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9 o L SOLAR/1039-79/05 Monthly Performance Report SADDLE HILL TRUST LOT 73 MAY 1979 S. Department of Energy National Solar Heating and Cooling Demonstration Program National Solar Data Program I _ '7": NOTICE This report was prepared as an account of work sponsored by the United States Government. Neither the United States nor the United States Department of Energy, nor any of their employees, nor any of their contractors, subcontractors, or their employees, make any warranty, express or implied, or assume any legal liability or responsibility for the accuracy, completeness or usefulness of any information, apparatus, product or process disclosed, or represents that its use would not infringe privately owned rights. MONTHLY PERFORMANCE REPORT SADDLE HILL TRUST LOT 73 MAY 1979 I. SYSTEM DESCRIPTION Saddle Hill Trust Lot 73 is a single-family residence in Medway, Massachusetts. Solar energy is used for preheating incoming city water. The system has an array of flat-plate collectors with a gross area of 45 square feet. The array faces south at an angle of 45 degrees to the horizontal. A 60 percent glycerol solution is used as the medium for delivering solar energy from the collector array to storage. Water is the transport medium that delivers solar energy to storage and to the domestic-hot-water (DHW) heater. Solar energy is stored in the basement in an 80-gallon preheat tank. This preheated city water is supplied, on demand, to a conventional 40-gallon DHW tank. When solar energy is insufficient to satisfy the hot water requirements, the gas-driven DHW heater provides auxiliary energy for water heating. The system, shown sche- matically in Figure 1, has two modes of solar operation. Mode 1 Collector-to-Storage: This mode activates when a 40OF temperature difference exists between the collector and the preheat tank. Pump P1 is on. This mode continues operating until the temperature difference drops to 20F. Mode 2 Storage-to-DHW Tank: This mode activates when there is a demand for hot water. Hot water from the top of the preheat tank is transferred to the DHW tank to replace the amount removed. Simultaneously, city water is auto- matically supplied to the preheat tank. V TO01 0 1001 T150 T100 IW100 T202 ,a COLD WATER SUPPLY HOT *WATER SERVICE IT302 F300 Figure 1. SADDLE HILL TRUST, LOT NO. 73 SOLAR ENERGY SYSTEM SCHEMATIC II. PERFORMANCE EVALUATION INTRODUCTION The site was occupied in May and the solar energy system operated contin- uously during the month. Total solar energy collected was 1.1 million Btu and the total solar energy used was 0.68 million Btu or 62 percent of the collected energy. The change in stored energy was 0.01 million Btu, while the loss from storage amounted to 0.29 million Btu. Solar energy satisfied 57 percent of the DHW requirements. The solar energy system provided fossil fuel savings of 1.1 million Btu and incurred an electrical expense of 0.17 million Btu. WEATHER CONDITIONS During the month, total incident solar energy on the collector array was 1.8 million Btu for a daily average of 1292 Btu per square foot. This was below the estimated average daily solar radiation for this geographical area during May of 1433 Btu per square foot for a south-facing plane with a tilt of 45 degrees to the horizontal. The average ambient temperature during May was 610F as compared with the long-term average for May of 590F. THERMAL PERFORMANCE System During May the solar energy system performed approximately the same as expected. The expected performance was determined from a modified f-chart analysis using measured weather and subsystem loads as input. Solar energy used by the system was estimated by assuming that all energy collected would be applied to the load. Actual solar energy used was 0.68 million Btu versus an estimated 0.76 million Btu. System total solar fraction was 57 percent versus an estimated 64 percent. Collector The total incident solar radiation on the collector array for the month of May was 1.8 million Btu. During the period the collector loop was operating, the total insolation amounted to 1.6 million Btu. The total collected solar energy for the month of May was 1.1 million Btu, resulting in a collector array efficiency of 59 percent, based on total incident insolation. Solar energy delivered from the collector array to storage was 0.98 million Btu. Energy loss during transfer from the collector array to storage was 0.12 million Btu. This loss represented 11 percent of the energy collected. Operating energy required by the collector loop was 0.17 million Btu. Storage Solar energy delivered to storage was 0.98 million Btu. There were 0.68 million Btu delivered from storage to the DHW subsystem. Energy loss from storage was 0.29 million Btu. This loss represented 29 percent of the energy delivered to storage. The storage efficiency was 71 percent: This is calculated as the ratio of the sum of the energy removed from storage and the change in stored energy, to the energy delivered to storage. The average storage temperature for the month was 910F. DHW Load The DHW subsystem consumed 0.68 million Btu of solar energy and 0.86 million Btu of auxiliary fossil fuel energy to satisfy a hot water load of 1.1 million Btu. The solar fraction of this load was 57 percent. Losses from the DHW subsystem were 0.098 million Btu. A daily average of 59 gallons of DHW was consumed at an average temperature of 1280F delivered from the tank. OBSERVATIONS There are no significant observations to report. ENERGY SAVINGS The solar energy system provided a fossil fuel energy savings of 1.1 million Btu, while incurring an electrical energy expense of 0.17 million Btu. III. ACTION STATUS There are no significant items to report. SOLAR HEATING AND COOLING DEMONSTRATION PROGRAM MONTHLY REPORT SITE SUMMARY SITE: SADDLE HILLS TRUST LOT #73 MEDkAY, MA 02053 SOLAR/1039-79/05 REPORT PERIOD: MAY,179 SITE/SYSTEM DESCRIPTION: THE SADDLE HILL TRUST LOT #73 SOLAR ENERGY SYSTEM FURNISHES HOT WATER YEAR-ROUND TO A SINGLE FAMILY DWELLING. THE COLLECTOR IS A TWO-PANEL LIQUID COLLECTOR. STORAGE SPACE IS AN 80 GALLCN WATER TANK. AUXILIARY HOT WATER IS PROVIDED BY A GAS HOT WATER HEATER. GENERAL SITE DATA: INCIDENT SOLAR ENERGY COLLECTED SOLAR EhERGY AVERAGE AMBIENT TEMPERATURE AVERAGE BUILDING TEMPERATURE ECSS SOLAR CONVERSION EFFICIENCY ECSS OPERATING ENERGY TOTAL SYSTEM OPERATING ENERGY TOTAL ENERGY CONSUMED 1.802 40038 1.065 23661 61 N .A. 0.38 0.170 0.170 2. 092 MILLION BTU BTU/SQ.FT. MILLION BTU BTU/SQ.FT. DEGREES F DEGREES F MILLION BTU MILLION BTU MILLION BTU SUBSYSTEM SUMMARY: LOAD SOLAR FRACTION SOLAR ENERGY USED OPERATING ENERGY AUX. THERMAL ENERGY AUX. ELECTRIC FUEL AUX. FOSSIL FUEL ELECTRICAL SAVINGS FOSSIL SAVINGS HOT WATER 1.097 57 0.681 N.A. 0.514 N.A. 0.857 N.A. 1 .136 HEATING N.A. N.A. N.A. N. A N.A. N.A. N.A. N.A. N.A. COOLING N.A. N.A. N.A. N.A. N.A. N.A. N.A. N. A. N.A. SYSTEM TOTAL 1.097 MILLION BTU 57 PERCENT 0.681 MILLION BTU 0.170 MILLION BTU 0.514 MILLION BTU N.A. MILLION BTU 0.857 MILLION BTU -0.170 MILLION BTU 1.136 MILLION BTU SYSTEM PERFORMANCE FACTOR: 0.771 * DENOTES UNAVAILABLE DATA @ DENOTES NULL DATA N.A. DENOTES NOT APPLICABLE DATA REFERENCE: USER'S GUIDE TO THE MONTHLY PERFORMANCE REPORT OF THE NATIONAL SOLAR DATA PRCGRAM,FEBRUARY 28,1978, SOLAR/0004-78/18 SOLAR HEATING AND COOLING DEMONSTRATION PROGRAM MONTHLY REPORT SITE SUMMARY SITE: SADDLE HILLS TRUST LOT #73 MEDWAY, MA 02053 REPORT PERIOD: MAY,179 SITE/SYSTEM DESCRIPTION: THE SADDLE HILL TRUST LOT #73 SOLAR ENERGY SYSTEM FURNISHES HOT WATER YEAR-ROUND TO A SINGLE FAMILY DWELLING. THE COLLECTOR IS A TWO-PANEL LIQUID COLLECTOR. STORAGE SPACE IS AN 80 GALLON WATER TANK. AUXILIARY HOT WATER IS PROVIDED BY A GAS HCT WATER HEATER. GENERAL SITE DATA: INCIDENT SOLAR ENERGY COLLECTED SOLAR ENERGY AVERAGE AMBIENT TEMPERATURE AVERAGE BUILDING TEMPERATURE ECSS SOLAR CONVERSION EFFICIENCY ECSS OPERATING ENERGY TOTAL SYSTEM OPERATING ENERGY TOTAL ENERGY CONSUMED SUBSYSTEM SUMMARY: LOAD SOLAR FRACTION SOLAR ENERGY USED OPERATING ENERGY AUX. THERMAL ENG AUX. ELECTRIC FUEL AUX. FOSSIL FUEL ELECTRICAL SAVINGS FOSSIL SAVINGS HCT WATER 1.157 57 0.719 N.A. 0.543 N.A. 0.904 N.A. 1.198 HEATING N.A. N.A. N. A. N.A. N. A. N. A. N.A. N. A. N. A. COOLING N. A. NA. N. A. N.A. N.A. N,A. NA. N.A. N. A. 1.901 GIGA JOULES 454669 KJ/SQ.M. 1.123 GIGA JOULES 268694 KJ/SQ.M. 16 DEGREES C N.A. DEGREES C 0.38 0.179 GIGA JOULES 0.179 GIGA JOULES 2.207 GIGA JOULES SYSTEM TOTAL 1.157 GIGA JOULES 57 PERCENT 0.719 GIGA JOULES 0.179 GIGA JOULES 0.543 GIGA JOULES N.A. GIGA JOULES 0.904 GIGA JOULFS -0.179 GIGA JOULES 1.198 GIGA JOULES SYSTEM PERFORMANCE FACTOR: 0.771 * DENOTES UNAVAILABLE DATA a DENOTES NULL DATA N.A. DENOTES NOT APPLICABLE DATA REFERENCE: USER'S GUIDE TO THE MONTHLY PERFORMANCE REPORT OF THE NATIONAL SOLAR DATA PROGRAM,FEBRUARY 28,1978, SOLAR/0004-78/18 SOLAR/1039-79/05 SCLAR HEATING AND COOLING CEMCNSTRATION PROGRAM MONTHLY REPORT ENERGY COLLECTION AND STORAGE SUBSYSTEM (ECSS) SITE: SADDLE HILLS TRUST LOT #73 MEDWAY, MA 02053 REPORT PERIOD: MAY,1979 DAY OF MONTH 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 SUM AVG NBS ID INCIDENT SOLAR ENERGY MILLION BTU 0.086 0.105 0.074 0.074 0. 106 0.083 0.099 0.095 0.089 0.086 0.093 0.034 0.020 0.014 0.014 0.066 0.073 0.034 0.019 0.019 0.043 0.097 0.021 0.008 0.017 0.037 0.082 0.016 0.081 0.016 0.099 1.802 0.058 Q001 I----------- AMBIENT TEMP I EG-F 58 54 56 65 57 56 62 65 81 85 64 60 63 62 61 66 57 55 52 54 61 68 55 52 56 55 63 59 67 57 68 61 N113 I----------I ENERGY TO LOADS MILLION BTU 0.021 0.030 0.035 0.031 S 0.037 0.026 0.023 0.047 0.031 0.045 0.037 0.019 0.006 0.015 .0.008 0.021 0.018 0.024 0.011 0.008 0.007 0.029 0.018 0.014 0.003 0.012 0.025 0.013 0.011 0.024 0.033 0.681 0.022 --------- I AUX THERMAL TO ECSS MILLION BTU N C T A P P L I C A B L E N.A. N.A. ECSS ENERGY REJECTED MILLION BTU N T A P P L I C A B L E ECSS OPERATING ENERGY MILLION BTU 0.007 0.006 0.005 0.007 0.007 0. 005 0.006 0.007 0.007 0.007 0.007 0.007 0.004 0.005 0.005 0.007 0.007 0.005 0.005 0.005 0.006 0.0007 0.004 0.000 0.005 0.005 0.007 0.003 0.006 0.003 0.007 0.170 0.005 Q102 ECSS SOLAR CONVERSION EFFICIENCY 0.249 0.286 0.470 0.414 0.352 0.319 0.236 0.495 0.349 0.525 0. 397 0.544 0.292 1.076 0.556 0.315 0.241 0.716 0.580 0.392 0.160 0.300 0.856 1.731 0. 177 0.321 0.303 0.830 0.133 1 .466 0.338 0.378 N111 * DENOTES UNAVAILABLE DATA. @ DENOTES NULL DATA. N.A. DENOTES NOT APPLICABLE CATA. SOLAR/1039-79/05 N. A. N.A. SOLAR HEATING AND COOLING DEMONSTRATION PROGRAM MONTHLY REPORT COLLECTOR ARRAY PERFORMANCE SITE: SADDLE HILLS TRUST LOT #73 MEDWAY, MA 0205SOLAR/1039-79/05 REPORT PERIOD: MAY,1979 DAY OF MONTH 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 SUM AVG NBS ID I ---- --- INCIDENT SOLAR ENERGY MILLION BTU 0. C86 0.105 0.074 0.074 0.106 0.083 0 099 0.095 0.089 0.086 0.093 0.034 0.020 0.014 0.014 0.066 0.073 0.034 0.019 0,019 0.043 0.097 0.021 0.008 0.017 0.037 0.082 0.016 0.081 0.016 0.099 1.8C2 0.058 Q001 OPERATIONAL INCIDENT ENERGY MILLION BTU 0.082 C.099 0.066 0.071 0.103 0.076 0.092 0.090 0.085 0.082 0.089 0.031 0.014 0.010 0.011 0.062 0.068 0.030 0.015 0.014 0.039 0.092 0.015 0.000 0.014 0.032 0.077 0.009 0.074 0.011 0.095 1.648 0.053 COLLECTED SCLAR ENERGY MILLION BTL 0.057 C. C62 0.045 0.048 0. 65 0.051 C.C57 0.059 0.057 C. C55 0.057 0.018 0.C07 0.005 C CC6 0.0C43 0 042 C. C19 0.008 0.008 C. C26 0.059 O.CC8 0.000 0 009 C.C20 0.047 0.005 0.051 0.006 I 0. 64 1.065 0.034 QlO --------- DAYTIME AMBIENT TEMP DEG F 72 69 70 80 66 70 75 79 96 99 70 67 67 65 63 79 66 57 54 56 65 81 63 52 59 57 74 60 80 60 84 70 70 COLLECTOR ARRAY EFFICIENCY 0.661 0.591 0.609 0.656 0.614 0.619 0.568 0.622 0.642 0.637 0.616 0.531 0.324 0.379 0.425 0.654 0.567 0.552 0.402 0.410 0.602 0.609 0.401 0. 000 0.513 0. 546 0.572 0.347 0.630 0.387 0.642 0.591 SN100 DENOTES UNAVAILABLE DATA. S DENOTES NULL DATA. N.A. DENOTES NOT APPLICABLE DATA. SOLAR HEATING AND COOLING CEMCNSTRATION PROGRAM MONTHLY REPORT STORAGE PERFORMANCE SITE: SADDLE HILLS TRUST LOT #73 MECWAY, MA 0205SOLAR/1039-79/05 REPORT PERIOD: MAY,1979 DAY OF MONTH 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 SUM AVG NBS ID ENERGY TO STORAGE MILLION BTU 0.052 0.055 0.041 0.046 0.061 0.046 0.050 0.054 0.052 0.051 0.053 0.017 0.007 0.005 0.007 0.042 0.039 0.018 0.006 0.006 0.025 0.055 0.007 0.000 0.007 0.019 0.043 0.005 0.047 0.005 0.060 0.981 0.032 Q200 Q200- ENERGY FROM STORAGE MILLION BTU C.021 0.030 0. 035 0.031 0.037 C. 026 0.023 0.047 C.031 0.045 C. 037 0.019 0.006 C. 015 0.008 0.021 C.C18 0.024 C. 011 0.008 0.007 C. 29 0.018 C0.014 C C03 0.012 0. 025 0.013 0.011 C. 024 0.033 C.681 0.022 C201 ---------- I CHANGE IN STORED ENERGY MILLION BTU 0. C19 0.006 -0.010 0. CC4 0.008 C.CC2 0 009 -0.016 C.CC6 -0.011 -0.001 -0. C06 -0.002 -C. C09 0.012 C. C11 -0.014 -0.005 -C. CC 0.014 C.C07 -0.014 -0.014 C. C06 0.003 0.CC4 -0. 007 0.023 -C.C22 C.C11 C. 12 C.CCO Q202 STORAGE EFFICIENCY STORAGE AVERAGE TEMP DEG F 87 111 102 93 105 105 123 117 113 112 104 89 86 73 68 81 96 85 75 73 79 105 89 69 66 74 94 74 94 87 90 91 0.707 N108 * DENOTES UNAVAILABLE DATA. @ DENOTES NLLL DATA. N.A. DENOTES NOT APPLICABLE DATA. 0.782 0.663 0.614 0. 746 0.745 0.607 0. 660 0.582 0.705 0.667 0.682 0.742 0.506 1.204 1. 210 0.771 0.724 0.600 0.952 0.965 0.830 0.667 0. 553 1.000 1.213 0.788 0.672 1.219 0.716 0.310 0.735 SOLAR HEATING AND COOLING DEMONSTRATION PROGRAM MONTHLY REPORT HOT WATER SUBSYSTEM SITE: SADDLE HILLS TRUST LOT REPORT PERIOD: MAY,1979 #73 MEDWAY, MA 02053 SOLAR/1039-79/05 DAY OF MON. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 SUM AVG NBS HOT WATER LOAD MI LI ON BTU 0.041 0.034 0.035 0.047 0.052 0.027 0.023 0.044 0.030 0.044 0.042 0.025 0.012 0.047 0.040 0.050 0.028 0.043 0.033 0.031 0.028 0. 040 0.019 0.050 0.027 0.039 0.026 0.028 0.025 0.037 0.048 1.097 0.035 Q302 SOLAR FR.OF LOAD PER CENT 45 57 85 70 65 85 77 93 98 99 92 85 641 44 27 28 49 55' 36 26 23 42 74 42 18 21 55 56 38 58 58 57 N300 I-~--- SOLAR ENERGY USED MI LLI GN BTU 0.021 0.030 0.035 0.031 0.0371 0.026 0.023 0.047 0.031 0.0451 0.0371 0. 019 0.0061 0.015 0.008 0.021 0.018 0.024 0.011 0. 008 0.0071 0.029 0 018 0.0141 0.003 0.01.2 0.025 0.013 0.011! 0.024 0.033 0.681 -,RI 0.022 Q300 OPER ENERGY MILLION BTU N 0 T A P P L I C Al B L E N.A. N.A.i Q303 AUX THERMAL USED MILLION BTU 0.020 0.015 0.000 0.019 0.018 0.007 0.000 0.000 0.000 C.000 0.005 0.010 0.008 0.034 0.037 0.032 0.008 0.027 0.029 0.029 0.021 0.016 C.000 0.045 0.030 0.033 0.000 0.022 0.016 0.016 0.017 0.514 0.017 Q301 AUX ELECT FUEL MILLION BTU N! C T A P1 L I C Al B L El N.A. N.A.1 Q305 I-------- AUX FOSSIL FUEL MILLION SBTU 0 .033 0.024 0.000| 0.032 0.031 0.0111 0.000 0.000 0.0001 0.000 0.009| 0.017, 0.014 0.057 0.061 0.053 0.0141 0.045 0.048 0.049 0.036 0.0261 0.000 0.076 0.0501 0.055 0.0001 0,037 0.026 0.0271 0.028 0.857! 0.028 Q306 . ELECT ENERGY SAVINGS MILLION BTU N 0 T A P P L I C A B L E N.A. N.A. Q311 FOSSIL ENERGY SA VI NG S MILLION BTU 0.036 0.050 0.058 0.0511 0.062 0.044 0 .039 0.079 0.0521 0.075 0.061 0 .0311 0.010 0.025 0.0131 0.034 0.029 0.040 0.018 0.0131 0.011 0.049 0 .030 0.023 0.005 0.020 0.042 0.022 0.018 0.040 0.056 1.136 0.037 0313 SUP. WAT. TEMP DEG F 531 54 57 561 57 59 591 59 63' 621 58 61 59 60 611 60 58 601 65 641 61 62 601 59 61 59, 61 62 62 60 601 60 N305 S---I HOT WAT. TEMP DEG F 129 12r, 120 1241 126 118 1201 125 124' 1251 128 125 125 135 1411 137 127 127 131 132 132 128 1241 131 132 1301 127 120 133 127 1301 128 N307 ---- I * DENOTES UNAVAILABLE DATA. @ DENOTES NULL DATA. N.A. DENOTES NOT APPLICABLE HOT WATER USED GAL 63 541 63 78 83 51 41 73 52 75 71 44 23 74 641 80 49 74 55 48! 45 67 341 79 44 65 49 48 42 66 831 - 1835 S----- 1 S59 N308 1 DATA. SOLAR HEATING AND COOLING DEMONSTRATION PROGRAM MONTHLY REPORT ENVIRONMENTAL SUMMARY SITE: SADDLE HILLS TRUST LOT #73 MEDWAY, MA 02053 REPORT PERIOD: MAY,1979 SOLAR/1039-79/05 TOTAL INSOLATION BTU/SQ.FT 1917 2330 1642 1640 2366 1843 2210 2117 1975 1908 2066 763 449 310 313 1462 1627 752 422 427 956 2161 460 174 385 824 1828 352 1794 363 2202 40038 1292 Q001 DIFFUSE INSOLATION BTU/SQ.FT N 0 T A P P L I C A B L E N.A. N.A. AMBIENT TEMPERATURE, DEG F 58 54 56 65 57 56 62 65 81 64 60 63 62 61 66 57 55 52 54 61 68 55 52 56 55 63 59 67 57 68 61 N113 DAYTIME AMBIENT TEMP CEG F 72 69 70 80 66 70 75 79 96 99 70 67 67 65 63 79 66 57 54 56 65 81 63 52 59 57 74 60 80 60 84 70--- 70 RELATIVE E HUMIDITY PERCENT N 0 T A P P L I C A B L E N.A. WIND DIRECTION DEGREES N 0 T A P P L I C A B L E -- ---- N.A. N115 WIND SPEED M.P.H. N 0 T A P P L I C A B L E - --- - N.A. N114 I- -------- * DENOTES UNAVAILABLE DATA. a DENOTES NULL DATA. N.A. DENOTES NOT APPLICABLE DATA. UNIVERSITY OF FLORIDA III111111111111IIII IIIIIl 1111 I IIf II IIIIIHIHII 3 1262 09052 6095 I |
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