A question that puzzles a group of experts: determining the load for transformers and diesel generators
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There is now a large garage with a construction area of over 120,000 square meters; it has 6 floors. The exhaust fan load for each floor is 133 KW, and the space is divided into 6 fire compartments, resulting in a total exhaust fan load of 6 x 133 KW. The load of the fire pump is 37 kW, that of the sprinkler pump is 45 kW, lighting requires 430 kW, elevators consume 2X22 kW, and the rolling shutters require 213 kW. There was a dispute with the client regarding the selection of the transformer and generator; I chose a 2000 kVA transformer and a 1200 kW generator, while the client wanted to reduce the capacity of both the transformer and the generator. 1. I choose 1.0 for the exhaust fans per floor, with a total demand coefficient of 0.8 ； Party A requests that the value be reduced further to 0.4, and the capacity of the transformer also needs to be decreased. The reason given is that there is little need for fire protection loads; lighting is the main use. Party A wants the capacity to be reduced to 800 kVA. The fire pump and sprinkler pumps need to have their wiring connected from another location, as this place does not meet the requirements for dual power supplies. However, the designer will not prepare drawings based on these requirements. How can I convince Party A? Urgent! Urgent! Urgent! !
Reply 1# amdintellive: From a design perspective, I agree with the original poster’s approach. When selecting a transformer, we need to take into account the total load as well as the economic efficiency of its operation. Therefore, as designers, we must stick to our own methods and follow the relevant standards in our designs.
Transformer 1000KVA, generator 800KW! Hehe, in the end it turned out like this d