Mulberry Insert Stove and Fireplace door

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I had an opportunity to closely examine the Mulberry insert stove recently. Additionally I had a look at the new Mulberry fire-front made with a back-boiler in mind.

The Mulberry is distinguished by the "bay window" effect of having the firebox protrude from the front, this gives two effects, (1) It allows a much wider angle of view of the fire, but more importantly, (2) It exposes a larger area of stove to the room thus give more radiant and convected heat from this larger area.
One negative that comes to mind is the cost of replacing the glass. My guess it would cost perhaps as much as a fifth to a  quarter of  the cost of the stove.

The convection "box" of the Mulberry is in mild steel. This, in my opinion, offers three possible advantages, (1) It will not crack or damage easily on installation or handling, (2) The mild steel metal inner wall is thinner than a cast wall and therefore allows a larger area for better air flow within the chamber. (3) Mild steel is much smoother in finish and that surface on the inside the convection chamber will give better airflow with less drag.

 

Other features I noticed on the Mulberry insert are (1) The much longer slots, and (2) the additional side outlet outlet of the convection chamber. This would assist a better airflow from the convection channel.

In the above photo you can clearly see the air wash intake which is taken from the front of the door, and not from the convection channel as is the case in some stoves I have seen. Taking the air-wash air from the convection channel essentially robs some of the hot air and sends it up the chimney. 

Another detail you can see is that the door handle latching point is quite a smallish cut into the convection channel wall, and therefore less likely to cause any disturbance to the air flow pattern.

All of the above said, I have not as yet observed the Mulberry insert in operation, nor have I spoken to users and got their views. Speaking to one retailer, the feedback seems to be positive with a much more satisfactory heat output than some other inserts.

A Look at the Mulberry "Fireplace Door"

I had a quick look at the Mulberry fire front or fireplace door. It is constructed from the same castings as the insert stove, with just the firebox and the convection box removed.

It also has a drop-down fire grate and a large square-shaped baffle. The price though is VERY expensive for what is essentially a cut-down stove.

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Smoking Stoves Downdraught and Cowls

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I have written, fairly extensively, about down draughts, pressure zones, smoking fires and stoves, and some of the means of fixing those problems.

One item that helps, in a lot of cases, is the "Anti-Downdraught Cowl". This type of cowl utilises the Venturi effect. (If you want to find out more look up my previous posts on the subject).

The problem is the cost of anti-downdraught cowls. Up to fairly recently this type of cowl was brought in from the UK and the average retail price was well over €100. The price put a fair few people off trying one of these cowls.

An Irish company now make a tidy stainless steel version of the anti-downdraught cowl and the recommended retail price - including VAT is just €55.

The cowl is made by EuroCowls Cork and the designation of this particular cowl is the "Static". At €55 RRP inc. of VAT it represents great value and additionally supports Irish business.

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Review Smokeless Coals Calco Hi-Lite Cosyglo

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Price v/s Quality

Smokeless Coals
Please NOTE I have an
Addendum on CALCO-MIX
http://wood-pellet-ireland.blogspot.ie/2015/12/an-update-on-calco-mix-it-has-come-to.html  
Recently Sept - Dec 2015 Calco-Mix has, in some instances,
been found to have a high level of stones in it.

With the heavy Irish government double taxation on heating oil bringing the price to €900 per 1000L fill, coal has emerged as an economic alternative for domestic heating.

Yea -Yea - I know a sustainable energy blog promoting coal!! With fuel poverty soaring towards 50% in Ireland, I have had a complete change of mind and heart. I now am inclined to say let the fat cats, the rich, and the grossly overpaid Irish parliament - complete with their over-the-top expense drawings -  worry about the carbon credits. When many in the country either cut their food or cut their heat to survive.

If you should find yourself in the position where it is a question of either EAT or HEAT, I would bet most of you would not give a fig what form of fuel provided you with heat, once you could afford it.


I am 100% coal this winter.

I have to date this winter not used one drop of heating oil in my home. Why would I? I don't like being ripped off. Instead, I have used almost 100% smokeless coals in my experimental fireplace which has a Firebird back boiler and a firefront door fitted.

This post is an attempt at reviewing the results of the different coals I have tried. Essentially I have used three types of smokeless coal:

1. Calco Smokeless Coal.

 Calco Smokeless PetCoke and Union Nugget mix
The Lignite briquittes are not in fact Unio - see below

I have written about Calco smokeless mix a couple of times before. There is some controversy out there regarding the use of Calco. Some stove manufacturers will not guarantee their appliances if Calco is burned, as they claim it will damage grates and baffles. I have used Calco in my firefront fireplace consistently for nearly four months, so far there is no detectable damage whatsoever.  I am very happy with several facets of Calco:

The pros;
(a) Calco gives excellent heat output.
(b) It has very low ash compared to other coals.
(c) It can easily burn over-night for up to nine hours.
(d) It is tops in respect of value for money.

The cons;
(a) It can burn too hot if you do not control the burn rate.
(b) It smells worse than other coals.

Update:  

The lignite nuggets are not Union, they are nuggets from Rheinbraun. This is the 2'' lignite briquette of REKORD produced by Vattenfall Europe Mining. They are clearly and easly to detect by its size (2'' REKORD instead of 3.5'' Union) and the letter L, standing for Lusatian REKORD briquettes. (Thank you Alexander Spaak of Vattenfall Mining for the heads-up)

2. Hi-Lite or "Glovoids" "EcoBrite" nuggets.

"Hi-Lite", "EcoBrite" or "GloVoids" formed nuggets

I have long maintained that Cosyglo Gems is one of the best quality smokeless coals to use in a stove or fireplace. Price is the problem. My local dealer Econ Fuels in Tralee introduced me to Hi-lite ovals, also known as "Glovoids", and as far as I know these ovals are from Arigna Mines and most probably the original name is EcoBrites from Arigna Mines. Hi-Lite, or EcoBrite has a very similar burn characteristic to CosyGlo and I would consider it as good. It is some 15+% cheaper than CosyGlo.

3. CosyGlo made by Arigna Mines.

Sold by BNM Cosyglo on the left, Glovoid or EcoBright on the right

CosyGlo is a very good quality smokeless coal and burns very well indeed in stoves without undue danger of overheating. What I have against CosyGlo is the price. The price tends to be bumped up because of the way it is sold. Bord na Mona (BnM) only sell it direct to customers at the top price. The bellmen, or door to door fuel salesmen, that BnM wholesale to, tend to add on a good whack to the price - in some cases asking as much as €20 for a 40Kg bag.

The end result is a that good coal becomes too expensive!! This does not serve the public well, and especially the 30+% of the Irish public who find themselves in fuel poverty. BnM IMHO need a better business strategy, given they are a semi-state body supposed to be serving the public.

PRICES IN ASCENDING ORDER

All the prices are general small quantity including delivery prices, and are correct at 13th February 2012.  For ease of comparison I have quoted for a 40Kg size bag. The high-lite smokeless ovoids actually come in either 25Kg or 50Kg bags. The prices of Calco and Hi-Lite are based on my local dealers Econ Fuels price which, for reasonable quantities, and in the local area, includes delivery.  The price of CosyGlo varies but €18 is about average. In most cases, ton or 1000Kg lots are a bit cheaper, and there are some special offers to be had occasionally.

Calco Mix is €14 a 40Kg bag

Hi-Lite Glovoids is €15.98 for the equivalent 40Kg

CosyGlo is €18 a 40Kg bag



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Fuel Poverty in Ireland could reach 50% in 5 years

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Oh God!

A recent conference run by the Irish charity "Energy Action" heard some shocking statistics on fuel poverty in Ireland. Among the frightening facts discussed were:

(1) Ireland has a higher winter mortality rate than even Norway which is much colder.
(2) Winter excess deaths in Ireland stand at 650.
(3) It is possible that Ireland could have a fuel poverty level of 50% in five years time.
(4) During the winter there are some 1,600 extra hospital admissions taking up 153,028 extra bed days, and costing an extra €61 million.
 
Death by Taxation?

Am I surprised - no not at all - I have held this belief for some time now, and also believe that the recent hikes in taxation on essential heating fuels had added greatly to the problem. What price tax revenue?

With heating oil some 20 - 25+% more expensive than in Northern Ireland due mainly to the Republic's swingeing taxes, Ireland, once known as the "Island of Saints and Scholars", is rapidly becoming the "Island of Sufferings and Sorrows"

On coal and briquettes the government takes 13.5-% VAT.  Even on environmentally friendly carbon neutral wood fuels there is 13.50% VAT effectively countering any spending on promoting sustainability - why would you use wood briquettes etc. when coal is cheaper. Take the VAT off carbon neutral fuels and give them a chance.


The Poor, as always, must pay for the excesses of the Rich

It is a clear cut and dried case where the poor, the weak, and the vulnerable must pay for the greed and excesses of the bankers, the speculators, and the rich. The price in many cases is death.


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A Lesson in Wood Briquettes & Eco Logs

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Wood Briquettes

Good Briquettes
This post has been updated 1st January 2016 

"Know your Briquettes", so let us begin with the basics.  Extruded Wood Briquettes or Eco Logs as they are sometimes called come in THREE distinct types:

1.  Those which are solid but break easily into sections and look a bit like compressed sawdust,
2.  Those which are solid and so hard you could hardly drive a nail into them, and
3.  Those with holes through the middle.

All types are classified as briquettes but are made using fundamentally different techniques. Each type looks and feels quite different. Each type stores and handles differently. Each type displays very different burning characteristics. 

Solid Briquettes and Easily Breakable types:

The solid log types are made using a ram or piston type press which simply hammers or squashes layers of sawdust together under great pressure. These briquettes are much lighter in colour because the temperature is not as great in the process. They also break more easily and have a much looser looking texture. When they burn they expand up to twice or more their length in the fire and become spongy in texture. They are not a very good type of briquette. See previous several blog posts for specifics.

Above is a piston or ram type of briquette press. This type usually has a big flywheel to drive the ram. It uses uses less energy and takes a lot less maintenance. The put through of piston press machines is also much greater than screw presses, in fact about 6 times more output per hour on average.

Personally I do not like the hammer mill solid type of wood briquette because of the way it burned. As I have said and show in previous posts, they expand to over twice their length in a fire. They soften out as they expand and therefore burn more like wood shavings. Solid briquettes give the same heat output but the burn characteristics are what I find unsatisfactory.

Briquettes with a Hole.

The briquettes with a hole through the centre are extruded from a screw press using huge pressure. The enormous pressure generates a great deal of heat and further heat is added by electric heaters to closely fuse the particles together. It also makes the briquette have a dark and partially carbonised burned look to it. This glossy carbonised exterior helps protect the briquette from moisture.

The hole is nothing more than the byproduct of the screw thread passing through the middle. This type is usually compressed to just 10% or less of the original mass. The resultant briquette is very dense.

Above is a screw type press. Note the extrusion tube in which is the compression screw, and around which are the electrical heaters in yellow.

 
Screw presses wear out the compression screws quite often and they use a good deal more electrical energy. They also are slower and produce much less per hour than the piston or ram types. However, the screw type press produced a much superior type of briquette. These briquettes are naturally going to be a bit more expensive to produce.

The screw pressed and heat treated type of briquette is very dense. it has a carbonised outside which makes it easy to ignite and also helps it to resist moisture while in storage. It does not expand at all in the fire. It burns for up to twice as long as the ram pressed type, and can be burned along with other fuels including coal. I find that it is possible to get a much longer burn time overall with these briquettes. It still has negative aspects, the main one is IT BURNS TOO QUICKLY. It is therefore not great for long time burning - such as over night.


SOLID FUSED WOOD BRIQUETTES

There is another type of solid wood briquette which is not easily available in Ireland, although I have seen it advertised in the UK. This type is a fused wood briquette. It looks a bit like the solid hammer mill type BUT try breaking one and you will find just how hard it is. The very high pressure at which this type is manufactured causes it to heat and the wood to FUSE into a solid mass.

Because this type is so solid and hard it burns like limps of coal and can burn right through the night. I have received information from Hermanson's in the USA who manufacture this type. Hermanson's have developed their own process and machinery.

This is a very desirable type of wood briquette and the only one that I would have any real interest in using. I have tried the other types and am not impressed.

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In Ireland "beatings will continue until morale improves"

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Is Ireland Currently

Sustainable?

The Government in seemingly blind and hasty desperation has imposed, among other hardships, an indiscriminate and inequitable poll tax - otherwise called a household charge on every home in Ireland. This was done without the slightest effort to determine ability to pay.  Is it not realised that historically poll taxes have caused civil unrest and even wars?

Under the current "Irish" arrangements a person living in poverty, lacking sufficient heat, food or medical care, and perhaps living in a house needing serious maintenance, still has to pay the same tax / charge as the guy earning €300,000+, owning three homes, 4 cars, two racehorses, and many foreign investments.

IMHO, not only has this tax been imposed without due consideration, but at the same time those in the parliament and in the Irish senate are themselves gouging the system by grabbing and vociferously holding onto  ignoble, immoral, and indefensible levels of expenses and salaries.

Beatings will continue until morale improves

Unfortunately, it would appear that the Irish government has taken a most belligerent approach to imposing this inequitable tax. "PAY UP OR ELSE" is the essence of the war cry . "WE WILL GET YOU  - FINE YOU  - MAKE YOU PAY - TAKE IT FROM YOUR WAGES" .  "BEATINGS WILL CONTINUE UNTIL MORALE IMPROVES"

This is truly an unsustainable situation.

It would appear that the Irish people are responding to this approach by not responding, as less than 3% have registered for the household charge, Additionally, there are growing protests all over the country.

As I have already said.

Not until the hard-pressed and poorer half of the (Irish) population see the well-off paying their fair share. Not until the government have the gonads to take on a bloated and inefficient public service sector. Not until the Irish Parliament take a moral lead by reducing their own huge salaries and pensions by a substantial amount, like 50%, and not until they additionally limit their obscene and obese expenses to say €10,000 of ticketed items a year, will there be any appetite in the population for the hair-shirt taxation now being placed on rich and poor alike.

(The current political situation) It is a déja vu situation echoing  past times when Charlie Haughy, addressing the nation, told the Irish people to tighten their belts, while, at the very same time, he was buying a bunch of Charvet shirts in Paris for £16,000 or what amounted to more than two years income for most.

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Wood Briquettes Eco Logs 4th Look

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A 4th Look at Wood Fuels
this time

Compressed Heat Treated Briquettes

So I have come to take a closer look at the burn characteristics of the 3rd type of wood briquette I have tried. It is the hexagonal heat-treated dark type of wood briquette. Some of this type have a hole through the centre and other types don't have this feature. I would think the type without the hole would burn a bit slower and this I would prefer.

NOTE: I have subsequently written a blog post about this extruded heat treated briquette and how it differs from the compressed type. The good type of  briquettes will have a hole in the center - this is due to the way they are manufactured. This is the only type of wood briquette I personally would have any serious interest in using.

Again, I have taken a 14cm piece and placed it on a hot fire. After 30 minutes there is no expansion at all, in fact there is a slight shrinkage in length.

I let the time slip up a bit so it was 1 hour and 10 minutes by the time I got back to check how much the Hex Shaped briquette had burned. Pictures speak louder than words - it has been burning for 10 minutes longer than the other two experiments - and it still has a way to go. This briquette IMHO has way more going for it.

Even Longer Burning

1 Hour and 35 Minutes into the burn - - and as you can see, this little briquette is still going strong. That is a full 35 minutes after the other two types I have tested have burned out. There is no doubt in my mind which type of wood briquette I would prefer to use.

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Wood Briquettes Eco Logs 3rd look

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A 3rd Look

at Wood Briquettes

I decided to take a closer look at the round type of pale coloured compressed wood briquette in order to give a fair comparison between types.

As you can see in the above photos, I have again taken a roughly 14cm piece of the eco log and placed it on a hot fire. After 30 minutes approximately, it has expanded to almost 29cm.

 

The picture above show the burn 30 minutes in - still plenty of burn left but it has swelled up into a loose mass which, as I said, is just short of 29cm.

So how did I measure in the fire? I used a large 9" stainless steel dividers caliper to take the measure and then read it on a rule..

The characteristics are very similar to the square type one. It expands just a bit more but the burn is very similar. I have just checked the burn and some 45 minutes of burning leaves a very soft mass still giving heat but not for too long more I think. 55 minutes and it has just about gone completely.

Little to choose between the two pale briquettes

There is very little to choose between these two type of eco log briquette. The round one expands just a bit more to just over twice its original length, while the squarer type expands a little less and hold its texture just a tad better. Ultimately, I feel that the differences are insignificant. I still do not like the burning characteristics of this type of eco log.

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Wood Briquettes Eco Logs

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A 2nd Look
at some characteristics of
Wood Briquettes

I has been suggested to me that my initial assessment of some wood products was not scientific and was inaccurate. I do not aim to be a scientific authority, or indeed any sort of authority on the subjects I write about. The opinions are my honest impressions, backed up in any way I can with some bit of science.

So today I take a closer look at one type of compressed wood briquette log - it has a somewhat square profile and is the pale type of briquette.

I have taken a 14cm piece of the briquette and placed it on a hot fire. After some 15 minutes, I measured it and it had expanded to about 20cm. After a period of some 30 minutes it had expanded in length to 26cm.

In expanding, it had become segmented and very soft and flaky. When the door was opened and the air got to it, it burned really quickly.

 You can see here where the mass breaks up and starts to get spongy

 After approximately 1 hour it has just about gone

I appreciate I am not able to be highly scientific, but you will see from my simple experiment that the paler type of wood briquette log rapidly expands to, in this case almost twice its original length, some other types expand even more.

When the mass expands, it allows more oxygen to mix through the fuel and speed up the combustion. This is not perhaps a good feature in fuel for stoves etc. 

I have no argument with the total heat output or other factors of this type of fuel which may prove highly satisfactory in many situations. However, when the mass expands 2x times or more and becomes porous and spongy, the burn rate is going to change a great deal and it will be difficult or impossible to get extended burn times. Expanding mass will also cause the fuel to push out against the glass of a stove or over the edge of a grate.

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Eco Logs Wood Briquettes

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A First Assessment 

of some

Wood Based Solid Fuels

I have recently been trying out some alternatives to coals and peat in my stove and closed fireplace. In the photograph above you can see three types of compressed wood fuels that I have tried.

The smaller and darker top two pieces are highly compressed and heat treated wood briquettes. I find that these burn well, smell great and give out a good deal of heat. They burn without disintegrating or turning into a soft mass, and you can get heat over a reasonably extended time. I like this type of "cooked" dark, and almost burned type of briquette.

The bottom row shows two similar types of compressed wood logs, also called eco-logs, or briquettes. The round type tends to swell and expand some more than the square type does. Both of these types I find not as satisfactory as the highly cpmpresses dark type for the following reasons.

(1) They swell up and extend up to more than twice the initial length when placed on the fire. They can thus fall out of the grate, or in a stove, can push over to come into contact with the glass.
(2) They go into a soft sawdust type loose mass and thus create poor burning conditions.
(3) They burn away much too quickly, I guess because the mass is so loose, and thus have no hope of long burning i.e over night.

I will definitely not be buying any more of either of these pale and loose textured wood fuels.

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