BS EN 4855-01:2020 pdf free download – Aerospace series一ECO efficiency of catering equipment Part 01: General conditions.
5.2 Environmental conditions
All tests shall be performed in a room with a maximum air speed of 0,2 m/s.
The ambient temperature shall be (24 ± 3) °C. The ambient temperature shall be held during the whole test run and shall not be influenced by the EUT or other equipment.
The ambient temperature and air flow shall be measured at a distance between 0,5 m and 2 m from each equipment.
The ambient temperature measurement shall be started directly before test start. The sample time of the temperature measurement shall be set to at least 0,5 Hz.
The tests shall be performed at an ambient pressure level of (1 0 13,25 ± 50) hPa.
5.3 Power supply and voltage
Each equipment under test (EUT) shall be connected as instructed by the respective manufacturers’ lCD of the EUT PN. The rated voltage shall be (115 ± 2) VAC on each of the three phases. The frequency during test shall be set to (400 ± 5) Hz.
5.4 Measurement equipment
A device to measure the temperature shall be provided.
All measurement equipment shall be calibrated.
All temperature measurement equipment shall have a maximum measuring tolerance of ±0,5 K. Table 1 shows the required equipment.
For convenience all terms of “power” related to electrical power measurements, in this document and in EN 4855-02, EN 4855-03 and EN 4855-04, the term of “apparent power” shall be applied
5.5 General weight measurement conditions
For all EUT the empty weight in [kg] has to be determined.
Any insert, which does not belong to the equipment PN, shall be removed (e. g. server, oven racks etc.).
EUT shall be completely drained.
5.6 Noise measurement
The sound power shall be measured in A-weighted octave bands and calculated as described in EN ISO 3744:2010, Clause 8 and E.1. A test setup with nine microphones as described in Figure C.7 shall he used for the test.
NOTE 1 The test can be performed without the corner microphone positions 5 to 8 (according to EN ISO 3744:2010, Figure C.7).
NOTE 2 The noise measurement for beverage makers is not necessary.
5.7 Reference aircraft and reference mission
5.7.1 General
The energy consumption index (ECI) is calculated based on parameters for a reference aircraft and mission. The energy consumption index is based on the calculation of the kerosene consumption for the EUT related to a reference.
5.7.2 Assumptions
a) Reference mission and description are:
The reference mission is a mid-range mission of 3 000 nm (5 556 km), which includes a ground, a climb, a cruise and a descent phase. The descent phase can be disregarded due to short duration and unused catering equipment.
The durations of the phases are:
— ground phase: 60 mm;
— climb phase: 28 mm;
— cruise phase: 6 h.
During the whole flight mission, two catering phases are performed. Moreover the use cases (catering profiles) of the different equipment types are defined as:
— ovens: During the climb phase, the oven runs in standby mode. During the cruise phase the oven is used four times as each of the two catering phases includes two times of heating. The standby duration [refer to 5.7.3 a)] during cruise phase is a set value based on the heating cycle duration of the reference equipment;
— chilling equipment: This equipment type is turned on during ground phase. After 60 mm of ground phase duration, it can be assumed, that the freezer is in a steady state during the climb and cruise phase;