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The use of alternative refrigerants in domestic refrigerators HFC134a Dynamic Simulation and Experimental Research

Constantan thermocouple (Japan Import), its accuracy is ± 0.3 ℃. This article made in accordance with national standard cooling rate, storage temperature, power consumption, cooling capacity of the experiment, but also made a filling amount of additional experiments. The experiment also measured the compressor casing temperature increases,tory burch uk, temperature measurement points are located above the center of the compressor housing, import and export of wall evaporator refrigerator temperature, condenser outlet and the midpoint of the wall temperature. Filling volume (g) take 4 grams of the experiment back to the trachea ■ irrigation and refrigeration evaporator export Ju Tong degree compared with the calculated values in Figure 4, showing increased with the filling, refrigerator evaporator inlet and outlet temperature began to change , later rose slightly. The inlet port wall temperature is less than the wall temperature difference is less than 1 ℃. Calculated the average difference between the experimental values 1. Figure 5 in a compressed cabinet ambient temperature and mild cold room temperature, filling the freezer with the amount of wall temperature curve. One refrigerator and calculated the average air temperature difference of 1 + 2%; frozen wall and calculated the average temperature difference of 1.5. 0 abnormal filling volume (g) the amount of around 5 filling cabinet temperature compression experiments the ambient temperature in summer distribution and cold rooms, freezer room temperature compared with the calculated time (rain) around 6 degrees experiment arrest cooling freezer and refrigerator compared with the calculated average temperature in Figure 6 for the refrigerator freezer temperature and average temperature versus time curve. It can be seen from the chart just getting there is a lag in the process of machine, particularly in the cold room the most obvious. One cold and calculated the average air temperature difference of 3; frozen wall and calculated the average temperature difference of 5. Figure 7 for the freezer evaporator inlet and outlet temperature and the calculated values compared with time. Can be clearly seen from the chart there is a delay of just getting the process machine, and then evaporating temperature suddenly dropped, then began to decline slowly,tory burch uk, slowly stability. The import and calculated the average temperature difference of 0.8; exit temperature and calculated the average difference of 1.1. 3 time (rain) caught around 7 degree cooling experiment freezer evaporator inlet and outlet temperature compared with the calculated times am I blue Division (rain) around 8 degrees experiment condenser cooling catch the middle point of exit points compared with the calculated temperature Figure 8 for the mid-point and exit point of the condenser temperature versus time curve. Condensation can be seen from the chart there is a peak temperature started rising rapidly after the peak began to decrease, and finally stabilized. Where the middle point temperature and calculated the average difference of 4; exit points and calculated the average temperature difference of 3. After the above experiments, come to the performance of the refrigerator shown in Table 1, the refrigerator power consumption of 185 ordinary CFC12 about 1.10Kwh/24h so, can be seen from Table 1, the power consumption of experimental refrigerator 1.04KWh/24h, which 185 experiments CFCl2 refrigerator is good. 4 / 1996 of the measured cooling performance of hot box temperature Table 1 Experimental results of cooling rate coefficient of work 32Clh30minTFmax =- 20.218C0.29FRm = 4 ~ 8 storage temperature TF Ⅱ laz =- 19.138C0.7lFRm = 4.2 power consumption 25 ℃ 1.04kWh/24h0.34 cooling capacity of 25 ℃ 18h59min (3kg) 3. Conclusion l, using this mathematical model built by the boot process of the preparation of a refrigerator dynamic simulation program, cooling system components coupled by the parameter sets and a complete system. Detailed calculations which can be transient characteristics of the refrigeration system, and the same process of experimental research; calculated values at the experimental station kiss good validation of the model's reliability. 2, must be considered in the calculation of radiation heat transfer. 3, the use of HFcl34a entirely possible to achieve cFcl2 refrigerator energy consumption of refrigerators. A cross-section of the main symbol table,abercrombie deutschland, rfla Cpk be l/k1 thermal diffusivity heat capacity, D diameter, mP ... k volume. kg / sGr environmental husband Graham number. g acceleration due to gravity, m / sh baking, kJ / kghk latent heat of vaporization, kJikg1 length, mNu Nuxieerte number Pr Prandtl number P pressure, PaP 'comparative pressure q heat, kJ / m'Re Reynolds number T temperature , kt the time, su speed, m / sW patient number. Brick Technology Pavilion -6 * 4 / 1996 pairs of glistening heat transfer in the form,abercrombie uk, W / m · k angle dynamic viscosity. kg / ms surface tension. N / m acceleration of the average wall friction and gravity p stupid, Department of cooked {expansion coefficient,christian louboutin shoes, w / mN. P secret belly, kg / me black gv tendon subscript c capillary gas liquid s inspiratory reference r1 E13 Yang Shi-ming.
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