Nikoloz Sumbadze 2/6/2014

Like

1989 Views

Hi,

I have following question:

In my leap model I have following branches "households/urban/space heating" which has 100% of saturation level ( all urban households use space heating) and using following energy sources: wood -30% (share of households), electricity-20% (share of households), natural gas 50% (share of households).

At the same time, I have another branch "households/urban/water heating" which has 100% of saturation level ( all urban households use water heating) and using following energy sources: wood - 20% (share of households), electricity-40% (share of households), natural gas 40% (share of households).

how one can interpret these percentages for activity level? e.i. 1) does it mean that for example 30% of total urban households use only wood for space heating and not other fuels? 2) when i am inserting energy intensity for wood in space heating (5 cubic meter) and in water heating (2 cubic meter) does it mean that a household using wood for both activities consumes 7 cubic meter of wood or it is possible that they complement each other?

Taylor Binnington 2/6/2014
 

Like

1983 Views

Hi Nikoloz,

Your interpretation (listed as point #1) is correct - this means that 30% of households use only wood for their space heating, or equivalently, that 30% of the energy supplied to households for space heating is supplied by wood. You read this as: 100% (of urban households that use space heating) * 30% (of space heated households that use wood) = 30% (of urban households that use wood for space heating).

Your second point, #2, is also correct. Since space and water heating are treated as separate branches under urban households, their energy requirements will have to be satisfied separately. So, for a hypothetical urban household that uses wood for both its space and water heating requirements, it would use 7m3 of wood.

Hope this helps,

Taylor

Nikoloz Sumbadze 2/7/2014
 

Like

1974 Views

Dear Taylor,

Thanks for your reply it was helpful. your comment for my second point is clear. but I still have concerns about my point #1. let me provide more details in this regard.

So, In demand, I divide household branch with urban and rural level. For both, urban and rural branches, I have cooking, space heating and water heating sub-branches. I assume that only these branches/activities use wood as a fuel source.

At the same time, I assume that there are 1,200,000 households in Georgia out of which 630,000 lives in urban and 564,000 in rural.

Furthermore, I assume that only 55% of households (660,000 households) use wood for above-mentioned activities. I consider on average 10 m3 of wood for each household. So it in total is 6,600,000 m3 of wood for household's consumption, out of which 32$ (2,112,000 m3) is consumed by urban households and 68% (4,488,000 m3) by rural households.

I consider that both urban and rural households use wood for cooking, space heating and water heating with following percentages:

cooking 17%
space heating 59%
water heating 24%

after this percentages urban and rural households wood consumption is divided following way:

1) urban = 2,112,000 m3
cooking 359,040 m3
space heating 1,246,080 m3
water heating 506,880 m3

2) rural = 4,488,000 m3
cooking 762,960 m3
space heating 2,647,920 m3
water heating 1,077,120 m3

Also I know that in urban and rural activity levels for cooking, space heating and water heating is following

1) urban
cooking 9% (57,240 households)
space heating 32% (203,520 households)
water heating 16% (101,760 households)

2) rural
cooking 24% (135,360 households)
space heating 81% (456,840 households)
water heating 49% (276,360 households)

based on this information i want to get wood's energy intensity for each activity (cooking, space heating, water heating). so I just divide wood consumption by each activity to number of households. so I got this:

1) urban (energy intensity)
cooking 6.27 m3
space heating 6.12 m3
water heating 4.98 m3

2) rural (energy intensity)
cooking 5.63 m3
space heating 5.79 or 5.80 m3
water heating 3.89 m3


I would like to ask to review and help me if I am doing this correctly. If I am wrong please suggest me correct way.

Taylor Binnington 2/7/2014
 

Like

1960 Views

Hi Nikoloz,

You appear to have competing assumptions. On one hand, you seem to state that 9% or urban households cook with wood, and that these households use 6.27 m3 of wood per household. But on the other hand, you state that 55% of all households use wood for all activities, using 10 m3 per household. So you need to stick with a single set of assumptions, which may mean that you need to do some preliminary calculations before entering data into LEAP. For example (let me try to describe what part of a tree in LEAP might look like):

Households: 1,200,000
-> Urban: 100% * 630/1200 percent share of total HH
--> Cooking: 9% saturation of urban HH
---> Wood stove: 100% share of cooking urban HH using 6.27 m3 wood per cooking urban HH

... and so on...

Try starting from the top and working down until you reach an energy-using device, as I have in this example.

Hope this helps,

Taylor