2 system(s) modelled in HVAC Builder on Midea's published performance data and validated against it. This page is listed by HVAC Builder from published data; Midea has not claimed it.
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Built in this model on the maker's published performance grid and validated against it — not verified by Midea. Each page names its source and says so.
| Midea MDV-D252W/DN1 (8 HP, 25 kW, V4+) — modelled | Midea VRF selection software v3.7 (2017 database, Midea's own distribution) — MDV-D252W/DN1 cooling grid, 100 % combination at 19 °C indoor wet bulb, total capacity and power input against outdoor dry bulb, and the spec row's cabinet and airflow (docs/midea-vrf-source.json) |
| Midea V6 MV6-560WV2GN1 (20 HP, 56 kW) — modelled | Midea V6 engineering data book, Table 2-8.7 — MV6-560WV2GN1 capacity and power input against outdoor temperature at 19 °C indoor wet bulb and a 100 % combination ratio (docs/vrf-outdoor-source.json) |
| Heat-pump frost/defrost derate | 43, from five makers | RMS 0.023, where the makers stand 0.029 from each other at the forty temperatures they share — the one generic curve is closer to each of them than they are to one another, and none is served much worse than any other (0.019–0.028 apiece). The EnergyPlus model this replaced had the shape inverted (deepest just below its 5 °C cutoff, then a 29-point step across it) and read up to 0.15 low |
| What a run of refrigerant pipe costs a machine's capacity | 23 lengths from one maker's table, plus three makers' figures at one common point | the model carries LG's table rather than fitting it, so it reproduces all 23 points: 0.91 at 100 m, 0.82 at 225. At the one point a second maker can be compared — sixty metres with forty of lift — the three lines read 0.898 (Midea V6, Trane), 0.927 (Midea V8S) and 0.94 (LG), and the model sits at LG's end of that band on purpose, because LG publish 575 cells with their conventions stated where the others are single points off a chart. The height turned out not to be worth a field: across LG's whole grid a hundred metres of level difference moves the factor by one point |
| VRF outdoor unit: power input against outdoor air temperature | six outdoor temperatures, 25–35 °C | the published example pair — the 56 kW outdoor unit with four of the 14 kW indoor units on it — modulated to the maker's rated duty the way the control modulates it, draws within +1 to +4 % of the maker's power at every point, at a 9.5 °C evaporating temperature and 0.67–0.79 of full compressor output. Both of those are physical rather than fitted: flat out the same machine is 15–20 % adrift, and given three times a VRF's real indoor airflow it evaporates at 15 °C and looks 19 % too efficient |
| VRF (multi-split): capacity against the connected-capacity ratio | eight makers | they agree on a two-regime law — exactly linear below 100 % connection, saturating above it by +2 to +8 % at 130 %, with Samsung allowing no credit above 130 % — and the model reproduces both without a correction term: below full connection each indoor coil caps its own take, above it the outdoor unit's map is the ceiling (+0 %, the conservative end of the band). The standards themselves rate only at unity connection (±5 %) |
| Midea MDV-D252W/DN1 (8 HP, V4+), modelled — a small frame declared from its own cabinet, against Midea's selection-software grid | 8 | the condenser declared from the cabinet and airflow — not the 20 HP scaled — and the machine modulated to the grid's capacity draws −1 to +1 % of the grid's power input at every temperature, the compressor at 0.62–0.72 of full output. The 10 and 12 HP frames in the same cabinet read 5–8 % under the grid and the 14 and 16 HP frames 13–20 % under, and are not published; the selector's own spec table disagrees with its grid on rated power by −20 to +9 % across the range, and the physics sides with the grid on the one frame it lands on |
From the validation page; every row is held by a test.
Listed from published data with the source named on every entry; a listing's figures are the manufacturer's, the model that runs them is ours. Solver results never depend on who has claimed what.