Heat exchanger

Latest addition to the fire ,16 section's of box section firetubes (650x50) which works out at 2.08m² (22.389ft²) its a 2 pass

Welded on both sides bit tricky (tight space) will have to see how this holds up to the heat (normally firetubes are an expansion fit)

This will be the diversion plate.Directing the heat through heat exchanger.This will still enable wood to be burnt.

All Tubes welded in both side's.Just got to encapsulate in tank .

Flame starts in bottom where wood fire  used to be everything is water jacket except front door 

 Here you can see smoke/heat travel

Due to lack of heat exchanger im proposing putting one on the back of the fire and making it a 2 pass exchanger

Flu boiler

 Cycle times are a bit long so decided to put a tank in the flu .I had one here originally when burning the wood .This time its a little smaller as before it took too much heat out causing loads of tar build up in the flu.

 Tank is 350mm x 400mm x 70 through the middle are 50mm box section's to help increase surface area .Around the tank is 75mm clearance ,kinda hoping that we get no soot bridges ...time will tell.

 Top View

 Top view no flash

 Tank installed in back of fire / flu .Quick release over center catch's aid cleaning

Update on the waste oil scenario

 After too over fills in the constant level tank I've made my own float switch with micro switch(not so micro) and cork floats seems to work ok fingers crossed

 Due to the high viscosity of some gear oil .A water pre-heater was made so oil will flow to constant level tank

 Standard central heating pump circulates water round pre-heater

 Bottom of pre heater with new filter arrangement ,also water trap before and after filter

 The constant level tank was moved to other side of fire as the heat from it was melting the motor and control box.Still bolted to the door which pre-heats the oil with no electric(after initial start).Tank is aluminium.

 Regulator was pants on the little compressor ,so here we have a modified acetylene gauge which gives very accurate pressure through all temperatures .

 Bottom of pre-heater showing tap for water drain

Flame in fire box with an angle target plate ,this stops flame touching the boiler plate and spreads heat a little more even