A peer-reviewed simulation of an assembly workshop in Shenyang, China, compared insulation and ventilation under cold-climate conditions. Changing wall heat transfer had a larger modeled heating effect than the same roof change. Additional outdoor air decreased cooling requirements while winter heating needs increased. Missing operating measurements prevent these comparisons from being treated as realized factory energy savings.
A peer-reviewed computer study compared thermal loads for a large vehicle assembly workshop in Shenyang, a city in northeastern China. The model gave a 10.6 per cent reduction in annual heating load across the tested wall-insulation range. The corresponding roof comparison gave 1.85 per cent. These are differences between simulated design cases; they do not describe a completed retrofit or a measured fall in energy use.[1]
Increasing the amount of outdoor air lowered modeled cooling loads while adding to winter heating demand. Assumed heat-recovery efficiencies were examined alongside cases without quantified effective recovery. Wall, roof and glazing properties were compared within the DeST building-simulation environment, using drawings and local weather information. One parameter changed at a time so the model could distinguish the relative thermal responses under otherwise unchanged assumptions.[1]
Actual consumption and reliable production schedules were unavailable, leaving the model uncalibrated to workshop measurements. Internal heat gains remained fixed. Different production intensity, climate, building shape or controls could alter the comparison. Ventilation also serves air-quality and production requirements that this thermal model did not calculate. Measured airflow and energy use would be needed before estimating the consequences of a change at an operating facility.[1]
