Replacement of Electric Heater

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How about a magnet mount block heater?

How about a few of them?

At 200W each, you can assume there would be an electricity consumption savings over a 30KW heater even if you used 4 (4 - 2 each side of block)

You can also find heaters that are thermostatically controlled to turn off at a pre-set ambient temprature or operating temprature of the engine.

Disclaimer - I have been using a manual thermostat version of this heater on my home ge-set with success for 6 years.

If the heater has a thermostat, it will cycle on and off as needed to keep the engine warm enough. If the heater is actually energized only 1/3 of the time, you could use a 10kw heater instead, running all the time. Total energy used would be the same, but peak power would be less.

Where are you located?

Pls evaluate the possibility of using SOLAR WATER HEATER for this application.

I am sure you can save a lot of energy and there are some excellant options available.

It seems a shame to have to supply heat to keep the water jacket warm during standby when you are throwing away so much heat while the generator is running. Consider storing some of that waste heat in a hot water tank, then using it to keep the water jacket warm. You can determine the hot water requirement by converting the electric heater KWh usage to BTU's. The controls would be similar to what you have now - a thermostatically controlled circulating pump.

Check with the manufacturer. I feel 50 Deg C temp. is too high. You will have considerable savings if the set point of thermostat was adjusted to say 35deg C. You may try a gas or diesel fired heater in an auxiliary heat exchanger for still more economy.

For jacket cooling ?? You mean jacket heating so you can go straight to load from "cold" start up. Right?

The only way to escape parasitic consumption for heating is to harvest waste heat.

I don't know what type of facility this genset is serving. Are there any processes there that generate waste heat?

Naturally when the genset is running you will need to turn of the jacket heater. This could get complicated if performed with waste heat. The electrical heater is the simplest ergo most reliable way to achieve the required function.