How to Design Generator Room?

Starlight Generator
3 min readNov 4, 2019

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This article will guide you to learn how to design standby generator set room. If you are interested, please continue to read.

1. Plane layout of the machine room

When selecting the plane position of the machine room, it should be adjacent to the power distribution room as much as possible, because it is convenient for wiring, reducing the loss of materials and electric energy, and also convenient for management. If conditions permit, the machine room should be located on the first floor, which is convenient for ventilation, heat dissipation and smoke exhaustion. However, in high-rise buildings and large and medium-sized commercial buildings, the first floor is usually used as a commercial room, and the owners generally do not agree with this plan, so the machine room is often located in the basement. At this time, the following points should be noted in selecting the location of the equipment room:

(1) The machine room should have one side against the outer wall, so that the equipment ventilation, smoke exhaust is easier to deal with;

(2) It should be noted that the lifting, handling and maintenance of the unit is convenient. Generally, the parking garage access channel is used as the handling channel. However, if the passage is too small, the position of the lifting hole should be considered;

(3) Should avoid the damp place, do not set it under the regular water supply place such as the toilet, bathroom, pool, etc. or next door, to avoid toilet maintenance or floor seepage affecting the operation of the unit.

2. Ventilation and heat dissipation of the unit

Diesel engine, generator and exhaust pipe dissipate heat during operation, which increases the temperature of the machine room. If the temperature rises to a certain extent, it will affect the output of the generator. Therefore, measures must be taken to ensure the cooling of the unit. In the case of sufficient air intake and exhaust ventilation, the closed-type water circulation and air-cooled integral unit is generally used. Otherwise, the exhaust fan and the heat-dissipating pipe can be separated from the unit, and placed outdoor, and the outdoor heat dissipation pipe is connected with the diesel engine by a water pipe.

3. Smoke exhaust

When designing the smoke exhaust pipe system, the following points should be noted:

(1) The smoke exhaust system can reduce the back pressure as much as possible, because the increase of exhaust gas resistance will lead to the decrease of diesel engine output and the increase of temperature rise. Therefore, the shorter and straighter the exhaust pipe, the better.

(2) The exhaust pipe should be insulated to reduce scald and reduce thermal radiation to raise the temperature of the machine room.

(3) A muffler should be provided to reduce noise.

4. Noise processing

The selected units in general civil buildings are high-speed units. The noise is relatively large. In order to meet the requirements of environmental protection, the damping material should be set in the equipment room and the noise reduction measures should be taken. Since the actual situation of each project is very different, when selecting an emergency diesel generator set, in addition to meeting the standard requirement, it should be set according to the actual situation to achieve satisfactory results.

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Starlight Generator

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