Hi, Jean
You have mentioned many items, they are not really needed for energy saving of the building or operation.
EPlus manuals are very good reference books. Getting Started.PDF is sufficient as a text book. All the others are included as needed basis. There was a University Course PDF or PPT at the home page. Althugh it covered only the earlier version, the informatin provided are still useful.
People, lights, etc. need not be simulated. They only need to be consider for fresh air requirement and daylinght substitute application and simulated for confirmation of design. These numbers are needed for equipment sizing or window ventilation sizing. Annual simulation is required because the HVAC equipment COP is not constant and cannot be easily compared. Hence, the ASHRAE guide lines must be followed. Otherwise, it would be comparing apples with oragners.
Equipment heat should be designed to be vented to outside to reduce cooling or kept in to exist heating. EPlus has provided some of these options. Very few people uses them.
Comfort is not just 'clo' variation and activity changes for Winter and Summer, and skin evaporation. Chinese use clothes for body insulation in Winter and apply multilayer absorption cooling principle to keep cool.
Exposing more skin for cooling is not a good solution. I wore long sleeve shirt in Singapore. People asked me "don't you feel hot?" In fact, I feel cooler with long sleeve shirt. It is because the moisture is gever left on the skin, and the evaporation on the outside of the sleeve, kept the inside air cool.
You mentioned glass wall and ceilings for airport building. That is why an additional high shading is built over it. Subang airport in Malaysia has inverted mushroom above the terminal building.
There are many old buildings are more energy efficient than the new ones.
Bagage moving system: Why do you need to move the load continueously. Build it like a sorting system. The bags would drop down alphabetically. Some porter can stand there to collect the unclaimed ones at the end of a session. The older system requires you to hand over a ticket for the porter to pick up the bags. That is energy efficient and provide works to people.
Just a few thoughts of the fine old days.
Dr. Li
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: jeannieboef@xxxxxxxxx
Date: Mon, 30 Jan 2012 12:23:33 +0000
Subject: [EnergyPlus_Support] Re: Elevator and Escalator Energy Consumption and Heat Gain
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Primary EnergyPlus support is found at:
http://energyplus.helpserve.com or send a message to energyplus-support@xxxxxxxx
The primary EnergyPlus web site is found at:
http://www.energyplus.gov
The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/
Attachments are currently allowed but be mindful that not everyone has a high speed connection. Limit attachments to small files.
EnergyPlus Documentation is searchable. Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.
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You have mentioned many items, they are not really needed for energy saving of the building or operation.
EPlus manuals are very good reference books. Getting Started.PDF is sufficient as a text book. All the others are included as needed basis. There was a University Course PDF or PPT at the home page. Althugh it covered only the earlier version, the informatin provided are still useful.
People, lights, etc. need not be simulated. They only need to be consider for fresh air requirement and daylinght substitute application and simulated for confirmation of design. These numbers are needed for equipment sizing or window ventilation sizing. Annual simulation is required because the HVAC equipment COP is not constant and cannot be easily compared. Hence, the ASHRAE guide lines must be followed. Otherwise, it would be comparing apples with oragners.
Equipment heat should be designed to be vented to outside to reduce cooling or kept in to exist heating. EPlus has provided some of these options. Very few people uses them.
Comfort is not just 'clo' variation and activity changes for Winter and Summer, and skin evaporation. Chinese use clothes for body insulation in Winter and apply multilayer absorption cooling principle to keep cool.
Exposing more skin for cooling is not a good solution. I wore long sleeve shirt in Singapore. People asked me "don't you feel hot?" In fact, I feel cooler with long sleeve shirt. It is because the moisture is gever left on the skin, and the evaporation on the outside of the sleeve, kept the inside air cool.
You mentioned glass wall and ceilings for airport building. That is why an additional high shading is built over it. Subang airport in Malaysia has inverted mushroom above the terminal building.
There are many old buildings are more energy efficient than the new ones.
Bagage moving system: Why do you need to move the load continueously. Build it like a sorting system. The bags would drop down alphabetically. Some porter can stand there to collect the unclaimed ones at the end of a session. The older system requires you to hand over a ticket for the porter to pick up the bags. That is energy efficient and provide works to people.
Just a few thoughts of the fine old days.
Dr. Li
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: jeannieboef@xxxxxxxxx
Date: Mon, 30 Jan 2012 12:23:33 +0000
Subject: [EnergyPlus_Support] Re: Elevator and Escalator Energy Consumption and Heat Gain
These are all good questions, and if anyone has written a good text book on energy modeling in buildings, I would love to buy it. Now for answers:
The true accuracy of energy modelling is deturmined by the accuracy of the assumptions that have the biggest impact on energy usage.
Typically these are people, lighting and ventilation air conditioning. As lighting and ventilation are dependant on the assumed people usage, it is clear that people is the most important assumption. Unfortunately, hourly people numbers is often the biggest guess.
Elevators are required by ASHRAE 90.1, but I've looked into standby and usage losses of elevators. It does not significantly effect energy usage, but elevator lights should be considered. The new ASHRAE standard 90.1 requires auto off lighting for unoccupied elevators. X-Ray machines should be included. Ask Dr. Li, he has worked with X-Ray.
Don't forget printer rooms. A printer puts out up to 2000W when it's running. Transformer, switchboard and electrical rooms take up loads of cooling power. Also the baggage moving system of the new BBI Airport in Berlin uses about 2.2 MW of power and is considered 80% on, so don't forget the baggage moving system.
I believe there is a standard that requires a glass facad in airports. The type of glass here will have a large impact. The type of lighting and lighting control. Are your lights recessed?
The true accuracy of energy modelling is deturmined by the accuracy of the assumptions that have the biggest impact on energy usage.
Typically these are people, lighting and ventilation air conditioning. As lighting and ventilation are dependant on the assumed people usage, it is clear that people is the most important assumption. Unfortunately, hourly people numbers is often the biggest guess.
Elevators are required by ASHRAE 90.1, but I've looked into standby and usage losses of elevators. It does not significantly effect energy usage, but elevator lights should be considered. The new ASHRAE standard 90.1 requires auto off lighting for unoccupied elevators. X-Ray machines should be included. Ask Dr. Li, he has worked with X-Ray.
Don't forget printer rooms. A printer puts out up to 2000W when it's running. Transformer, switchboard and electrical rooms take up loads of cooling power. Also the baggage moving system of the new BBI Airport in Berlin uses about 2.2 MW of power and is considered 80% on, so don't forget the baggage moving system.
I believe there is a standard that requires a glass facad in airports. The type of glass here will have a large impact. The type of lighting and lighting control. Are your lights recessed?
__._,_.___
Primary EnergyPlus support is found at:
http://energyplus.helpserve.com or send a message to energyplus-support@xxxxxxxx
The primary EnergyPlus web site is found at:
http://www.energyplus.gov
The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/
Attachments are currently allowed but be mindful that not everyone has a high speed connection. Limit attachments to small files.
EnergyPlus Documentation is searchable. Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.
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