Supercharge Your Tankless Water Heater - Get Fast Hot Water and Be Green!

!±8± Supercharge Your Tankless Water Heater - Get Fast Hot Water and Be Green!

While it's true that tankless water heaters save energy and can provide an endless supply of hot water, it's also true that tankless units take longer to get the hot water to the fixtures. Since a tankless heater needs to heat the water before it can deliver hot water to you, you have to wait longer. The only way to get the hot water of course is to run the faucet. So while you run the faucet and wait, you are dumping gallon after gallon of pure clean water down the drain. Water that required energy for pumping and treating it. Pumping and treating the water uses energy which in turn means green house gasses being released into the atmosphere.

The heater can be pictured as a long piece of pipe coiled up and placed over a fire. As the water flows through the pipe it gets hotter. In order to reach full temperature it has to stay in the fire for a certain period of time. It will take longer if the water starts out colder. If you speed up the flow of water it will get cooler, unless you add more fire. With the old storage heaters the tank full of hot water is ready to go the moment the faucet is opened so you get your hot water faster.

With tank type heaters what has been done in the past to both speed up the delivery of hot water and eliminate running the water down the drain while you wait is to create a loop in the hot side of the plumbing so you can pump the hot water around the loop, keeping the pipe full of hot water. That way when you turn on the faucet you get instant hot water every time whenever you want it. It works great with a tank type heater except for the fact that it uses a whole lot of energy keeping the piping warm.

But you can't do that with the tankless unit because tankless heaters turn on when they detect water flowing through them. Usually it takes ½ gallon per minute of flow or more to activate most tankless heaters. Most circulating systems don't produce that much flow. If they did, then the water heater would be on all of the time. Using a standard circulating system with a tankless heater will void the warranty in almost every case anyway.

There is another type of hot water delivery system called a demand system that will work just fine with tankless water heaters. The way it works is a small pump is installed under the sink furthest from the water heater. When you want hot water you press a button and the demand system pumps the water at high speed from the water heater to the fixture. The system has a temperature sensor monitoring the temperature of the water, and when it senses an increase in temperature it shuts off the pump. This prevents hot water from entering the cold water lines.

Since the pump only runs for a few seconds at a time it uses very little energy. Typically it uses less than .00 per year in electricity. It doesn't use any more heat energy than a standard plumbing system. It saves 100% of the water normally run down the drain waiting for the hot to arrive.

Demand systems are suitable for use with tankless water heaters since the pump only runs for a short time, and will not void the warranty of the water heater. Not all demand systems have strong enough pumps to run tankless water heaters though, so you should check with the manufacturer before you make the purchase.

Metlund makes a demand system they call a D'mand system. They have several models, and I think the largest model has a strong enough pump to use with a tankless heater. Metlund's d'mand pumps range from 1/40 horsepower for the smallest to 1/8 horsepower for the biggest. Chilipepper makes a demand system, and they only make one model, the CP6000. The CP6000 has the most powerful pump of any system on the market, (approximately 1/3 horsepower) and will work with any tankless water heater.

Another reason for using a more powerful pump is that the more power the pump has the faster the hot water will arrive at the fixture.

By combining your energy efficient tankless water heater with a hot water demand system you get the best of both worlds...you are energy efficient and you conserve water. It's a great feeling to know that you are doing your part to protect the environment and conserve our natural resources every time you use hot water.

Supercharge Your Tankless Water Heater - Get Fast Hot Water and Be Green!

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Methods of Improving Boiler Efficiency

!±8± Methods of Improving Boiler Efficiency

With the rising cost of fuel prices, industries that use steam boilers for heating or power generation are hard pressed to operate at peak efficiencies.

While steam consumption, leakages, and other heat transmission losses can contribute to the overall energy bill, this article focuses on the heart of the steam generator - the boiler.

Controlling the boiler is of utmost importance in any steam generation energy saving program. Below are some ways to improve boiler efficiencies:Reducing excess air Installing economizer Reducing scale and deposits Reducing blow down Recovering waste heat from blow down Stopping dynamic operation Reducing boiler pressure Operating at peak efficiency Preheating combustion air Switching from steam to air atomization Switching to lower cost fuel
Reducing Excess Air

By far the most common reason for energy inefficiencies in a boiler can be attributed to the use of excess air during combustion at the burners. When there is more air than is required for combustion, the extra air becomes heated up and is finally discharged out to the atmosphere. However, there are reasons for putting in some extra air for combustion - to compensate for imperfect burner fuel-air mixing conditions, air density changes, control system "slop", burner maintenance, fuel composition and viscosity variation, and imperfect atomizing steam or air controls for burners.

Adjusting the fuel-air ratio for combustion can be quite tricky. If the fuel is too much as compared to the air, incomplete combustion occurs. This will give rise to carbon soot deposits inside the combustion chamber or even over the boiler tubes.

The consequences of having soot deposits over the heat transfer surfaces and the potential of having explosive flue gases inside the boiler are much worst than losing a slight amount of energy through the exhaust stack. Therefore, many boiler operators choose to adjust their burners to be slightly on excess air.

Installing Economizer

This is only appropriate if there are insufficient heat transfer surfaces in the boiler. The economizer tubes may contain either circulating boiler water or circulating feed water. Because the temperature of the exhaust gases can be quite high, the economizer tubes may be fitted with safety valves to avoid over-pressure damage. Also temperature control of feed water is required to prevent pump airlock. To avoid corrosion, careful design is needed to ensure that the exhaust flue gas temperature does not drop below the dew point.

Reducing Scale and Deposits

For any boiler operation, this is a must. The safety of the boiler is at stake. Any scale or deposits will lead to reduced heat transfer that will eventually lead to overheating, reduction of mechanical strength of the steel and finally to bursting.

This should already be in the normal daily procedure of boiler operation.

Reducing Blow down

Blow down of boiler water is discharging hot water into the drains. However, blow down is necessary to maintain the boiler water concentration of dissolved solids that are necessary for conditioning the boiler water. The dissolved solids are necessary for preventing boiler corrosion and scaling.

As steam is generated from the evaporation of water, the remaining water in the boiler becomes more and more concentrated. This must be drained away during blow down.

The challenge is to control the draining to the minimum.

Recovering Waste Heat from Blow down

Since it is necessary to blow down to control the total dissolved solids in the boiler water, methods can be adopted to recover back some of the heat from the drained hot water.

Blow down tanks, heat exchanger tubes and pumping arrangements can be fabricated to recover some of the heat back into the boiler.

Stopping Dynamic Operation

Whenever a boiler starts or stops, a few minutes are spent running the forced draft fan for purging the combustion chamber of unburnt gases. This is a necessary step for the safe operation of a boiler.

During this time the heat from the boiler water in the shell or tubes will be lost to the purging air.

To avoid this type of losses, it is better to maintain a steady firing condition in the boilers.

Reducing Boiler Pressure

By reducing the boiler pressure, some of the heat losses through leakages or transmission may be reduced slightly. However there can be problems with the boiler with reduced pressure. The boiler circulation may be upset and the steam lines may have insufficient capacity and flow to transport the low pressure steam.

Operating at Peak Efficiency

When operating two or more boilers, improved efficiency can sometimes be obtained by unequal sharing of the load so that the combined load operates at peak efficiency.

Preheating Combustion Air

Any heat loss from the skin of the boiler to the boiler room can be utilized back for combustion. By preheating the intake air the combustion in the furnace becomes more efficient.

Switching from Steam to Air Atomization

For burners with steam atomization, switching to air atomization will naturally result in less steam consumption overall and better boiler efficiencies. This is only applicable for heavy fuel oil burners.

Switching to Lower Cost Fuel

When comparing natural gas and fuel oil, if the cost is the same or more per BTU delivered, switch over to fuel oil.

The reason for this is that in the combustion process, hydrogen combines with oxygen to form water. The latent heat of vaporization is lost when water vapor leaves the boiler stack.

Fuels like natural gas with higher hydrogen to carbon ratio will lose this heat more than those with lower hydrogen-carbon ratio like fuel oil.

However one must also recognize that there will be increased maintenance, operating costs and greater need for more excess air in order to achieve complete combustion for fuel oil. In addition, soot deposits and incomplete combustion might also affect the overall costs.

Some of the ways mentioned above may not be feasible at all for your plant. Each of them may result in only a few percentage points of boiler efficiency improvement. However, if carried out carefully and with the proper tools and instruments, they do add up to huge savings.

Methods of Improving Boiler Efficiency

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Hot Water Therapy Pump (Standard Package)

!±8± Hot Water Therapy Pump (Standard Package)

Brand : PMT MEDICAL | Rate : | Price : $320.00
Post Date : Nov 18, 2011 17:04:39 | Usually ships in 1-2 business days

It is an automatic hot cold therapy system that delivers instant heat through patented wraps that go around your feet and hands to provide greater circulation and to reduce pain.Athletes with chronic pain or injuries may use heat therapy before exercise to increase the elasticity of joint connective tissues and to stimulate blood flow.The aqua-relief hot therapy system used for:back,knee,hip,foot and ankle,hand and wrist,shoulder,elbow,chest,breast,face and jaw,head,neck,feet,hands,and other specific applications.The warm water greatly improves circulation and provides relaxing therapy.The cold water therapy system can also be set to cold to relieve swelling and edema or to help aid in injury recovery. Cold therapy with ice is the best immediate treatment for acute injuries because it can reduce swelling and pain.Cold water therapy is also helpful in treating chronic pain.Disclaimer(Please Read):I am currently under the treatment of a physician who has prescribed this ARS or AIS product. I will read and completely follow all directions provided by the manufacturer, as well as instructions from my physician regarding treatment times, and protocols. I understand that I will assume all responsibility for the use/misuse of this product. I will contact my physician immediately in the case of any unusual reactions caused by the use of this unit. I understand that Healio Health/Helio Living is only a distributor and in no way assumes responsibility for any injury it may cause due to malfunction, misuse, inappropriate application, or other reason. By clicking "add to cart" you certify that the above statement(s) is/are true.**please note: cold therapy parts come in contact with water which may contain bacteria that can come in contact with skin/incisions. By regulations, we cannot accept returns on cold therapy units/parts unless there is a problem with their operation. In which case if the unit is still within its warranty period it will be replaced with a new one.

• The ARS Hot Water Therapy Pump system is adjustable from 32°F and 120°F allowing for a therapeutic advantage.
• Cold or Hot water is circulated all around the joint providing optimal 360º treatments.
• Can provide cool water for 6-8 hours or Hot with no-limits.
• Provides added compression to further reduce pain and inflammation. Compatibility with a variety of pads including the FREE Universal Therapy Pad.
• Hot Water Therapy Pump is covered by Medicare and many private insurances.

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