GENSETS


INMESOL & the Visco Fan series


This new technical development embraced by INMESOL means a reduction of 2-8 dB(A) in the noise level of a generator engine and 3-8% less fuel being used at a 50-75% load. Visco fan device is installed between the fan and the genset’s engine driving shaft. In a conventional mechanical refrigeration system - without Visco fan - the fan speed remains constant under any circumstance, for example a radiator’s high or low temperature, an engine’s higher or lower load rate, reports INMESOL.


T


he Visco fan is a hydraulic variable coupling with electrical control which acts on the engine’s refrigeration system.


% fuel


consumption fixed fan versus visco fan


1344 GE ‐ comparison fixed fan with Visco Fan


Some companies are dedicated ­ they constantly search for technical improvements for their customers ­


and the


mission to ensure generator sets are even quieter and better optimised never ends. INMESOL is certainly one of these companies: it has introduced the Visco Fan series for VOLVO engines with 200­595KVA PRP (50Hz) and 225­640 PRP (60Hz) powers to its range of products, reports UKPN.


Thus, the fan is always consuming the same amount of power from the engine - this means the fuel consumption and noise emissions remain constant. Once a system has Visco fan installed, the CIU engine control unit adapts the fan speed to engine temperature and work load by using the Visco fan’s advantages.


Therefore, if the engine is working below 80% of its nominal load, Visco adjusts the fan speed down, since not much cooling is required. The same thing happens when the work temperature is low.


This fan speed control translates into saving fuel, especially in load rates below 80%, as is shown in the chart on the immediate right.


So - what happens with noise or sound emissions?


As the fan functions it generates a sound emission which is proportional to its rotational speed and to the amount of air it moves. Thus, a fan working at lower revolutions and moving less air will considerably generate less noise. Using the Visco Fan means two things :


• Savings in fuel: 3% to 8% at a 50-75% load. There are even greater savings with a lower load.


• The reduction in fan noise levels may reach up to 2 dB(A)


What genset models support this device?


Visco Fan location diagram


38


All models with VOLVO engines ranging from 200kVA PRP up to 595kVA PRP. There are many pplications where use of the Vico Fan is cost-effective and results in a short- term payoff, reports INMESOL. The Visco Fan is ideal for applications where gensets work long hours at 80% of their load, such as in the rental, construction or events sectors, among others.


www.inmesol.com DECEMBER ‐ JANUARY 2017 UK POWER NEWS


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