A reduction of 2-8 dB(A) in the engine’s noise level and 3-8% in fuel, at a 50-75% load
The interest in constantly searching for improvements to get increasingly optimised and quieter generator sets never ends. Inmesol introduces the Visco Fan series for VOLVO engines with 200-595KVA PRP (50Hz) and 225-640 PRP (60Hz) powers to its range of products.
The Visco fan is a hydraulic variable coupling with electrical control that acts on the engine’s refrigeration system.
This device is installed between the fan and the genset’s engine driving shaft.
In a conventional mechanical refrigeration system without Visco fan, fan speed remains constant under any circumstance: Radiator’s high or low temperature, engine’s higher or lower load rate. Thus, the fan is always consuming the same amount of power from the engine, thus fuel consumption and noise emission remain constant.
When the system has Visco fan installed, the CIU engine control unit adapts fan speed to engine temperature and work load using Visco fan. 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 shown in the following chart:
What happens with noise or sound emissions?
The very functioning of a fan generates a sound emission that 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.
Reasons for using Visco Fan:
- Savings in fuel: 3 to 8% at a 50-75% load. Higher savings with a lower load.
- The reduction in fan noise levels may reach up to 2 dB(A)
What genset models support this device?
All models with VOLVO engines ranging from 200kVA PRP up to 595kVA PRP
Applications where its use is cost-effective and results in a short-term payoff
The Visco Fan is ideal for applications where gensets work long hours at 80% of their load, such as the rental, construction or events sectors, among others.