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10 Ways to Optimize a Steam Heating System

http://maxi-therm.net Maxi-Therm offer complete steam solutions for building heat, domestic hot water and clean steam generator. The main technology is the use of a vertical flooded steam heat exchanger which allows to make energy and maintenance savings on the steam usage. <br><br>Steam heat exchanger manufacturer mainly for Hopsitals, Universities, Food industries, Pharmaceuticals. Chemicals and Plup & Paper Mills.

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10 Ways to Optimize a Steam Heating System

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  1. 10 Ways to Optimize a Steam Heating System A steam heating system can be optimized in multiple ways. Starting at the boiler room and then on the steam network. All this depend what are the usage for steam. It will be easier to optimize a steam process for building heat, domestic hot water and humidification than a pulp and paper mill process. Of course the energy saving vs payback depends on how much you pay for your steam based on your cost of fuel and hours of operation. And normally the experts give a steam system efficiency of less than 70%. This is mainly due to all the flash lost coming from different condensate receiver tank on the steam heat exchanger network, the blowdown on the boiler and the vent from the main receiver tank and the deaerator. Here is a list of 7 projects to do in a boiler room - Install a vent condenser on the deaerator and the main receiver condensate tank to preheat fresh soft water for the boiler, the domestic hot water or hot water for process. Approximate payback 1 to 3 years. - Use a heat recovery system on the steam boiler blowdown to preheat fresh soft water for the boiler, the domestic hot water or hot water for process. Approximate payback 2 to 4 years. - Using a stack economizer on the chimney to preheat water from the deaerator (or main receiver tank if you don’t have a deaerator) before feeding thee boiler. So let’s say you are coming out of the deaerator at 227°F, after going true the stack economizer you will feed the boiler around 250°F. Approximate payback 4 to 7 years. - Install a condensing stack economizer over the previous one to preheat domestic hot water or hot water for process. In order to have a decent payback you need a hot water demand of at least 12 hours a day. Approximate payback 4 to 7 years - Put a high performance burner with a high turndown. This can bring you energy savings up to 15% depending of you actual burner. Approximate payback 4 to7 years. - Or install a micro-modulation control system on your existing burner. Depending on your actual burner, if it’s in good condition or not, you might just replace the linkage per dedicate actuators on the fuel valve and the air damper link to a burner controller. The payback will be around 3 to 5 years. - Instead of the heat recovery on the blowdown you can also think using a reverse osmosis system. This will allow you to reduce the blowdown at

  2. 1% and lower, plus it will eliminate the use of amines to protect the condensate {piping lines}. Including the maintenance the payback will be around 5 to 8 years. 3 project to implement on your steam heating system - Replace your inverted bucket trap on drip legs for thermostatic or bi- metallic steam trap. Those inverted bucket trap don’t close tight, they are always leaking no matter who is the manufacturer and especially on high pressure steam lines. - Over time replace the traditional heat exchangers by vertical flooded heat exchangers that extract more heat in each pound of steam. And by using does vertical steam heat exchangers you don’t need condensate return pump any more so no flash loss. You don’t even need safety valve on steam anymore. Very low maintenance. And will also provide you a turndown of 50 to 1. - Use clean steam generator for humidification and sterilization or any other steam injection process, for two reasons: 1) you will eliminate the debate about using chemicals in the steam or not, 2) you will recuperate 100% of the steam (condensate) coming from your boiler which means less make up water which means less chemicals and less blow downs. - Those 3 projects will have a long payback on a replacement job. But if you plan to repair or replace an old system or an old steam trap, you should definitely look at the difference in the cost of implementing one of those 3 recommendations. By doing slowly all those projects, over years you will have a full close steam heating system with an efficiency higher than 90% with a descent turndown on the burner, better than most of hot water boiler. On top of that, depending of your choice of manufacturer, you will reduce your maintenance costs, especially if you implement the flooded vertical steam heat exchanger for building heat and domestic hot water process because you eliminate the use of pressure reducing valve, safety valve to the roof, dedicate condensate return pump and up to 10 MMBTU process application you just need a ½ inch control valve on the condensate. The leader in this type of design is Maxi-Therm base in Montreal Canada.

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