On-field validation of a seasonal performance calculation method for chillers in buildings

摘要: Abstract In the last years importance of part load conditions in estimation chiller performance real world operation has been completely acknowledged. As a matter fact, chillers are sized for peak loads, so they usually run under conditions, far from full ones, taken as references catalogues. Some methods these calculations already exist, both Standards and building energy simulation programs, but lack an extensive validation actual HVAC systems. this regard, present paper compares estimated via calculation method contained Standard EN 14825 against monitored data along entire cooling season, small plant large one. variation is used indeed. particular, method, interpolation between values EER rated performed by means intermediate parameter Z , equal to ratio electrical power consumption conditions. This allows designer draw more reliable profiles PLF (Part Load Factor) versus capacity (CR), order increase accuracy prediction achieve better at low ratio, especially when compared with linear suggested 14825.