BTUH

AcronymDefinition
BTUHBritish Thermal Units per Hour
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BTUH has been successfully appointed by NHS England as an early Implementer of the National CUR CQUIN Scheme and provides an extensive range of acute services for 405,000 people living in south-west Essex.
For instance, if a SS system were being simulated in Miami in a high-efficiency home where the maximum cooling load was 12,000 Btu/h (3514 W), then the rated cooling capacity would be set at 19,914 Btuh(5832 W).Additionally, if the dual and ducted VS systems were being simulated, that minimum value would be set to approximately 24,000 Btuh (7029 W).
Models are available to deliver up to 5,000 BTUH of refrigeration.
Unit sizes available from 3,500 to 37,000 BTUH. Heatcraft Refrigeration Products, 2175 W.
Specifications Full-Load Amp: 3.0 (for 120V, 60Hz, 1 phase); 1.5 (for 220V, 50/ 60Hz, 1 phase) Wattage Rating @ 90 fpm (0.45 m/s) - see chart below for other wattage ratings 2x4 Models: 160 Watts @ 90 fpm, 60Hz (145 @ 50Hz) 2x3 Models: 140 Wafts @ 90 fpm, 60Hz (113 @ 50Hz) 2 x 2 Models: 72 Watts @ 90 fpm, 60Hz (67 @ 50Hz) To calculate sensible heat (in BTUH), multiply watts by 3.412 (e.g, for a 2' x 4' unit, at low speed, 170W x 3.412 = 580 BTUH) All prices are for turnkey systems and include wiring and panel-mount on/off Control Gel-sealed, DOP-tested, and CE marked units available; call Terra for pricing.
Table 1.Heat Loads and Boundary Conditions Manikin Load 75 W (255.9 BTUH) Laptop load 76 W (259.3 BTUH) Lighting load (each) 161.2 W (550 BTUH) Radiant panel temperature 62[degrees]F (16.67[degrees]C) Supply air temperature 60[degrees]F (15.56[degrees]C) Supply air volume 125 CFM (0.059 [m.sup.3]/s) Floor and side walls temperature 72[degrees]F (22.22[degrees]C) Front glass wall Convection wall Table 2.Temperature on Manikin Return Location Average Ceiling 78.9[degrees]F (26.1[degrees]C) Floor 81.3[degrees]F (27.4[degrees]C) Side Wall 79[degrees]F (26.1[degrees]C)
studied metabolic rates up to 1599 Btuh for males and 1277 Btuh for females (247 W/[m.sup.2] [4.25 met] and 234 W/[m.sup.2] [4 met], respectively, assuming, body surface areas are 1.9 [m.sup.2] and 1.6 [m.sup.2] for males and females).
Maximizing the presence of liquid refrigerant at the boiling point in the evaporator coil significantly increases EER (Energy Efficiency Ratio, Btuh cooling per Watt electric power) because boiling heat transfer coefficient in the liquid-nucleate regime is much greater than in vapor-mist refrigerant regime, where droplets boil in suspension and the tube walls are dry.
Heat Loss from Manikin in Figure 9 (Tin = 529.67 wdot = 0.588 lb/s) Factor [Pr.sub.t] = 1 [Pr.sub.t] = 0.7 [T.sub.out], R Q, BTUH [T.sub.out], R Q, BTUH 1 530.5 397.0 530.5 396.6 0.9 530.4 388.9 530.4 387.8 0.5 530.3 344.6 530.3 339.3 0.1 530.2 254.4 530.1 237.9 0.05 530.1 234.8 530.1 215.4 0.07 -- -- 530.1 224.9
IEER -- Integrated Energy Efficiency weighted Btuh per Watt according to ANSI/AHRI Standard 340/360-2007