Hot Water Boiler Economizer PreHeater | Energy Efficiency
This is a hot water economizer and is a big preheater for domestic hot water use. This boiler plant serves a large community for heating and domestic hot water use. Domestic hot water is used for showers, washing dishes, laundry, ect, ect, ect…. The cold water supply from the city is routed through the economizer to be pre-heated before it goes through a heat exchanger and then the hot water storage tank. This system saves money because it uses the exhaust gases from the boiler to pre-heat the city water supply which is normally 50 degrees Fahrenheit. The exhaust gases from the boiler would otherwise be vented to the atmosphere and would be considered wasted heat. (more…)
Hot Water Heaters – Domestic hot water heaters make our lives much more comfortable than ever before. Hot water heaters give us hot water for washing our hands, showering, washing dishes and other uses that would otherwise be uncomfortable without a hot water heater. When considering hot water heaters beyond the cost of the water things to consider are the size of the hot water heater and the type of fuel it will use to heat the water. Efficiency plays a key role in the decision also and while the more efficient models are more costly to purchase paying the higher cost now will save a lot of money down the road in energy savings. Additionally, with all the tax incentives and utility incentives buying the more efficiency model may cost less than the less efficient water heaters. Before looking for a water heater it might be a good idea to check with your local utilities to find out what kind of incentives are available for buying higher efficient water heaters. After checking with the local utilities then you can go out looking for the best water heater to suit you and the purpose you need the water heater for. Tankless water heaters can also be a consideration although these should be sized by a professional so you don’t get too small of a tankless water heater (not enough hot water) or too large of a tankless water heater (inefficient). (more…)
Heat Exchanger & Domestic Hot Water Storage Tank – In the front is a commercial heat exchanger. Behind the commercial heat exchanger is a domestic hot water storage tank.
The supply water from the city is directed through the heat exchanger where it is heated to a set point temperature. This is usually 120 to 130 degrees Fahrenheit. 180-degree water from the boilers run through tubes inside the heat exchanger while the cold water runs through the inside of the heat exchanger in separate channels outside the tubes where the hot boiler water is. The water is heated and then delivered to the community where it used for showers and washing dishes and other hot water uses. (more…)