TAILIEUCHUNG - Relating the lab apartment to a full-size apartment in Beijing

The performance of the Sydney CBD market and surrounding suburbs rests on the fundamentals of supply and demand. Currently, there are 13 projects or 1,916 apartments being marketed. Of these projects, four are completed with only 13% of the stock remaining for sale. A further six projects or 940 apartments are under construction with the remaining yet to commence. Of the projects under construction, approximately 86% of the apartments have already been pre-sold. The Sydney CBD and surrounding suburbs are not facing an oversupplied market, due to numerous factors including the established nature of the locality, funding requirements and limited development opportunities. Demand levels are expected to. | Architecture Building Technology Laboratory Spring 2004 Relating the lab apartment to a full-size apartment in Beijing It is interesting to relate what we measure in the lab to real life. Our lab measurements will yield air change rates. What do these rates suggest about thermal comfort in a Beijing apartment Let s begin with the real apartment. 1. First estimate the heat load in Watts in the apartment. Use reasonable values for heat gains from occupants lights any equipment cooking and the sun. Please calculate your own total. For now let s use 1000 W. 2. Let s focus on convection and assume there is very little heat loss by conduction. This is appropriate when there is a small indoor-outdoor temperature difference. Please choose a temperature difference that you would like to maintain. As an example let s assume it is relatively warm outside and that we want only 2 K difference - that is we will accept an indoor temperature that is only 2 K warmer than outdoors. 3. Calculate the airflow V associated with your heat flow and temperature difference by using the following equation q p-Cp-V -Tou where p density of air kg m3 Cp specific heat of air 1000 J kg oC V flow rate m3 s For our example we obtain m3 s. 4. Express the result as an air-change rate. Let s assume the volume of the apartment is 100 m3. For our example we obtain ACH. 5. The air-change rate is the product of the window area at either the windward or leeward side and the air velocity at the opening. The air velocity at the opening is NOT the same as the free-stream velocity at the same height and in similar terrain open or urban for example and is NOT the same as what would be reported by a weather service. Please calculate the air speed for an opening area 1 of your choice. If we use the numbers we have so far and assume we have 2 m2 of opening somewhere between one and two balcony doors we then need m s as measured at the opening. 6. Now let s look at the model. The scale .

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