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By pexpipeman, 12/16/2011

Radiant energy clearly exhibits great strength as an energy source. Daily lives of people are touched effectively by this energy form, be it while conversing on their cell phones or listening to radios. With the growing scope of its usage, and also the fact that it is derived from a source that is never going to be depleted, radiant heating energy is going to be the buzzword in energy generation in the very near future.
Many people till date might not be aware fully about this form of energy. Radiant heating can be deemed the only form that makes use of electromagnetic waves for energy generation, specifically it’s an energy form invisible to eyes.
Being such a commonly available form, therefore, the question that is asked is how radiant energy is used for solving our energy requirements at homes? For using it as a power source in our homes, we need to be armed with a special generator that could fully use the electromagnetic force and convert the same into energy. This generator is termed Radiant energy generator. Wind power, solar power or any other such waves within the atmosphere can be made use of by these generators for conversion into electricity.
Its main usage these days in our homes is restricted mostly to floor heating systems; however the huge potential that this form of energy possesses has been identified. There is continuous activity on the R & D front to find out how we can further use this energy form in our day-to-day usage. This is mainly driven due to two main factors – depletion of conventional energy sources and the vast availability of the source for this energy form, along with its cost-effective nature.
Radiant heating supply has already made certain impacts in our daily lives – we might not be fully aware of the extent. However, this is going to be the key energy source that has to be used for meeting all our future energy requirements.

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By pexpipeman, 11/19/2010

Radiant heating manifold

A simple description of a manifold is that it is a short pipe with side outlets; it is mainly used to distribute water to different sections of the house. Radiant heating is a process of heating the floor in countries where the temperature flows below zero degrees. It is done by passing hot water through pipes laid under the wooden floor. The water circulation system needs many components for the purpose. Radiant heating manifold is an inevitable device in the floor heating system.

Radiant heating manifold is a set consisting of two manifolds of which one is for the supply of hot water and the other is for the collection of the used water and to send it back to the boiler for re-heating. Every radiant heating manifold is tested properly so that it can withstand the pressure properly. It is pre-assembled and all the essential components like flow indicators and manual balancing valve, temperature gauges, ball valves to shut off or allow the flow of water and automatic air vent are found in each and every manifold. The mounting brackets are also present along with the set so that the manifold is fixed properly.

Radiant heating manifold can be used with many different types of installations. It can be used for staple up systems, baseboard radiators, in-floor and concrete slabs. It is equally effective with all the systems. The size of the manifold varies with the number of outlets it has. They come with as few as two to as many as twelve. The number of manifolds required can be calculated as the distance between the outlets is fixed. The maximum flow handling capacity of each outlet is 1.4 gallons per minute. The flow of hot water has to be fixed keeping the capacity of the outlet pipes in mind.

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By pexpipeman, 10/20/2010

Of shapes, sizes and design features of the PEX heat transfer plates depend on the intensity of heat transfer, reliability, staff, technology in production and labor for maintenance and repairs.

Corrugated plates are made by cold forming sheet metal, have increased stiffness compared to flat plates. On the wafer surface due to the presence of corrugation are slotted between plates winding channels of complex shape in which a relatively low flow rates is achieved by turbulence moving environments. In its position in the apparatus of the plate usually have different working fluid pressure on both sides, which can cause its deflection towards the lower pressure. To prevent such strains on each plate has vertical rows of remote (reference) projections, which create many points of mutual support between the plates. With full contact support protrusions between the plates of the assembled unit will hold a gap less than 4.5 mm.

Fluid after exiting the corner holes in between plates channel widening spreads on the input side, and then moves along the plate on a broad winding gap between them. During the washing liquid surface exposed to the turbulence which is caused by frequent rotations of the flow in the channels formed by corrugations.

Plates belonging to the same unit, also differ from each other constructively, which is due to their particular assignment and the relative position of the package. Multiples in the form of the plate at their destination in the apparatus is divided into three types: ordinary, boundary and limit.
Ordinary plate characterized by having a total number of holes in the corners, that is, each of which has four openings. Plates with these holes in the assembly apparatus form longitudinal collector channels. Ordinary plates make up the majority of plates in the apparatus. In each apparatus ordinary plate work in parallel in the same thermal and hydraulic conditions.

Boundary plates have an incomplete number of holes in the corners (at least four). Plates of this type are installed in locations where flow direction changes and, therefore, define the boundaries of packages.
End plates are placed at the ends of sections and directly adjacent to a fixed or pressure plate. End plates do not bear the heat load, as the working medium is washed on one side only.

In gasketed plate heat exchangers are used plate systems TL and VT. Brazed plate heat exchangers, as a special case of a fully collapsible, are collected based on laser-welded modules consisting of pairs of plates of TL.

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By pexpipeman, 08/22/2010

Virtually all applied today Aluminum pipes, including metal-pipe Henco, have the following characteristics:

Metal pipes for water supply

* Weight about 100-300, (1 meter of pipe)
* Diameter 16 – 63 mm.
* Pipe wall thickness – 2.3 mm.
* The thickness of the metal (aluminum) layer pipes – 0,3-0,4 mm.
* Maximum allowable working pressure of 10 bar.
* The highest operating temperature – 95 degrees and 110 degrees Celsius for short-term emergency
* Kislorodopronitsaemost pipes zero
* The service life of 35 years

Thus, the data quality features ensure the safety of long-term, which excludes the possibility to repair the metal pipes as often as, for example, pipes made of steel and cast iron.

Aluminum tubes are used in virtually any of the communications systems and livelihoods. It’s hot and cold water, heating, sewage systems, underfloor heating system, as well as compressed air, aggressive, technical, chemical, flammable and combustible liquids.

Metal pipes are often used as insulating material for electrical wiring. With such a wide range of applications, sales of metal pipes made everywhere.

The cost of metal pipes can vary significantly. For example, plastic pipes for water supply are more environmentally friendly and, accordingly, expensive inner layer.

The use of higher quality – food, plastic for the inside of the metal water pipes provides high quality supplied to them by water, with the exception entry of harmful emissions, its acquisition of foreign smell and taste. And in the pipes for heating systems, supply chemical and other liquids, use plain, non-food plastic. Hence the difference in prices for pipes for various purposes.

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By pexpipeman, 06/15/2010

One of the models among a variety of Takagi TK-3 tankless models is the Takagi TK-3-OS-NG model which is based on natural gas and is suitable for outside installations only. This model is manufactured keeping in mind different climatic conditions and requirements. It is best suited for warmer climates and does not require an additional venting which reduces the installation cost and makes the set up process much easier. It also consists of a built in freeze protection system.

The Takagi TK-3 natural gas model uses natural gas as its fuel and has a maximum BTU rating of 190,000 BTU/h with an energy saving efficiency up to 83% which has increased its demand. It consists of hot and cold water supply connections of 3/4” NPT and a gas connection of the same size. It weighs 40 lbs and includes electronic ignition. This water heater has a capacity of supplying water to 3 fixtures at 70F or larger inlet water temperature, or 2 fixtures at 40F inlet water temperature.

These features make it perfect for domestic hot water or radiant heating applications in small to medium size residential spaces consisting of two to three bathrooms. In comparison to a regular storage water tank heater, the installation of Takagi TK-3 model can save up to 45% of monthly gas bills of the owners making it an ultimate tankless water heater.

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By pexpipeman, 06/05/2010

Repair of major damage is done by so-called repair linings. Their distinguishing feature include the following: the presence of a welded zone, not only on the surface, adjacent to the tube, but also on the lateral shoulder. Thus, it is possible to repair damage from extended areas, restoring the old pipeline performance (in particular, the full working pressure), because this design makes it possible to weld together an arbitrarily large amount of overlap.

Installation is carried out in the application of welding technology of saddle parts. Preliminary pressing of repair clamps are using special clamping devices or devices of its own making.

If the damaged PEX pipe beyond the central zone of the cold saddle component or weld zone overlaps the location of damage, you must close the gap between the pipe and the surface of the saddle element of PEX material, such as using hand-held extruder.

Thus, polyethylene piping is well proven in the field of plumbing and gas supply. Despite the excellent performance of the PEX network, completely avoid the production of damage is impossible. Presented in this article possible repair of networks of PEX by means of mechanical fittings or parts of mortgages PEX radiant heating element offers a technically elegant and cost-effective alternative to traditionally used technology repair.

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By pexpipeman, 05/16/2010

The advantages of PEX and a wide range of polymer materials with different properties can be used in municipal systems.

In the PEX radiant heating systems of buildings are mainly used tubes of heat-resistant PEX for laying of pipelines (PEX fittings).

In the systems of hot and cold water units polymeric materials used for manufacturing stand-(toilet valves, float valves, mixers, etc.) and pipeline (Taco mixing valves: Taco 5002, Taco 5003, Taco 5004, heating valves, Taco zone valves: Taco 555-050RP, Taco 570, Taco 571, Taco 572, Taco 573 etc.), Taco Heat valves, internal internal and international networks, expansion tanks (Amtrol Extrol), water meters.

In the systems of wastewater (sewage) buildings polymers used for the manufacture of sanitary equipment (bath tubs, basins, sinks and toilet tanks, etc.), sanitation units, cabins, water trap (siphon), laying of internal and external sewerage, drainage networks.