Renewable energy systems designer/developer- outsourcing consultant

The first pages covers the history of the UK hot water heating system market followed by next generation of Multi Fuel Thermal Stores and Solar Central Heating/Hot Water Hybrid systems for domestic applications, followed by the sucess of the worlds first flat pack thermal stores up to 10,000 litres produced by Sirac in Sth Africa under the brand Thermocube and Thermotube (blown polyethylene tanks up to 1,600 litres



Hot water storage tanks explained in detail below.pdf
Comparing a Kingspan unvented with a Thermaltricity vented system 2016.pdf


What is soon to follow on from the success of heat pipe evacuated tube collectors, since the initial introduction of heat pipe collectors in 1994, is a NEW innovation within the heat pipe that stops the overheating of the hot water tank during hot summer months.

One of the major problems with heat pipe tube collectors, as with all other closed loop pressure water systems, is once the cylinder is up to temperature specified by the hot water cylinder manufacture (of around 65-70c for UNVENTED cylinders) is that the solar pump stops working, thus increasing the hot water and pressure expansion build up within the closed loop system through an expansion vessel and pressure release valves.

Having proven over the past 14 yrs that a open vented Thermal Store is the ONLY hot water storage system option that delivers both hot water for washing as well as support space heating. A new heat pipe innovation is on its way in 2019 that allows a greater use of solar thermal for winter space heating energy savings (Heat pipe evacuated tubes only)

The NEW heat pipe innovation allows an open vented Thermal Store of say 250 litres to be increased from my current 44 tubes to 60 tubes or higher if you have the roof space.

By increasing the collector area, you produce more heated water during the 5-6 months of winter in the UK, to be circulated through steel radiators or underfloor heating from November to the end of May.

The NEW heat pipe includes a temperature restriction of 80c, which means when there is no more demand for heating, your solar system can provide up to 99% of your hot water in summer, without the overheating issue for open vented systems

A solution to the overheating of a multi fuel thermal store.pdf

For comercial thermal stores, go to this link <<<http://www.thermocube.biz/>> which is my partners business in Sth Africa, who invested in the materials required to produce the flat pack hot water tank concept, which is road freighted flat pack and assembled on site.

In 2017, Sirac introduced the pre assembled Thermotube, in 1,000 to 1,600 litre volumes, which work exactly the same as the flat pack kits, but produced from blown polyethylene.


A short history about the flat pack tank/thermal store concept

The concept behind the made to measure, made to order hot water tank, started in the USA with one of my importers in Eureka, California in 2006. But after the banking crises in 2008/9, the business was almost destroyed, but the owner managed to keep hold of his store and workshop, where the tanks were made.

My re visit to his store in 2013, was to see how together we could re start the solar water heating business.

On seeing a tank being assembled from stock material parts, I came up with the idea, "WHY ASSEMBLE THE TANKS IN THIS WORKSHOP, WHEN THE SHIPPING COSTS SENT FLAT PACK WOULD REDUCE THE PRICE TO THE BUYERS"

We spent weeks working on a new spread sheet, changing some USA made materials to made in China materials and working out the material costs per tank size.

In 2014, my American partner decided to close down the solar water heating and tank business to focus on solar PV off grid systems.

I took it upon myself to market the concept through the German printed Sun and Wind trade magazine (see below) but zero interest.

It was by pure accident that the owner of Sirac Sth Africa, responded to one of our e-mails sent out to hundreds of solar related companies promoting our solar speedflex insulated stainless steel coils of pipe.
The common ground we had together at that time, was I was also importing Sirac heat pumps from China pre 2009, which he only took on after 2010, but commercial heat pumps.

After an exchange of e-mails and then arranging to meet in China, the owner explained to me about his problems with local made hot water tanks, which I had also experienced having imported some Fiberglas tanks from Sth Africa back in 2004.

It was then I shared all the information about the flat pack tanks, we had developed in the USA, which would need some investment before it was possible to sell this type of tank.

The owner secured the investment and used some of the money to set up the worlds first flat pack thermal store assembly.

Over the past 4 years, Sirac has delivered and assembled over 500 thermal store systems heated by Sirac heat pumps from China, and recently also heated by solar thermal collectors.

In 2019, we are now in early talks about adding my solar thermal cooling exchanger to the business, which would set us apart from the rest of the solar PV and thermal energy industry worldwide.

We are also now seeking to licence the concept to other companies outside of Africa, with Europe as our first market to complete an agreement.

The licence holder, would also be offered the Thermaltricity solar thermal cooling exchanger, which converts a PV panel to a PVT panel. Information about PVT can be found in one of our other pages



SWE-06-07_08_Hawkins_Thermaltricity.pdf