Wood gasification boiler BioX

Solarbayer BioX wood gasification boilers are perfect for combustion of natural, split logs with 0.5 m log length, with lowest emission values and high energy efficiency, available in sizes BioX 15, BioX 20 (filling volume 125 L) or BioX 25, BioX 35, BioX 45 (filling volume 185 L), optionally available with BioX design front door, fully automatic heat exchanger cleaning and stainless steel combustion chamber.

wood gasification boilers BioX 15, BioX 20

wood gasification boilers BioX 25, BioX 35, BioX 45

Why choose the Solarbayer BioX wood log boiler?

BioX is the result of Solarbayers’ many years of experience in the development, production and distribution of wood log gasification boilers.
The BioX wood log boiler not only convinces optically. The separation of the heating, filling and combustion chamber doors allows a comfortable heating up and reloading. The large filling chamber enables a long burnoff period with minimum effort. An integrated flue gas outlet prevents the generation of flue gas in the boiler room and offers a smokefree reloading of the boiler. The cleaning of the BioX is very userfriendly due to its semirespectively fully automatic heat exchanger cleaning (optionally available). The extremely low amount of ash can easily be removed through the ash door.

Convincing technology

The double hightemperature cyclone combustion chamber and the used silicone carbide (SiC) that acts like a catalyst, provide for a particularly efficient and clean combustion process with very high efficiency and minimum emissions. The nitrogen oxide output is extremly low and the respirable dust pollution is hardly measurable. With its emissions it is far below the maximum permissible values specified by the German Federal Immission Control Ordinance (1.BImschV, level 2).
By using highquality and very robust components (e.g. combustion chamber bricks made of SiC) the BioX offers an extremely long service life with minimum followup costs. The wood gasification boiler BioX from Solarbayer is exemplary environmentally friendly and economical.

Brief description

• Wood log gasification boiler for central heating with upper wood gasification and lower burnoff
• solid boiler construction according to German quality standard
• easy and comfortable heating
• the large fuel chamber guarantees a long burning period
• innovative wood boiler technology
• turbulators for more performance and lower exhaust gas tempartures
• either semiautomatic or fully automatic heat exchanger cleaning
• easy handling and cleaning, low amount of ashes
• Extremely fireresistant combustion chamber made of silicon carbide (SiC)
• additional comfort-heating-door
• heating up and reloading possible without the use of the controller due to intelligent door contact switch
• solid lifting eye for easy insertion to basement boiler rooms
• modulation combustion, exhaust gas and lambda control ensure the compliance of the currently valid limit values of the Federal Immission Control Ordinance
• boiler sizes from 15 kW to 45 kW
• log length 50 cm
• door hinge changeable from right-hinged to left-hinged

1. BImSchV*, level 2:

All Solarbayer wood log boilers BioX meet the austere limit values of the Federal Immission Control Ordinance
*First Decree of the Implementation of the Federal Immission Control Ordinance (Ordinance on small and medium combustion plants – 1. BImSchV)

Why heating with wood?

Wood is the most natural and oldest fuel in the world. A healthy forest is not only a complex ecosystem and habitat, but one of the most determining factors for the global climate. Especially its role as carbon storage and producer of oxygen is essential for survival to humans and nature! Heating with wood is the best alternative compared to fossil fuels. The renewable raw material will replace common energy soruce in the long run. A tree is grown up to a usable size in 70 – 90 years whereas coal and oil need 50 - 300 million years for the comparable amount of energy.

Energy from wood is stored solar energy

With the combustion of wood only the amount of carbon dioxide required by the plant during growth is released. Thus, the raw material is on the one hand a reservoir for current emissions and at the same time a fuel for subsequent generations. Wood as fuel is not only carbon neutral, but also cheaper. It is not exposed to fluctuations in price of oil and gas and not dependent on global political crises. It promotes regional added value and makes the consumer a little more independent. Heating with wood is not only ecological but also economical. The use of the local raw material supports the regional agriculture. The stable lower price compared to fossil energy sources in connection with state subsidies for biomass plants are reason enough to rely on the natural raw material now.

Rule of thumb for the energy content of dry wood

Worth knowing

Wood gasification boilers are no ordinary boilers. They differ fundamentally in the combustion process from common wood boilers. In order to achieve the best possible combustion it is necessary to ignite the socalled wood gas. Wood gas is a hard to ignite gas consisting of carbon dioxide (CO2), carbon monoxide (CO), methane, ethylene, hydrogene and steam that could reach up to 1100°C when inflamed. But the wood gas has to exhaust from the wood. In the BioX the wood is dried automatically at 200°C. This process starts right after the filling and heating up of the wood gasification boiler in the upper combustion chamber. The residual moisture evaporates from the wood logs. Afterwards the wood starts to decompose and the ingredients lignin and cellulose exhaust as gas from the wood. These gases are ignited and already reach temperatures up to 600°C. Only now the hard to ignite wood gas is released and ignited by the supply of oxygen. The energy stored in the wood is released in the most efficient way and transferred to the heating system in the best possible way. Glowing charcoal forms a bed of embers in the combustion chamber, which is hot enough to dry further wood. At the end an extremely small amount of ash remains.

Convincing details

Discover the details

For more information on the details, please click on the numbered markers in the cutaway image.

1

Speedcontrolled induced draft fan, rotatable

Provides for best combustion and reliable suction of flue gas due to its high suction power. Extremely practical: The flue gas pipe is flexibly adjustable to the appropriate angle.

2

Turbulators with automatic heat exchanger cleaning

No more dirty hands: the standard heat exchanger cleaning with external hand lever. A fully automatic heat exchanger cleaning can be optionally added. It cleans the heat exchanger completely independent at regularly intervals.

3

Double cyclone combustion chamber made of silicon carbide (SiC)

The new unique geometry and the resulting perfect mixing of the fuel gases with oxygen acts like a catalyst and guarantees the cleanest possible combustion with an extremely high efficiency. The nitrogen oxide output is extremly low and the respirable dust pollution is hardly measurable.

4

Large fuel chamber with optionally available stainless steel lining

The fuel chamber respectively the gasifying chamber is comfortably loaded from the front, the optionally available stainless steel lining reduces tar formation at the inner walls for a long period of time and protects the boiler walls from severe hits with wood logs.

5

Comfort-heating-door

For easiest and fastet heating up of the completely filled fuel chamber, e.g. with organic igniters made of wood wool. Special advantage when cleaning: The fuel chamber is easy to clean due to the groundlevel door arrangement

6

Active exhaustion of low temperature carbonisation gas

Almost no smoke emission when refilling: Opening the filling chamber door to top up fuel automatically activates the exhaust gas fan via the door contact switch. Lowtemperature carbonisation gases are powerfully exhausted by the upper flue pipe register to the back.

7

Lambda sensor and exhaust gas temperatur sensor

8

Servomotor with washer disc

for finely dosed, perfect combustion air inlet

9

Control unit and controller

The lambda control unit with its highcontrast display is easy to handle and shows all important operating parameters. The operation is carried out via large buttons so that these can also be pressed when wearing gloves. It is easy to wipe off. The control unit supervises the exhaust gas values permanently and ensures a combustion with the lowest possible emissions and maximum efficiency even with changing fuel quality.

Variants

Stainless steel fuel chamber lining (optional)

Fuel chamber without stainless steel fuel chamber lining

Fuel chamber with stainless steel fuel chamber lining (surcharge)

Fully automatic heat exchanger cleaning (optional)

semi‐automatic heat exchanger cleaning

Fully automatic heat exchanger cleaning (surcharge)

Left/Right hinged boiler doors

Right-hinged boiler doors

Left-hinged boiler doors

Example of Solarbayer BioX wood gasifier heating

Systems that work - Solarbayer wood gasification boiler sets BioX

The combination of appropriate components is essential for the total efficiency of a wood boiler system!
Solarbayer wood log boiler sets are generelly equipped with patented Solarbayer stratification storage tanks SLS®. This guarantees an immediate and very efficient heat supply to the heating system even at cold buffer temperatures when the boiler is started. Due to the large filling chamber of BioX boilers Solarbayer recommends a minimum storage tank capacity of approx. 12 ltr. each 1 ltr. filling chamber room, to optimize the efficiency of the boiler. Regardless, legal regulations and requirements for subsidies of course have to be respected.

The single components in each set can be changed according to your needs. Our technicians will be glad to advise you.

Boiler dimensions

Technical specifications

Dimension and weight	type	BioX 15	BioX 20	BioX 25	BioX 35	BioX 45
length complete A	mm	1255	1255	1339	1339	1339
length covering A1	mm	1021	1021	1021	1021	1021
length up to end of flue spigot A2	mm	1179	1179	1194	1194	1194
width (without covering) B	mm	610 (605)	610 (605)	670 (665)	670 (665)	670 (665)
height (without covering) C	mm	1365 (1350)	1365 (1350)	1585 (1576)	1585 (1576)	1585 (1576)
flue spigot D	mm	150	150	150	150	150
fuel chamber height E	mm	260	260	305	305	305
fuel chamber width F	mm	400	400	460	460	460
flue spigot top edge G	mm	1225	1225	1494	1494	1494
flue spigot middle (G)	mm	1050	1050	1275	1275	1275
height boiler flow line H	mm	1155	1155	1380	1380	1380
height boiler return line I	mm	240	240	240	240	240
minimum distance back side J	mm	600	600	600	600	600
minimum distance front side K	mm	520	520	600	600	600
height draining L	mm	135	135	135	135	135
required mimimun room height	mm	1700	1700	1920	1920	1920
connection boiler flow/return 1 + 2	Ø	1" (IG) DN 25	1" (IG) DN 25	1 ¼" (IG) DN 32	1 ¼" (IG) DN 32	1 ¼" (IG) DN 32
connection safety heat exchanger 3	Ø	½" (IG) DN 15	½" (IG) DN 15	½" (IG) DN 15	½" (IG) DN 15	½" (IG) DN 15
connection draining 4	Ø	½" (IG) DN 15	½" (IG) DN 15	½" (IG) DN 15	½" (IG) DN 15	½" (IG) DN 15
boiler weight	kg	461	461	564	564	564

Technical facts exhaust values at 10% residual oxygen, 0°C ambient temperature., 1013 mbar	type	BioX 15	BioX 20	BioX 25	BioX 35	BioX 45
boiler nominal output	kW	16.6	19.4	25	33.6	43.2
efficiency factor at nominal output (NCV)	%	90.6	93.2	93.1	93.1	92.1
water capacity	l	77	77	108	108	108
max. operating pressure	bar	3	3	3	3	3
pressure drop at nominal load (dt 10K)	mbar	8.4	8.4	13.2	28.2	27.2
pressure drop at nominal load (dt 20K)	mbar	2.1	2.1	3.2	8	7.3
permissible pressure range discharge safety device	bar	1 - 4	1 - 4	1 - 4	1 - 4	1 - 4
water inlet temperatur discharge safety device	°C	4 - 15	4 - 15	4 - 15	4 - 15	4 - 15
opening temperature discharge safety device	°C	95	95	95	95	95
noise level at 30% load (at 90%)	dB	36 (44)	36 (44)	36 (44)	36 (44)	36 (44)
usable heat output	kW	15.0	25.1	26.0	41.1	40.6
partial output operation		nein
fuel supply (manually / automatically)		manually
calorific value utilization (yes / no)		nein
combination boiler for hot water and heating (yes / no)		nein
combined heat and power generation (yes / no)		nein
fuel efficiency at nominal output (GCV)	%	82.4	84.7	84.6	84.6	83.7
auxiliary power consumption standby	kW	0.001
auxiliary power consumption nominal output	kW	0.025	0.022	0.033	0.034	0.049
energy efficiency class	--	A+	A+	A+	A+	A+
Energy Efficiency Index EEI	--	115	119	119	119	118
room heating annual utilization rate ηs	%	78	81	81	81	80
dust emission PM	mg/mn³	14	12	12	11	11
OGC emission	mg/mn³	1	2	3	4	4
CO emission	mg/mn³	38	34	33	32	32
Nox emission	mg/mn³	159	151	157	162	161
room heating annual emissions - dust	mg/mn³	14	12	12	11	11
room heating annual emissions - OGC	mg/mn³	1	2	3	4	4
room heating annual emissions - CO	mg/mn³	38	34	33	32	32
room heating annual emissions - Nox	mg/mn³	159	151	157	162	161
ⴄson	%	82,4	84.7	84.6	84.6	83.7
F1	%	3	3	3	3	3
F2	%	1.3	0.9	0.8	0.6	0.4
product data sheet according to (EU)2015/1187 (PDF file)	PDF
product label according to (EU)2015/1187 (PDF file)	PDF
Producer		Solarbayer GmbH, Am Dörrenhof 22, 85131 Pollenfeld/Preith

fuel chamber/fuel consumption	type	BioX 15	BioX 20	BioX 25	BioX 35	BioX 45
admissible fuel		ntreated, split wood log with residual moisture <20%
max. wood log length	mm	550	550	550	550	550
fuel chamber depth	mm	590	590	590	590	590
fuel chamber height	mm	525	525	665	665	665
fuel chamber width	mm	400	400	460	460	460
dimension of the filling hole w/h	mm	400/260	400/260	460/305	460/305	460/305
fuel chamber capacity, volume litre approx.	L	125	125	185	185	185
max. filling weight (beech) approx.	kg	40	40	54	54	54
fuel consumption at rated power (beech) approx.	kg/h	5	6.7	6.8	7.7	7.5
combustion period at nominal load (beech) approx.	h	6	5	7	6	4.5

Exhaust gas routing	type	BioX 15	BioX 20	BioX 25	BioX 35	BioX 45
recommended min. chimney cross section	mm	150	150	150	150	150
draft requirements	Pa	-10...-15	-10...-15	-10...-15	-10...-15	-10...-15
effective minimum chimney height	m	7	7	7	7	7
exhaust gas mass flow	g/s	9.8	12.2	15.2	21.2	27.2
modulating exhaust gas temperature	°C	180	220	180	200	240
recommended exhaust piping length		developed length < 1,5m (max. 2 curves)
barometic damper		definitely recommended

Electrical data	type	BioX 15	BioX 20	BioX 25	BioX 35	BioX 45
mains voltage / frequency	V/Hz	~230/50	~230/50	~230/50	~230/50	~230/50
power consumption standby	W	< 0.3	< 0.3	< 0.3	< 0.3	< 0.3
power consumption operation	W	90	90	150	150	150

Hydraulic	type	BioX 15	BioX 20	BioX 25	BioX 35	BioX 45
recommended min. buffer tank volume 1)	L	1000	1500	2000	2000	2500
manufacturer's recommendation 1)	L	1500	2000	2500	2500	3000
min. tube dimension (CU-/steel precision tube) Ø 2)	Ø mm	28	28	35	35	35
min. tube dimension (steel tube) 2)	Ø	1" DN 25	1" DN 25	1 ¼" DN 32	1 ¼" DN 32	1 ½" DN 32
preset min. bioler return line temperature for the Solarbayer boiler charging unit (controlled by boiler control unit)	°C	70	70	70	68	66

rotatable exhaust gas connection resp. fan (ca. 0° - 135°)

Video about heating up a wood gasification boiler Solarbayer BioX