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img width="371" src="">The installation of a fire pump system in a commercial or industrial property is a common occurrence. Using a fire pump system may allow a property to be developed where sufficient water pressure is not available1. Principle of operationDiesel engines require a fuel injection pump that delivers clean fuel to the engine, usually under gravity pressure. The fuel supply tank should be positioned so that the supply line connection to the engine is no lower than the height of the engine fuel delivery pump. The engine manufacturer's fuel pump hydrostatic head pressure limit must not be exceeded when the fuel in the tank is at its maximum.2. Fuel storageThere are two types of fuel tanks available in today's market: single-walled tanks and double-walled tanks. Although single wall tanks are initially cheaper, and overflow containment system must be provided for the full tank capacity. By design, double-walled tanks include an overflow containment device. https://fawde666.blogspot.com/2022/01/what-is-fire-pump-engine.html Their holding space must be monitored for leaks from the inner walls. The vents of the double-walled tank interstitial space must not be collectively piped with the vents of the tank's main compartment. The minimum capacity of a tank is determined by a simple formula: 1 gallon per rated horsepower plus 5% for the sump and 5% for expansion. While you should install at least the minimum size tank, it is not always a better idea to provide a tank that is too large. Diesel fuel has a shelf life and requires regular fuel quality testing. In a typical installation, a fire pump system will run for an average of 30 hours or less per year. The tank needs to be refilled as required to keep it close to full capacity at all times; however, it should not be less than two-thirds of full capacity. This ensures that the engine is always able to run at full capacity for the required duration. However, this may result in the fuel becoming stale.3. Exhaust systemDiesel engines require a large amount of air to be consumed and combustion gases to be processed in order to operate properly. The manufacturer's data sheet provides the required amount of combustion air. This amount of air must be freely available at the air filter inlet and not exceed 120 F. http://www.365blogger.com/show/20083.html Depending on the particular installation location, vents to the outside, fresh ducted air, or other means must be designed and installed.A suitable exhaust system is required to safely handle all combustion gases. It must be transported to a safe discharge location.The selection of the exhaust system needs to be completed by a calculation procedure to ensure that the backpressure of the diesel engine is in accordance with the list. The type of silencer chosen, the size and length of the pipes, the number and type of fittings, and other factors will all influence the minimum pipe size required. Exhaust system piping should be as short, insulated, and protected as possible to protect personnel and minimize heat transfer to the fire pump room or other surfaces. In many current installations, the exhaust system is not designed or assessed correctly. In most cases, the system works well, but the available power is affected, and damage occurs to the diesel engine. Cooling a running diesel engine is a key requirement. There are two ways to achieve this. As with generator sets, a large radiator with a fan to provide the required airflow for heat exchange is a perfectly acceptable method. In reality, however, this is rarely used. The amount of airflow and the ease of other processes usually make a choice a "no-brainer." The second method uses a heat exchanger with water from the discharge side of the fire pump to provide cooling. Because water absorbs heat much better than air, the relative size and ease of use of this method are utilized in most applications. In addition, with this method, the cooling water acts similarly to a casing relief valve. Therefore, NFPA 20 does not require the installation of a casing safety valve when using this method.Diesel engines are an excellent choice for fire pump systems; they are reliable and effective. Fuel supply and associated components, combustion air, exhaust, ventilation, operating environment, engine cooling - all of these need to be considered in the design and installation to provide a reliable and quality system.