By Lisa C Ng, Andrew K Persily, Steven J Emmerich
16 reference constructions were outlined by way of the U.S. division of strength, and created as EnergyPlus enter records, to be used in assessing new applied sciences and helping the improvement of power codes in pursuing construction power potency advancements. Infiltration charges within the EnergyPlus versions of the reference constructions have been enter as consistent airflow premiums, and never calculated in line with validated construction airflow idea. which will help extra physically-based airflow calculations, in addition to indoor air caliber research, versions of the sixteen reference constructions have been created within the multizone airflow and contaminant shipping application CONTAM. a couple of extra inputs needed to be outlined for the CONTAM types, and adjustments within the inside zoning have been required, to extra realistically account for airflow. Annual airflow and contaminant simulations have been played in CONTAM for 6 of the constructions. whereas the assumed infiltration premiums in EnergyPlus don't realistically mirror affects of climatic conditions, there are transparent relationships among the outdoors air swap charges calculated by way of CONTAM and climate. furthermore, the envelope airtightness values assumed in both procedure are obvious to have a tremendous influence at the air swap premiums. Contaminant analyses have been played for occupant-generated carbon dioxide, risky natural compounds from indoor assets, outside particulate topic, and open air ozone. The airflow and contaminant calculation effects offer an invaluable baseline for next use of those versions to enquire techniques to development air flow and different applied sciences which are meant to at the same time decrease development power intake whereas preserving or bettering indoor air caliber.
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Additional resources for Airflow and Indoor Air Quality Models of DOE Reference Commercial Buildings
Results. ) results. ) results. For all of the buildings, except the Hospital, the differences in calculated infiltration sensible load between the CONTAM and EnergyPlus (tight) models were 10 % to 60 % of the total energy consumption. For the Hospital, the differences in calculated infiltration sensible load were only 1 % to 5 % of the total energy consumption because the energy consumption for the Hospital is the highest among the six simulated buildings. ) results. Note that the values in Table 6 are total sensible loads over one year and that the differences between the CONTAM- and EnergyPlus loads are more significant for individual hours when the weather conditions lead to higher infiltration rates.
Models) infiltration load. 6 In general, the infiltration sensible heating loads are greater than the cooling loads, whether calculated by EnergyPlus or CONTAM. This is to be expected since the simulations were performed using Chicago weather. The infiltration heating loads calculated using CONTAM are about two to nine times higher than the EnergyPlus (tight) results. ) results. ) results. ) results. ) results. Note that these loads only accounted for the heating and cooling of the infiltration air and do not include latent loads, system effects or internal loads.
826 1219 1 34 <1 23 75 291 Daily average contaminant concentrations Min. Max. 793 1279 2 74 <1 52 15 172 Daily average contaminant concentrations Min. Max. 759 1054 1 61 <1 41 16 282 Daily average contaminant concentrations Min. Max. 741 1173 1 43 <1 32 20 180 Daily peak contaminant concentrations Min. Max. 1352 2433 5 86 2 61 31 343 Daily peak contaminant concentrations Min. Max. 759 1145 1 58 1 33 42 243 Daily peak contaminant concentrations Min. Max. 887 1416 2 57 1 32 104 812 Daily peak contaminant concentrations Min.
Airflow and Indoor Air Quality Models of DOE Reference Commercial Buildings by Lisa C Ng, Andrew K Persily, Steven J Emmerich