WARNING: THIS BUILD NEEDS TO BE IN THE SPAWN CHUNKS TO WORK EVERYWHERE,IT'S ALSO SOMEWHAT DIRECTION AND POSITION DEPENDENT,IF THINGS DON'T WORK,TRY MOVING COMMANDS AROUND!

I have done it! I've made something cool!(or should I say HOT?) An energy system in VANILLA minecraft using command blocks!

Commands: 
/scoreboard objectives add BeaconicEnergy dummy --creates a scoreboard (for players)

scoreboard objectives setdisplay sidebar BeaconicEnergy --shows scoreboard

/scoreboard players set @a BeaconicEnergy 0 --reset everyone's energy.

scoreboard objectives add Energy dummy --creates a scoreboard (for Items)

fill ~ ~-1 ~ ~-8 ~-1 ~ redstone_block and fill ~ ~1 ~ ~-8 ~1 ~ air  --creates a one-tick command block clock

scoreboard players set @e[type=Item] Energy 1 {Item:{id:minecraft:redstone_block}} --gives the redstone block a score of one

execute @e[type=Item,score_Energy=1] ~ ~ ~ detect ~ ~-1 ~ beacon 0 scoreboard players add @p BeaconicEnergy 1000

AND execute @e[type=Item,score_Energy_min=1] ~ ~ ~ detect ~ ~-1 ~ beacon 0 kill @e[type=Item,score_Energy=1]

--Creates energy and destroys the redstone block

scoreboard players set @e[type=Item] Energy 2 {Item:{id:minecraft:nether_star}} --gives nether stars a score of two

execute @e[type=Item,score_Energy_min=2] ~ ~ ~ scoreboard players remove @p[r=5,score_BeaconicEnergy_min=1] BeaconicEnergy 1    --drains energy every second

This command ^^^^^^^ outputs a redstone signal into a comparator,which then outputs into an inverter/NOT gate connected to

execute @e[type=Item,score_Energy_min=2] ~ ~ ~ execute @p[r=5] ~ ~ ~ execute @e[type=Item,score_Energy_min=2] ~ ~ ~ blockdata ~ ~-1 ~ {BurnTime:20,CustomName:Electralized Furnace,CookTimeTotal:20}  --Electralizes the furnace

It does so by setting the BurnTime tag to 20ticks,meaning it will always be on, and by setting the CookTimeTotal tag to 20ticks,meaning an Item will cook in one second,making it A LOT faster.