Patent ID: 8615371
Filing Date: 2013-12-24
Classification: B60H

Abstract:
1. A method for determining the energy consumption of a bus heating, ventilating, and air conditioning (HVAC) unit using a testing system having a volume simulating a bus internal volume, the HVAC unit including a refrigerant compressor and a fan for moving air, the refrigerant compressor configured to operate at one or more rotational speeds, the one or more rotational speeds corresponding to a multiple of one or more tested bus engine speeds, the testing system operable to apply one or more testing heat loads to the simulated bus internal volume, the method comprising: operating the HVAC unit for a test period; measuring power consumed by the compressor at at least one of a first testing heat load and a second testing heat load at one or more rotational speeds; measuring power consumed by the fan at the at least one of a first testing heat load and a second testing heat load at each of the one or more rotational speeds; determining an association between (a) each of the measured power consumed by the compressor and the measured power consumed by the fan at the at least one of a first testing heat load and a second testing heat load and (b) one or more tested bus engine speeds; calculating power consumed by the compressor and power consumed by the fan at the at least one of a first testing heat load and a second testing heat load at a plurality of profiled bus engine speeds based on the association, wherein the plurality of profiled bus engine speeds is derived from a bus road profile of known bus engine speeds at known time durations, the known time durations summing to a time period; and calculating energy consumed as energy consumed by the compressor and energy consumed by the fan at the at least one of a first testing heat load and a second testing heat load over the time period.