 kW = 3,600 MJ
LPG ... 11kg x 50.4 per kg = 554.4 MJ

... and using the following fuel prices:
Electricity -    P 8.70 per KWH
LPG      - P 710.00 per 11kg cylinder

Therefore the cost of fuel for boiling 2L of water used above are as follows:
Induction Stove: 0.00180041666667 PHP
LPG : 2.17712842712843 PHP

PS
All of the above is correct, unless it's not. I failed Algebra 101 during my froshie year in Uni ....

PPS
Spreadsheet calcuations:
Cost of Fuel   MJ / Unit of Energy   Consumption (MJ)      Cost of Fuel Consumed
8.7   3600   0.745   0.02%   0.00180042
710   554.4   1.7   0.31%   2.17712843

   

[franzschluter]

Definitely induction cooker. Kinainis ko lang dito is binili ko dati ito for 50k++ 5 years ago from a restaurant that was about to close. Cast iron nga lang pwede pang luto. Aluminum etc etc cooking wares out of non ferrous will not work as this is not magnetic. And in terms of usage we cook sa house usually 4 hours a day. We boil potatoes, fry potatoe (not french fries), fry the steak in olive oil, fry the onions seperately etc etc.. Hays kagutom na.

Ang maganda pa dito is walang wasted energy gaano. Ang bilis mag luto compared to LPG. Pag on mo ng magnet instantly halos mainit na ung cooking ware.

There might be some stuff not yet included like for example the transfer of heat It takes considerable amount of time to transfer heat. Although I failed many times in chemistry >.<. They never gave questions how long it would take to boil 1 liter of water. They only mentioned how much energy it takes though.

If I hold a piece of steel in the flame it will take a considerable amount of time before the heat reaches my hand. This can reach up to minutes kamo depending on how long the steel is. I mentioned this since our meralco is based on power and time. And sa induction oven the heat is transferred way faster than what a LPG does. The only thing what a induction oven doesn't have is an OVEN. So roasting and baking is out of the question.