5. If a zone of type MW2 from Table 8-21 has a total lighting gain of 2500 W. The zone has two type of lighting systems 2000 W of suspended fluorescent unvented lights (67% radiative and 33% convective) and 500 W of incandescent lights (80% radiative and 20% convective). All lights are turned on daily for 9 hours from the beginning of 8 hour till the end of the 17th hour while the building is in use. During non-use hours all lights are turned off. Apply radiant time series method (RTSM) and calculate the total lighting load for the 10th and the 20th hour. Hour Lights Hour Lights Lights Hour Lights 1 Off Hour 13 7 Off ON 19 Off 2 Off 8 ON 3 Off ON Off ON ON Off 5 6 Off ON 9 10 11 12 012 35454542 14 15 16 17 18 ON ON ON ON Off 20 21 22 23 24 Off Off Off Off Off Table 8-21 Radiant Time Factors for Four Sample Zones LW MW 1 MW 2 HW To 0.50619 0.51669 0.25509 0.22419 ri 0.22962 0.20833 0.11396 0.07686 12 0.11864 0.10846 0.06959 0.05778 13 0.06390 0.06232 0.05133 0.05019 0.03533 0.03785 0.04259 0.04565 0.01989 0.02373 0.03771 0.04243 0.01134 0.01515 0.03461 0.03990 0.00653 0.00977 0.03241 0.03779 0.00380 0.00634 0.03071 0.03596 0.00222 0.00413 0.02931 0.03433 0.00131 0.00270 0.02809 0.03286 0.00079 0.00177 0.02700 0.03151 0.00048 0.00117 0.02598 0.03026 0.00030 0.00078 0.02504 0.02910 0.00020 0.00052 0.02414 0.02802 0.00014 0.00036 0.02328 0.02700 0.00010 0.00025 0.02246 0.02604 0.00008 0.00018 0.02167 0.02513 0.00007 0.00013 0.02091 0.02427 0.00006 0.00010 0.02018 0.02345 0.00006 0.00008 0.01948 0.02267 0.00005 0.00007 0.01880 0.02192 0.00005 0.00006 0.01815 0.02121 0.00005 0.00005 0.01751 0.02052 14 I'S 16 17 18 19 F10 Til 112 113 114 F15 F16 [17 F18 T19 120 121 122 123 Table 8-22 Solution for Example 8-15 Lighting Convective Hour Heat Gain, W Heat Gain, W 1 0 0 0 0 0 0 0 0 0 0 2000 660 2000 660 2000 660 2000 660 2000 660 2000 660 2000 660 2000 660 2000 660 0 0 0 0 0 0 2345 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Radiative Heat Gain, W 0 0 0 0 0 0 1340 1340 1340 1340 1340 1340 1340 1340 1340 0 0 0 0 0 0 Radiative Cooling Load, W 316.3 304.2 292.9 282.3 272.2 262.6 253.4 244.5 555.1 677.7 741.9 782.7 812.7 837.1 858.3 877.4 895.1 592.6 477.5 420.4 386.5 363.0 344.8 329.6 Cooling Load, W 316.3 304.2 292.9 282.3 272.2 262.6 253.4 244.5 1215.1 1337.7 1401.9 1442.7 1472.7 1497.1 1518.3 1537.4 1555.1 592.6 477.5 420.4 386.5 363.0 344.8 329.6 5. If a zone of type MW2 from Table 8-21 has a total lighting gain of 2500 W. The zone has two type of lighting systems 2000 W of suspended fluorescent unvented lights (67% radiative and 33% convective) and 500 W of incandescent lights (80% radiative and 20% convective). All lights are turned on daily for 9 hours from the beginning of 8 hour till the end of the 17th hour while the building is in use. During non-use hours all lights are turned off. Apply radiant time series method (RTSM) and calculate the total lighting load for the 10th and the 20th hour. Hour Lights Hour Lights Lights Hour Lights 1 Off Hour 13 7 Off ON 19 Off 2 Off 8 ON 3 Off ON Off ON ON Off 5 6 Off ON 9 10 11 12 012 35454542 14 15 16 17 18 ON ON ON ON Off 20 21 22 23 24 Off Off Off Off Off Table 8-21 Radiant Time Factors for Four Sample Zones LW MW 1 MW 2 HW To 0.50619 0.51669 0.25509 0.22419 ri 0.22962 0.20833 0.11396 0.07686 12 0.11864 0.10846 0.06959 0.05778 13 0.06390 0.06232 0.05133 0.05019 0.03533 0.03785 0.04259 0.04565 0.01989 0.02373 0.03771 0.04243 0.01134 0.01515 0.03461 0.03990 0.00653 0.00977 0.03241 0.03779 0.00380 0.00634 0.03071 0.03596 0.00222 0.00413 0.02931 0.03433 0.00131 0.00270 0.02809 0.03286 0.00079 0.00177 0.02700 0.03151 0.00048 0.00117 0.02598 0.03026 0.00030 0.00078 0.02504 0.02910 0.00020 0.00052 0.02414 0.02802 0.00014 0.00036 0.02328 0.02700 0.00010 0.00025 0.02246 0.02604 0.00008 0.00018 0.02167 0.02513 0.00007 0.00013 0.02091 0.02427 0.00006 0.00010 0.02018 0.02345 0.00006 0.00008 0.01948 0.02267 0.00005 0.00007 0.01880 0.02192 0.00005 0.00006 0.01815 0.02121 0.00005 0.00005 0.01751 0.02052 14 I'S 16 17 18 19 F10 Til 112 113 114 F15 F16 [17 F18 T19 120 121 122 123 Table 8-22 Solution for Example 8-15 Lighting Convective Hour Heat Gain, W Heat Gain, W 1 0 0 0 0 0 0 0 0 0 0 2000 660 2000 660 2000 660 2000 660 2000 660 2000 660 2000 660 2000 660 2000 660 0 0 0 0 0 0 2345 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Radiative Heat Gain, W 0 0 0 0 0 0 1340 1340 1340 1340 1340 1340 1340 1340 1340 0 0 0 0 0 0 Radiative Cooling Load, W 316.3 304.2 292.9 282.3 272.2 262.6 253.4 244.5 555.1 677.7 741.9 782.7 812.7 837.1 858.3 877.4 895.1 592.6 477.5 420.4 386.5 363.0 344.8 329.6 Cooling Load, W 316.3 304.2 292.9 282.3 272.2 262.6 253.4 244.5 1215.1 1337.7 1401.9 1442.7 1472.7 1497.1 1518.3 1537.4 1555.1 592.6 477.5 420.4 386.5 363.0 344.8 329.6