Hi experts,

1) I am simulating cooling load of a shoebox room for a single day or single hour. I simulated the cooling load for one particular day/hour by nullifying the occupancy on other days/hours. For comparison, I simulated the hourly cooling load for that day and summed up hourly cooling energy. 

Day vs hourly cooling load. However, the results do not match. The value I get from simulation of one day is 15.9kWh, whereas the valueI get from the sum of hourly results is 23.7kWh. Anyone could enlighten me why the two values donot match?

2) Cooling energy vs cooling energy transfer. For the cooling load value, I take the result from the table "Report: ZoneCoolingSummaryMonthly", under the column ZONE/SYS SENSIBLE COOLING ENERGY [kWh]. I notice that in the results folder, there are files with extension .csv that contain results of "Cooling:EnergyTransfer [J](Hourly)". How is the COOLING ENERGY different from the Cooling:EnergyTransfer? 

3) Thermal layers. The room has two types of windows of different optical and thermal properties. However, there is only one ep_window layer. When I assign window A to ep_window layer and window B to ep_shading layer, I can get a value of cooling load. When the swap the two layers, assign window A to ep_shading layer and assign window B to ep_window layer, the cooling load change. If I assign any window geometry to the ep_adiabatic or ep_ceiling layer, the simulation throw out error. It seems that there is underlying algorithm associated with each layer. Could anyone enlighten me how to model a room with two types of glazing?

Many thanks in advance!

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