The engine water pump can be used to circulate water through the remote radiator providing that the vertical distance from the engine water pump does not exceed the engine manufacturer’s recommendations. The allowable static head may range from
When either horizontal or vertical distances exceed the above limitations, a hot well tank or heat exchanger and auxiliary circulating pump as shown in Figure
Heated water is forced by the engine pump into the “hot” side and then is drawn off by the auxiliary pump and forced into the radiator. After circulating through the radiator, coolant flows back to the cold side of the well where it is removed by the engine water pump. Head pressures are thus isolated from the engine. Pressure can also be isolated by installing a heat exchanger between the engine and remote radiator.
With the radiator at a remote location, it is easily overlooked each time the generator is serviced. For this reason, low water alarms, or automatic
Shutoff valves should be located between the engine and cooling system to allow for isolation of both systems. This will eliminate the need to drain the entire system during service.
To determine radiator size and air requirements check the Specification Sheet for your model. The amount of air required to ventilate the generator set room or enclosure determines the size of the air inlet and
4.9 City Water Cooling
These systems utilizes city water and heat exchangers for cooling and are similar to remote radiator systems in
that they require less cooling air than
The heat exchanger the effects of city water (lime deposits, corrosion) to one side of a heat exchanger which is relatively easy to clean or replace, while engine coolant circulates in a closed system similar to a radiator system.
It allows better control of engine temperature, permits the use of antifreeze and coolant conditioners, and is suited to the use of an engine block heater as a starting aid.
Water inlet and outlet connections are mounted on the generator set skid and isolated from engine vibration by flexible sections. If the generator set is vibration- mounted to the skid and the skid is bolted directly to the mounting base, no additional flexible sections are needed between connection points on the skid and city water lines. If the generator set skid is mounted to the base with vibration isolators, flexible sections must be used between connection points on the skid and city water lines.
A solenoid valve mounted at the inlet connection point automatically opens upon
4.10 Cooling Tower
In warm, dry climates, a cooling tower may be a suitable source of generator set cooling water. A typical system is shown in Figure
18 Section 4 Air Requirements |