Current Community Electricity Analysis Result

The addition of all the fur farms current electricity consumption and the food factory together make the current consumption as community consumption. After the addition the current community electricity consumption is about 7224.5 MWh/year. Table 37 presents the total current consumption of each farm and food factory and graphical illustration of the current community electricity curve is shown in Figure 44.

Table 37. Current community electricity consumption.

Farm names

Current electricity (MWh/year)

Farm 1 24.9

Farm 2 37.5

Farm 3 77.1

Farm 4 13.6

Food factory 7071

Total 7224.5

Figure 44. Current electricity consumption as energy community.

Dimension System Size Based on Annual Energy Production

Since the analysis results would be given for two directions, the exact system sizes needed to meet the current electricity consumption in annual level at the southeast and southwest is about 7.6 MWp and 7.8 MWp respectively. The total maximum capacity of all the fur farms and the food factory is about 4.3 MWp (4308 kWp) which is lower than the system annual zero energy capacity for both directions. Table 38 shows the number of panels and maximum capacity of each farms and the food factory.

0 100 200 300 400 500 600 700 800

1 2 3 4 5 6 7 8 9 10 11 12

Energy(MWh/month)

Months

Current community consumption

Table 38. Total number of panels and maximum capacity for community consumption. MWp due to lower production output at the southwest direction. However, due to more capacity at the southwest to cover the same consumption as the southeast, this makes the output production of southwest slightly higher than the southeast. The production output is about 7225.1 MWh/year for southwest and 7224.5 MWh/year for southeast. The results on how the production is distributed is illustrated in Figure 45 for the annual zero energy production capacities for both directions and also for the maximum capacity of 4.3 MWp which the roofs can contain.

(c) (d)

Dimensioning System Size without Battery

Table 39 to 42 presents the analysis results without battery for both directions. It is good to mention that there is no grid sales from 1 kWp to about 550 kWp which makes these system sizes affordable since total production is fully utilized without battery use. Above this capacity grid sales begin to occur gradually at both directions which makes it not profitable as battery would be needed to recover parts of the excess production for further usage.

0

Table 39. Southwest current sensitivity analysis result without battery.

Table 40. Southwest current energy production distribution without battery.

System

Table 41. Southeast current sensitivity analysis result without battery.

Table 42. Southeast current energy production distribution without battery.

System

Dimensioning System Size with Battery

Table 43 and 44 presents the results of the sensitivity analysis carried out with battery for the case of southwest and southeast. It can be observed from Table 32 and 33 that grid sales starts to occur with battery use at the southwest and southeast with system sizes of 4500 kWp and 4000 kWp respectively. Based on the lower capacity needed at the southeast to cover the same

portion of consumption as the southwest, this probably could make the southeast the possible direction for the installation of the solar systems.

Table 43. Southwest current sensitivity analysis result with battery.

System sizes

Table 44. Southeast current sensitivity analysis result with battery.

System sizes

Figure 46 illustrates the battery size dimensioning for the southwest and southeast directions with maximum system size of 4308 kWp and the exact system sizes required in both directions.

The use of battery with the maximum capacity of 4038 kWp at both direction reduces grid sales from about 1945.09 MWh/year to 515.42 MWh/year at southwest and from 1979.80 MWh/year to 564.89 MWh/year at southeast. However, battery is not required for 130 days and 132 days at southwest and southeast respectively. Furthermore, to cover the subsequent days the battery size needed to meet this demand ranges from 50 kWh to 1500 kWh. But to further cover the 195 days and 199 days at southwest and southeast a higher battery size above 1500 kWh would be required.

Furthermore, with 7.8 MWp and 7.6 MWp, the number of days without battery demand is 112 days and 111days at southwest and southeast. After these days there is need for battery and size ranges from 50 kWh to 1500 kWh as shown in Figure 46. Above 1500 kWh a higher battery size is needed to back up for the remaining 233 days at both directions. In addition, with battery use on daily basis reduces the grid sales from 4851 MWh/year to 3059 MWh/year at southwest 7831 kWp and 4808 MWh/year to 3058 MWh/year at southeast 7670 kWp.

(a)

(b)

(c)

(d)

Figure 46. Energy community current battery sizing analysis. (a) Battery size for southwest 4308 kWp. (b) Battery size for southeast 4308 kWp. (c) Battery size for southwest 7831 kWp.

(d) Battery size for southeast 7670 kWp.

Furthermore, an average hour analysis is carried out to determine which system size is efficient enough for the consumption on an average day. The result obtained is illustrated in Figure 47 and 48. From the Figures it can be observed the current community electricity consumption is covered at both directions. However, the production curve at the southeast is more covering than the southwest. Above the system size of 1800 kWp there is more excess output in the production curve at both directions.

(a)

Monthly average hour of the day

July

Monthly average hour of the day

September

Figure 47. Southwest current average hour analysis for community consumption. (a) Average hour analysis for July. (b) Average hour analysis for September.

(a)

(b)

Figure 48. Southeast current average hour analysis for community consumption. (a) Average hour analysis for July. (b) Average hour analysis for September.

0.0

Monthly average hour of the day

July

Monthly average hour of the month

September