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[EnergyPlus_Support] Re: Elevator and Escalator Energy Consumption and Heat Gain

For Dr. Li:
When I was at university in 2000, I was told by my electrical engineering mates that the old cell phones had given out as much as 10 W, but the new ones only about 3. That's no authority to go on, but if you new how long you cell phone's battery lasts and the rated mAhours, you could probably work out the average dossing of Watts of microwave radiation that you are exposed to. I don't think it can be much. I don't believe anything in the press or what they publish about alledged studies. But for now I'm risking the radiation.

Actually, a lot of the time we are confronted with modeling an existing state. The design is finished. The HVAC is in. I think what the user was after were existing numbers for energy consumption of a running elevator and working x-Ray machine. I don't have those at hand as I'm out of office this week. My judgement would say that elevators only move 20% of the time during "day hours", if that much, but I don't have any concreate numbers at hand. I would wager that standby energy is negligable. 

The right place to look is the manufacturer's data sheets for both x-Ray and elevator equipment. Jim pointed out kitchens. Wow, that would be perrilouse to forget. In my experience you're looking at about 450 W/m2 heat into the kitchen space. The rest goes out with the exaust air cooking hoods. This is about 40% of the total kitchen cooking heat. This can vary greatly. 15-40 %, as to how much goes into the space. Don't always trust kitchen planers. They're also trying to sell there equipment. The fatty air exhausts from kitchens are a sepperate air exhaust system. Note this relates to "hot kitchens"...not all kitchen space is hot kitchen space. The commertial kitchen often has walk in refridgeration units (again find a supplier to get the energy consumption). Also the dishwashing equipment. Modeling kitchens in a hurry is always painfull. Like people, a big unknown with big contribution to energy consumption.

Report back what you find so we can compare notes.

goodluck,

Jean  

 



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