Monthly performance report

SOLAR/2018-79/04

Monthly
Performance
Report




REEDY CREEK UTILITIES
APRIL 1979












SNational Solar Heating and
Cooling Demonstration Program

National Solar Data Program
































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
REEDY CREEK UTILITIES
APRIL 1979

I. SYSTEM DESCRIPTION


The Reedy Creek site is a two story, 6,100 square foot concrete block
office building located in Lake Buena Vista, Florida. The solar energy
system is designed to provide space heating, domestic hot water and
space cooling.


The collector subsystem is composed of a horizontal array of 16 parabolic
trough collectors, manufactured by AAI Corporation, with tracking absorber
tubes. The collector array is an integral part of the building's roof,
with the reflector troughs oriented so that each major axis is in an
east-west direction. The 16 absorber tubes are moved in unison in a
north-south direction by the solar tracking system. The total collector
aperture area is 3,840 square feet. Water is used as the heat collec-
tion, transfer, and storage medium. Collected solar energy is stored in
a 10,000-gallon hot water tank, located adjacent to the building and
shaded by the roof. Domestic hot water is provided by a heat exchanger
immersed in this tank. Space heating is provided by circulation of hot
water from the storage tank through heat exchangers located in the
central air distribution system. No auxiliary energy is provided for
either domestic hot water or space heating.


A 25-ton absorption chiller utilizes hot water from solar storage to
provide chilled water to a 10,000-gallon cold water storage tank. For
space cooling, water from this cold tank is circulated through heat
exchangers located in the building's central air distribution system.
Auxiliary cooling is provided by supplemental cold water from the
utility district's central chiller plant, which is powered by fossil
fuels.






The system, shown schematically in Figure 1, has five modes of solar
operation.


Mode 1 Collector-to-Storage: This mode is entered when the collector
absorber plate temperature is 100F higher than the temperature at the
bottom of the hot storage tank (water solar thermal storage). Water is
circulated through the collector array-storage loop by pump P1 until the
temperature of the water at the bottom of storage rises to within 30F of
that of the collector absorber plate.


Mode 2 Storage-to-Space Heating: This mode is entered when the
temperature falls below the setting of the thermostats located in the
occupied areas. Since this is the only means of space heating avail-
able, no minimum tank temperature is specified. Pump P2 causes hot
water to flow directly from the storage tank to the heat exchanger in
the air-handling unit, and back to the storage tank.


Mode 3 Domestic Hot Water Heating: Domestic hot water (DHW) is provided
by passing city supply water through a heat exchanger immersed in the
solar thermal storage tank. No conventional water heater exists, thus
water is heated only upon demand. A tempering valve is used when neces-
sary to reduce the temperature of water leaving the heat exchanger. If
the water is too hot, cold supply water is mixed with it in the tempering
valve before going to the domestic hot water line.


Mode 4 Chilled Water Production: This mode is entered when the
temperature of the water in the top of the solar thermal storage tank
is at or above the generator operating temperature (nominally 1800F) and
that of the water at the bottom of the 10,000-gallon chilled water
storage is greater than 450F. Hot water is drawn from the solar thermal
storage tank to operate the generator section of the absorption chiller
and cold water is circulated through the chiller from the chilled water
storage. Energy is removed from the cold water, lowering its tempera-
ture; the energy is rejected though the cooling tower, and the cold
water returns to the chilled water storage tank. Whenever the temperature












* 1001 COLLECTOR PLANE TOTAL INSOLATION
* 1002 COLLECTOR PLANE DIFFUSED INSOLATION
V T001 OUTDOOR TEMPERATURE SPACE
HEATING
OR COOLING
SUPPLY


(TRACKING
MECHANISM)


EP403


T402
v


W502


COLD WATER
SUPPLY


DOMESTIC
HOT
WATER


AUX.
CHILLED
WATER


REVISED 4/5/79


Figure 1. REEDY CREEK SOLAR ENERGY SYSTEM SCHEMA TIC







of the water going to the generator exceeds the upper limit of 1950F,
the water is tempered with cooler water returning through valve V4.


Mode 5 Space Cooling: The space cooling mode is initiated when the
building temperature exceeds the setting of the conditioned space
thenrmostat. Chilled water from the chilled water storage is then
circulated by pump P6 to the heat exchangers in the building air distribu-
tion system. If the chilled water storage system is not able to meet
the cooling load, an auxiliary chilled water supply is available from
the central energy plant.


II. PERFORMANCE EVALUATION


The system performance evaluations discussed in this section are based
primarily on the analysis of the data presented in the attached computer-
generated monthly report. This attached report consists of daily site
thermal and energy values for each subsystem, plus environmental data.
The performance factors discussed in this report are based upon the
definitions contained in NBSIR 76-1137, Thermal Data Requirements and
Performance Evaluation Procedures for the National Solar Heating and
Cooling Demonstration Program.


A. Introduction


The Reedy Creek solar energy system operated continuously throughout the
month of April. The domestic hot water demand was 0.19 million Btu; the
space heating demand was 0.48 million Btu; the space cooling demand was
9.78 million Btu. The solar energy system supplied 100 percent of the
domestic hot water and space heating requirements, and 81 percent of the
space cooling requirements these quantities are reported in the attached
computer printout as loads.







B. Weather


For April, the average outside ambient temperature measured at the site
was 750F. The long-term average temperature is 72F at the Orlando
weather station. The average measured insolation in the plane of the
array was only 1,642 Btu/ft2-day. This is considerably less than the
long-term average of 1,896 Btu/ft2-day for April, which was derived
from measurements also taken at the Orlando weather station.


C. System Thermal Performance

Collector Of the 189.13 million Btu incident on the collector array,
28.80 million Btu were collected and delivered to the solar thermal stor-
age tank. This represents an array efficiency of 15.2 percent. Operating
energy of 1.43 Million Btu (419 kwh) was required to collect and store
this solar energy.

Storage Of the 28.80 million Btu delivered to storage, 15.93 million Btu
were subsequently removed for use within the system. Temperature probes
within the solar thermal storage tank indicate that the internal energy
of the water decreased by 0.89 million Btu during the month. This indi-
cates a resulting loss to the environment of 11.88 million Btu through the
tank insulation. A further discussion of the tank insulation heat trans-
fer is contained in Section II-D, Observations.

domestic Hot Water Domestic hot water is provided to the building by
passing city water through a heat exchanger that is immersed in the
solar thermal storage tank. A total of 383 gallons of water at an
average temperature of 1300F were supplied by this system during April.
The average temperature increase was 60F, which resulted in a measured
demand of 0.19 million Btu. All of this energy was supplied by the
solar energy system. There was no operating energy required.








Space Heating Space heating was required during a portion of six
different days during April Hot water was pumped from the solar
thermal storage tank to a heat exchanger coil in the air ducts to
satisfy this requirement. An operating energy expenditure of 0.08
million Btu (23 '.wh) was required to satisfy the 0.48 million Btu
demand.


Abscrption Chiller The absorption chiller operated on 13 occasions to re-
.J,,e the chilled water storage temperature during April. Use of 0.73 mil-
lion Btu of electrical energy from the auxiliary conventional cooling system
was -equired to assist the absorption chiller to meet the cooling load on nine
days of the month. The absorption chiller utilized 15.26 million Btu from the
solar thermal storage tank to remove 9.20 million Btu from the chilled
w,-ter storage (see attached Auxiliary Performance data). The resulting
coefficient of performance of 0.602 is slightly higher than that exper-
it,'. in the past few months. It is the result of consistently good
solar energy collection which maintained a high storage tank temperature,
-.nd crsistent operation of the chiller at generator and evaporator tem-
-rati.res which result in high efficiency.


Chilled Water Storage Performance of the chilled water storage (see at-
tac--ed Auxiliary Storage Performance data) shows that 9.20 million Btu
were removed by the chiller, 7.96 million Btu were added from the condi-
tiered space during cooling, and the internal energy of the chilled water
stora e decreased by 0.22 million Btu. This implies that 1.02 million Btu
wer- -ilned by the water from the ambient environment through the insula-



rpce Cooling Space cooling was required on all of the working days of
"' month. The space cooling load was 9.78 million Btu. Water from the
chilled water storage was pumped through the air duct heat exchangers to
remove 7.9t million Btu. Chilled water from the central plant was required
to assist in s:,-'orting the coolinl load during nine days of the month.
is resulted f,-,. the previous use of the chilled water storage for space
cooling, which had raisPd the storage temperature to a level near the room
rremeratu.- M: ri.le, suffici-nt solar energy had not been collected to
all j use of t atbs'rption chiller.






D. Observations


During the month of April, the ratio of direct to diffuse solar radiation
was quite high, due to a lack of cloud cover. The solar collectors essen-
tially collect only direct solar radiation due to the reflector geometry
and, therefore, a relatively large amount of solar energy was collected
during April. As a result of this, the absorption chiller operated at a
high efficiency while being supplied with this high temperature thermal
energy.


Losses from the storage tank during April were relatively large, at 11.88
million Btu. This loss during the month of March was only slightly smal-
ler, being 8.5 million Btu. Both of these values are larger than would be
expected for the insulated storage tank, and larger than has been exper-
ienced in previous months. The mode of this energy loss from the tank, if
not through the insulation, cannot be detected with the current instrument-
ation present at the site. This loss which is larger than previous months
may be due to instrumentation changes which were made at the site during
February. Speculation as to the method of loss might include very low
flow conditions through the collectors during norn-collection periods.
This might occur as the result of thermosyphoning from the storage tank,
or occasional short cycling of the collector pumps, which would generally
not be seen when occurring between data scans by the instrumentation pack-
age.


E. Energy Savings


Total system electrical energy savings of -0.4 million Btu (-123 kwh)
(expense) were realized. This value assumes that, had there not been
a solar energy system, the energy requirements would have been met by
an electrical hot water heater and by a conventional elc-'trical heat
pump. The value of energy savings is negative this jnonth, priwerily







as a result of the extremely low space heating load. Space heating
electrical savings which result from a greater load are generally
larger than the collector operating energy, and normally result in a
net electrical savings.


III. ACTION STATUS


The discrepancy of the temperature sensor at the generator exit of the
absorption chiller is being investigated.







SOLAR HEATING AND COOLING DEMONSTRATION PROGRAM


MONTHLY REPORT
SITE SUMMARY


SULAR/2018-79/04


SITE: REEDY CREEK
REPORT PERIOD: APRIL,1979


SITE/SYSTEM DESCRIPTION:
THE REEDY CREEK SITE IS A 6100 SQ. FT. CONCRETE BLOCK OFFICE BUILDING.
THE LIQUID SYSTEM EMPLOYS 3840 SQ. FT. OF PARABOLIC TROUGH COLLECTORS
WHICH FORM AN INTEGRAL PART OF THE ROOF. THE SYSTEM IS DESIGNED TO PROVIDE
SPACE HEATING, COOLING AND DOMESTIC HOT WATER. STORAGE CONSISTS OF 10 000
GALLONS OF BOTH HOT AN6 COLD WATER. AN ABSORPTION CYCLE CHILLER PROVIDES
COOLING, A RADIANT HOT WATER COIL PROVIDES HEATING AND A COIL SUBMERGED I
THE HOT STORAGE TANK PROVIDES HOT WATER. AUXILIARY COOLING IS PROVIDED BY
CHILLED WATER FROM THE CENTRAL COOLING PLANT. THERE IS NO AUXILIARY DHW OR
HEATING.
GENERAL SITE DATA:
INCIDENT SOLAR ENERGY 189.129 MI


COLLECTED SOLAR ENERGY
AVERAGE AMBIENT TEMPERATURE
AVERAGE BUILDING TEMPERATURE
ECSS SOLAR CONVERSION EFFICIENCY
ECSS OPERATING ENERGY
TOTAL SYSTEM OPERATING ENERGY
TOTAL ENERGY CONSUMED


LLION BTU


49252 BTU/SQ.FT.
28.799 MILLION BTU
7500 BTU/SQ.FT.
75 DEGREES F
74 DEGREES F
0.08
1.427 MILLION BTU
5.461 MILLION BTU
34.987 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
0.191
100
0.191
N.A.
N.A.
N.A.
N.A.
0.191
N.A.


HEATING
0.477
100
0.477
0.085
N.A.
N.A.
N.A.
0.175
N.A.


COOLING
9.781
81
15.264
3.949
1.817
0.727
N.A.
0.643
N.A.


SYSTEM TOTAL
10.450 MILLION
83 PERCENT
15.932 MILLION
5.461 MILLION
1.817 MILLION
0.727 MILLION
N.A. MILLION
-0.419 MILLION
N.A. MILLION


SYSTEM PERFORMANCE FACTOR:


0.507


* 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 PROGRAMFEBRUARY 28,1978,
SOLAR/0004-78/18


BTU
BTU
BTU
BTU
BTU
BTU
BTU
BTU







SOLAR HEATING AND COOLING DEMONSTRATION PROGRAM
MONTHLY REPORT
SITE SUMMARY


SOLAR/2018-79/U-


SITE: REEDY CREEK
~-PORT PERIOD: APRIL,1979


SITE/SYSIEM DESCRIPTION:
THE REED CREEK SITE IS A 6100 SQ. FT. CONCRETE BLOCK OFFICE bUILDING.
TE LIQUID SYSTEM EMPLOYS 3840 SQ. FT. OF PARABOLIC TROUGH COLLECTORS
WHICH FORM AN INTEGRAL PART OF THE ROOF. THE SYSTEM IS DESIGNED TO PROVIDE
SPACE HEATING COOLING AND DOMESTIC HOT WATER. STORAGE CONSISTS CF 10,000
GALLONS OF BOTH HOT AN5 COLD WATER. AN ABSORPTION CYCLE CHILLER PROVIDES
.? LING, A RADIANT HCT WATER COIL PROVIDES HEATING AND A COIL SURBMRGED IN
THE HOT STORAGE TANK PROVIDES HOT WATER. AUXILIARY COOLING IS "Rr:VIDED BY
CHILLED WATER FROM THE CENTRAL COOLING PLANT. THERE IS NO AUXILIARY DOn OP
HEATING.


GENERAL SITE DATA:
INrIDENT 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


1C9.531
559310
30.383
85167
24
23
0.08
1.506
5.761
36.911


GIGA JOULES
KJ/SQ.M.
GIGA JOULES
KJ/SQ.M.
DEGREES C
DEGREES C


GIGA
GIGA
GIGA


JOULES
JOULES
JOULES


SUBSYSTEM SUMMARY:
LOAD
SOLAR FRACTION
SOLAR ENERGY USED
OPERATING ENERGY
AUX. THERMAL ENG
AUX. ELECTRIC FUEL
AUX. FOSSIL FUEL
ELECTRICAL SAVINGS
FOSSIL SAVINGS


HOT WATER
0.201
100
0.201
N.A.
N.A.
N.A.
N.A.
0.201
N.A.


HEATING
0.504
100
0.504
0.089
N.A.
N.A.
N.A.
0.185
N.A.


COOLING
10.319
81
16.103
4.166
1.917
0.767
N.A.
0.678
N.A.


SYSTEM TOTAL
11.024 GIGA JOULES
83 PERCENT
16.808 GIGA JOULES
5.761 GIGA JOULES
1.917 GIGA JOULES
0.767 GIGA JOULES
N.A. GIGA JOULES
-0.442 GIGA JOULES
N.A. GIGA JOULES


SYSTEM PERFORMANCE FACTOR:


0.507


* DENOTES UNAVAILABLE DATA
@ DENOTES NULL DATA
N.A. DENOTES NOT APPLICABLE DATA
REFERENCE: USER'S GUIDE TO THE MONTHLY PERFORMANCE REPORT
OF THE NATIONAL SCLAR DATA PROGRAM,FEBRUARY 28,1978,
SOLAR/0004-78/18






SOLAR HEATING AND COOLING DEMONSTRATION PROGRAM
MONTHLY REPORT
ENERGY COLLECTION AND STORAGE SUBSYSTEM (ECSS)


SITE: REEDY CREEK
REPORT PERIOD: APRIL,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
SUM
AVG
NBS ID


SOLAR/2018-79/04


AMBIENT
TEMP

DEG-F


INCIDENT
SOLAR
ENERGY
MILLION
BTU
5.621
6.099
5.805
6.007
3.504
8.446
8.397
7.672
5.488
7.396
6.271
6.631
5.477
8.140
8.581
8.458
*
8.045
7.668
6.337
5.566
5.891
0.762
2.039
6.651
6.687
6.263
8.248
4.371
189.129
6.304
Q001


ENERGY
TO
LOADS
MILLION
BTU
-0.000
0.043
1.287
0.003
0.008
2.328
1.242
0.115
0.757
0.009
0.014
1.409
0.000
1.583
1.047
1.259
*
0.889
0.083
0.870
0.000
0.045
0.009
0.009
0.006
0.013
0.360
1.470
0.012
15.932
0.531


AUX
THERMAL
TO ECSS
MILLION
BTU
N
0
T
A
P
P
L
I
C
A
B
L
E


N.A.
N.A.
--------


ECSS
OPERATING
ENERGY
MILLION
BTU
0.034
0.047
0.037
0.049
0.020
0.079
0.079
0.071
0.036
*
0.058
0.052
0.048
0.034
0.077
0.076
0.080
*
0.073
0.066
0.044
0.031
0.029
0.000
0.000
0.051
0.041
0.040
0.071
0.010
1.427
0.048
Q102


ECSS
ENERGY
REJECTED
MILLION
BTU
N
0
T
A
P
P
L
I
C
A
B
L
E













N.A.
N.A.


ECSS SOLAR
CONVERSION
EFFICIENCY


-0.000
0.007
0.222
0.000
0.002
0.276
0.148
0.015
0.138
0.001
0.002
0.213
0.000
0.194
0.122
0.149
0.110
0.011
0.137
0.000
0.008
0.012
0.004
0.001
0.002
0.057
0.178
0.003

I----------,---
0.084
N111


* DENOTES UNAVAILABLE DATA.
@ DENOTES NULL DATA.
N.A. DENOTES NOT APPLICABLE DATA.


75
N113





SOLAR HEATING AND CCOLING DEMONSTRATION PROGRAM


MONTHLY REPORT
COLLECTOR ARRAY PERFORMANCE


SOLAR/2018-79/04


SITE: REEDY CREEK
REPORT PERIOD: APRIL,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
SUM
AVG
NBSID


INCIDENT
SOLAR
ENERGY
MILLION
BTU
5.621
6.099
5.805
6.007
3.504
8.446
8.397
7.672
5.488
*
7.396
6.271
6.631
5.477
8.140
8.581
8.458
8.045
7.668
6.337
5.566
5.891
0.762
2.039
6.651
6.687
6.263
8.248
4.371
189.129
6.304
Q0001


OPERATIONAL
INCIDENT
ENERGY
MILLION
BTU
2.961
4.101
3.292
4.577
1.976
7.555
7.539
6.524
3.150
5.215
4.198
4.540
3.235
7.178
7.501
7.484
*
6.897
6.075
4.088
2.521
2.481
0.000
0.000
4.668
3.690
3.681
6.883
1.065
131.867
4.3q6


DAYTIME
AMBIENT
TEMP
DEG F


COLLECTOR
ARRAY
EFFICIENCY


COLLECTED
SOLAR
ENERGY
MILLION
BTU
0.376
0.714
0.593
0.804
0.306
2.012
1.995
1.487
0.450
0.984
0.741
0.810
0.595
1.651
2.065
2.048
*
1.890
1.418
0.802
0.382
0.304
0.000
0.000
1.087
0.704
0.702
1.864
0.095
28.799
0.960
Q100


82 0.152
N100


* DENOTES UNAVAILABLE DATA.
@ DENOTES NULL DATA.
N.A. DENOTES NOT APPLICABLE DATA.


0.067
0.117
0.102
0. 134
0.087
0.238
0.238
0.194
0.082
0.133
0.118
0.122
0.109
0.203
0.241
0.242
0.235
0.185
0.127
0.069
0.052
0.000
0.000
0.163
0.105
0.112
0.226
0.022






SOLAR HEATING AND COOLING DEMONSTRATION PROGRAM
MONTHLY REPORT
STORAGE PERFORMANCE


SITE: REEDY CREEK
REPORT PERIOD: APRIL,1979


SOLAR/2018-79/04


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
SUM
AVG
NBS ID


ENERGY
TO
STORAGE
MILLION
BTU
0.376
0.714
0. 593
0.804
0.306
2.012
1.995
1.487
0.450
*
0.984
0.741
0.810
0.595
1.651
2.065
2.048
*
1.890
1.418
0.802
0.382
0.304
0.000
0.000
1.087
0.704
0.702
1.864
0.095
28.799
0.960
Q200


ENERGY
FROM
STORAGE
MILLION
BTU
-0.000
0.043
1.287
0.003
0.008
2.328
1.242
0.115
0.757
*
0.009
0.014
1.409
0.000
1.583
1.047
1.259
*
0.889
0.083
0.870
0.000
0.045
0.009
0.009
0.006
0.013
0.360
1.470
0.012
15.932
0.531
Q201


CHANGE
IN STORED
ENERGY
MILLION
BTU
0.115
0.439
-1.068
0.461
0.063
-0.556
0.241
1.129
-0.543
*
-0.696
0.575
-0.805
0.325
-0.220
-0.052
-0.021
*
-0.011
0.711
-0.753
0.010
0.052
-0.304
-0.273
0.902
0.376
-0.010
-0.733
-0.189
-0.892
-0.030
Q202


STORAGE
AVERAGE
TEMP
DEG F

164
169
166
160
164
163
161
166
170
*
161
167
167
163
166
164
163
*
163
166
166
160
161
159
156
160
168
172
164
160


164

----------


* DENOTES UNAVAILABLE DATA.
@ DENOTES NULL DATA.
N.A. DENOTES NOT APPLICABLE DATA.


STORAGE
EFFICIENCY



0.306
0.675
3.370
0.577
0.233
0.881
0.743
0.837
0.474
-0.697
0.795
0.746
0.546
0.826
0.481
0.605
0.465
0.561
0.145
0.027
0.322
1.000
1.000
0.835
0.552
0.498
0.395
-1.872


0.522
N108






SOLAR HEATING AND COOLING DEMONSTRATION PROGRAM
MONTHLY REPORT
HOT WATER SUBSYSTEM


SCLAR/2018-79/04


SITE: REEDY CREEK
REPORT PERIOD: APRIL,1979


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
SUM
AVG
NBS


HOT
WATER
LOAD
MILLION
BTU
-0.000
0.008
0.011
0.003
0.008
0.008
0.001
0.000
0.007
0.009
0.011
0.009
0.000
0. 000
0.008
0.015
0.012
0.010
0.000
0.000
0.010
0.009
0.009
0.006
0.013
0.000
0.000
0.012'
0.191
0.006
Q302


SOLAR
FR.OF
LOAD
PER
CENT
100
100
100
100
100
100
100
0
100
100
100
1O

0
100
100
100
100
0
0
100
100
100
100
100
0
0
100


100
N300


SOLAR
ENERGY
USED
MILLION
BTU
-0.000
0.008
0.011
0.003
0.008
0.008
0.001
0.000
0.007
0.009
0.011
0.009
0.000
0.000
0.008
0.015
0.012
0.010
0.000
0.000
0.010
0.009
0.009
0.006
0.013
0.000
0.000
0.012
0.191
0.006
Q300


AUX
THERMAL
USED
MILLION
BTU
N
0
T
A
P
P
L
I
C
A
B
L
E


OPER
ENERGY
MILLION
BTU
N
0
T
A
P
P
L
I
C
A
B
L
E













N.A.
N.A.
Q303


AUX
ELECT
FUEL
MILLION
BTU
N
0
T
A
P
P
L
I
C
A
B
L
E


N.A.


N.A.
Q305


AUX
FOSSIL
FUEL
MILLION
BTU


N.A.
N.A.

Q306


ELECT
ENERGY
SAVINGS
MILLION
BTU
-0.000
0.008
0.011
0.003
0.008
0.008
0.001
0.000
0.007
0.009
0.011
0.009
0.000
0.000
0.008
0.015
0.012
0.010
0.000
0.000
0.010
0.009
0.009
0.006
0.013
0.000
0.000
0.012
0.191
0.006
Q311


FOSSIL
ENERGY
SAVINGS
MILLION
BTU
N
0
T
A
P
P
L
I
C
A
B
L
E


N.A.
N.A.
Q313


* DENOTES UNAVAILABLE DATA.
@ DENOTES NULL DATA.
N.A. DENOTES NOT APPLICABLE DATA.


N.A.

N.301
Q301


SUP.
WAT.
TEMP
DEG
F
70
70
70
70
70
70
70
70
70
70
70
70
70
70
70
70
70
70
70
70
70
70
70
70
70
70
70
70
70

70

N305


HOT
WAT.
TEMP
DEG
F
70
111
139
130
128
135
127
122
129
131
136
142
145
145
137
137
134
131
132
132
128
131
124
128
137
138
138
130


130
N307


HOT
WATER
USED
GAL
2
15
21
6
17
17
2
0
13
21
21
17
0
0
16
27
21
18
0
0
20
18
22
13
25
0
0
26
383
13
N308






SOLAR HEATING AND COOLING DEMONSTRATION PROGRAM
MONTHLY REPORT
SPACE HEATING SUBSYSTEM


SITE: REEDY CREEK
REPORT PERIOD: APRIL,1979


SOLAR/2018-79/04


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
SUM
AVG
NBS


SPACE
HEATING
LOAD
MILLION
BTU
0.000
0.035
0.000
0.000
0.000
0.197
0.000
0.000
0.032
0.000
0.000
0.000
0.000
0.000
0.009
0.137
*
0.000
0.000
0.000
0.000
0.036
0.000
0.000
0.000
0.000
0.000
0.000
0.000

0.477
0.016
Q402


SOLAR
FR.OF
LOAD
PCT
-I
0
100
0
0
0!
100
0
0
100
0!
*
0
0
0
0
100
100
0
01
0
0
100
0
0l
0;
0
0
0
0
--~

100
N400


SOLAR
ENERGY
USED
MILLION
BTU
0.000
0.035
0.000
0.000
0.000
0.197
0.000
0.000
0.032
0. 000
0.000
0.000
0.000
0.000
0.009
0.137
*
0.000
0.000i
0.000
0.000
0.036
0.000
0.000,
0.000
0.000
0.000
0.000
0.000
0.477

0.016
Q400


AUX
THERMAL
USED
MILLION
BTU
N
0
T
A
P
P
L
I
C
A
B
L
E


OPER
ENERGY
MILLION
BTU
0.000
0.010
0.000
0.000
0.000
0.023
0.000
0.000
0.010
*
0.000
0.000
0.000
0.000
0.000
0.004
0.022
*
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.085
0.003
Q403


AUX
ELECT
FUEL
MILLION
BTU
N
0
T
A
P
P
L
I
C
A
B
L
E













N.A.
N.A.


AUX
FOSSIL
FUEL
MILLION
BTU
N
0
T
A
P
P
L
I
C
A
B
L
E













N.A.
N.A.
Q410


ELECT
ENERGY
SAVINGS
MILLION
BTU
0.000
0.012
0.000
0.000
0.000
0.075
0.000
0.000
0.000
*
0.000
0.000
0.000
0.000
0.0001
0.003
0.051
*
0.000
0.000
0.000
0.000
0.012
0.000
0.000,
0.000
0.000
0.000
0.000
0.000
0.175
0.006
0415


FOSSIL
ENERGY
SAVINGS
MILLION
BTU
N
0
T
A
P
P
L
I
C
A
B
L
E













- -----I
N.A.
--ni
N.A.
Q417


* DENOTES UNAVAILABLE DATA.
@ DENOTES NULL DATA.
N.A. DENOTES NOT APPLICABLE DATA.


i


BLDG
TEMP
DEG.
F
75
75
77
77
74
70
68
72
75
*7
77
77
77
79
78
721
70
73
73
75
731
73
74
74
74
751
76
74
74


741
N4061


AMB
TEMP
DEG.
F
74
76
77
77
72
68
69
73
74
*
79
79
79
78
78
72
72
*
75
76
75
73
74
70
71
75
76
75
76
74


75
N113


N.A.
N.A.
Q401






SOLAR HEATING AND COOLING DEMONSTRATION PROGRAM
MONTHLY REPORT
SPACE COOLING SUBSYSTEM


SOLAR/2018-79/04


SITE: REEDY CREEK
REPORT PERIOD: APRIL,1979


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
SUM
AVG
NBS


SPACE
COOLING
LOAD
MILLION
BTU
0. 000
0.597
0.5001
0.573
0.294
0.562
0.000
0.000
0.058
*
0.750.
0.288
0.644
0.000
0.000
0.059
0.062
*
0.696
0.625
0.000
0.000
0.604
0.489
0.302
0.991
0.288
0.000
0.000
0.748
9.781
0.326
Q502


SOLAR
FR.OF
LOAD
PCT

0
100
79
71
71
100
0
0
100
92
68
40
0
100
100
100
100
0
0
100
85
100
33
80
0
0
100
33



81
N500


SOLAR
ENERGY
USED
MILLION
BTU
0.000
0.000
1.276
0.000
0.000
2.123
1 241
0.115
0.718
*
0.000
0.004
1.400
0.000
1.583
1.030
1.107
0.877
0.073
0.870
0.000
0.000
0.000
0.000
0.000
0.000
0.360
1.470
0.000
15.264
0.509
Q500


OPER
ENERGY
MILLION
BTU
0.000
0.119
0.242
0.078
0.059
0.333
0.283
0.121
0.117'
*1
0.122
0.048
0.232
0.000
0.2251
0.231
0.186
*
0.233
0.123
0.119
0.000!
0.113
0.118
0.092
0.151
0.067
0.000
0.156
0.117'
3.949
0.132
Q503


AUX
THERMAL
USED
MILLION
BTU
0.000
0.000
0.105
0.167
0.086
0.000
0.000
0.000
0.000
0.062
0.391
0.384
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.074
0.000
0.668
0.058
0.000
*



0.000
0.000
.81000
0.000
00001
0.074
0.000
0.668
0.058
0.000
0.000
0.000
1.817
0.060
Q501


AUX
FOSSIL
FUEL
MILLION
BTU
N
0
T
A
P
P
L
I
C
A
B
L
E


AUX
ELECT
FUEL
MILLION
BTU
0.000
0.000
0.042
0.067
0.034
0.000
0.000
0.000
0.000
0.025
0.036
0.154
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.030
0.000
0.267
0.023
0.000
0.000
0.000
0.727
0.000
0.030
0.000
0.267
0.023
0.000
0.000
0-000
0.727
0.024


EL ECT
ENERGY
SAVINGS
MILLION
BTU
0.000
0.212
-0.013
0.150
0.073
0.005
-0.283
-0.121
-0.088
*
0.254i
0.072
-0.052
0.000
-0.225
-0.203
-0.155
*
0.125
0.202
-0.119
0.000
0.211
0.145
0.103
0.112
0.081
0.000
-0.156
0.270
0.643
0.021
Q512


FOSSIL
ENERGY
SAVINGS
MILLION
BTU
N
0
T
A
P
P
L
I
C
A
B
L
E


N.A.
N.A.
Q514


* DENOTES UNAVAILABLE DATA.
@ DENOTES NULL DATA.
N.A. DENOTES NOT APPLICABLE DATA.


N.A.
N.A.
Q508


BLDG
DRY
BULB
TEMP
F
75
75
77
77
74
70
68
72
75
77
77
77
77
79
78
72
70
*
73
73
75
73
73
74
74
74
75
76
74
74


74
N406
I ---


AM
TEMP
DEG
F
74
76
77
77
72
68
69
73
74
7
79
79
79
78
78
72
72
*
75
76
75
73
74
70
71
75
76
75
76
74


75
N113
/---

Nl113






SOLAR HEATING AND COOLING DEMONSTRATION PROGRAM
MONTHLY REPORT
ENVIRONMENTAL SUMMARY


SOLAR/2018-79/04


SITE: REEDY CREEK
REPORT PERIOD: APRIL,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
2Z
23
24
25
26
27
28
29
30
SUM
AVG
NBS ID


TOTAL
INSOLATION
BTU/SQ.FT
1464
1588
1512
1564
913
2200
2187
1998
1429
*
1926
1633
1727
1426
2120
2235
2203
*
2095
1997
1650
1450
1534
198
531
1732
1741
1631
2148
1138
49252
1642
QO01


DIFFUSE
INSOLATION
BTU/SQ.FT
681
468
653
569
421
152
123
251
652
*
664
542
633
640
323
197
193
*
303
376
601
597
774
147
413
532
729
720
355
779
14452
482


AMBIENT
TEMPERATURE
DEG F
74
76
77
77
72
68
69
73
74
*
79
79
79
78
78
72
72
*
75
76
75
73
74
70
71
75
76
75
76
74


75
N113


RELATIVE
HUMIDITY
PERCENT
N
0
T
A
P
P
L
I
C
A
B
L
E


DAYTIME
AMBIENT
TEMP
DEG F
82
83
85
84
79
76
81
83
83
*
85
86
85
84
86
81
83
*
85
86
86
79
81
70
74
82
84
83
87
83


82


WIND
DIRECTION
DEGREES
N
0
T
A
P
P
L
I
C
A
B
L
E


WIND
SPEED
M.P.H.
N
0
T
A
P
P
L
I
C
A
B
L
E


N.A. N.A.
N115 N114


* DENOTES UNAVAILABLE DATA.
@ DENOTES NULL DATA.
N.A. DENOTES NOT APPLICABLE DATA.


N.A.
-----------







SOLAR HEATING AND COOLING DEMONSTRATION PROGRAM


MONTHLY REPORT
THERMODYNAMIC CONVERSION EQUIPMENT


SCLAR/2018-79/04


SITE: REEDY CREEK
REPORT PERIOD: APRIL,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
SUM
AVG


EQUIPMENT
LOAD
MILLION
BTU
0.000
0.000
0.798
0.000
0.000
1.277
0.601
0.031
0.353
*
0.000
-0.004
0.835
0.000
0.730
0.653
0.729
0.676
0.126
0.591
0.000
0.000
0.000
0.000
0.000
-0.007
0.167
1.018
0.010
9.197
0.307


THERMAL
ENERGY
INPUT
MILLION
BTU
0.000
0.000
1.276
0.000
0.000
2.123
1.241
0.115
0.718
*
0.000
0.004
1.400
0.000
1.583
1.030
1.107
*
0.877
0.073
0.870
0.000
0.000
0.000
0.000
0.000
0.000
0.360
1.470
0.000
15.264
0.509


OPERATING
ENERGY
MILLION
BTU
0.000
0.000
0.157
0.000
0.000
0.193
0.283
0.121
0.087
*
0.000
0.001
0.145
0.000
0.225
0.199
0.155
*
0.125
0.023
0.119
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.156
0.000
2.132
0.071
--- -


ENERGY
REJECTED
MILLION
BTU
0.000
0.000
2.256
0.000
0.000
3.661
1.862
0.027
1.093
*
0.000
0.000
2.327
0.000
2.384
1.836
1.945
1.845
0.336
1.567
0.000
0.000
0.000
0.000
0.000
0.000
-0.373
2.681
0.000
25.123
0.837


* DENOTES UNAVAILABLE DATA.
@ DENOTES NULL DATA.
N.A. DENOTES NOT APPLICABLE DATA.
NOTE:


COEFFICIENT
OF
PERFORMANCE
(SEE NOTE)

0.000
0.000
0.625
0.000
0.0OC
0.602
0.485
0.272
0.492
*
0.000
-1.203
0.596
0.000
0.461
0.634
0.659
*
0.770
1.725
0.679
0.000
0.000
0.000
0.000
0.000
0.000
0.465
0.693
0.000
0.603
0.020







SOLAR HEATING AND COOLING DEMONSTRATION PROGRAM
MONTHLY REPORT
AUXILIARY STORAGE PERFORMANCE


SOLAR/2018-79/04


SITE: REEDY CREEK
REPORT PERIOD: APRIL,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
SUM
AVG


ENERGY
TO
STORAGE
MILLION
BTU
0.000
0.592
0.395
0.405
0.208
0.562
0.000
0.000
0.058
0.689
0.197
0.259
0.000
0.000
0.059
0.062
*
0.696
0.625
0.000
0.000
0.604
0.414
0.302
0.323
0.231
0.000
0.000
0.748
7.959
0.265


ENERGY
FRO'
STORAGE
MILLION
BTU
0.000
0.000
0.798
0.000
0.000
1.277
0.601
0.031
0.353
*
0.000
-0.004
0.835
0.000
0.730
0.653
0.729
*
0.676
0.126
0.591
0.000
0.000
0.000
0.000
0.000
-0.007
0.167
1.018
0.010
9.197
0.307


INCREASE
IN STORED
ENERGY
MILLION
BTU
0.034
0.598
-0.422
0.321
0.198
-0.758
-0.823
0.116
0.718
*
-0.045
0.224
-0.553
0.037
-0.837
0.142
0.041
*
0.168
0.609
-0.642
0.022
0.650
0.261
0.227
0.149
0.093
-0.105
-1.302
0.676
-0.216
-0.007
----- ]


STORAGE
AVERAGE
TEMP
DEG F

54
58
61
58
62
60
51
44
50
*
58
61
60
56
53
48
49
52
56
57
52
56
62
65
67
69
70
60
56


* DENOTES UNAVAILABLE DATA.
@ DENOTES NULL DATA.
N.A. DENOTES NOT APPLICABLE DATA.


STORAGE
EFFICIENCY



1.000
1.000
1.023
1.000
1.000
1.034
1.369
-3.716
-1.871
*
1.000
6.256
0.973
1.000
1.148
-0.128
0. 029
*
0.782
0.126
1.087
1.000
1 000
1.000
1.000
1.000
-18.482
0.625
1.280
7.159


0.889













UNIVERSITY OF FLORIDA

3 1262 09052 699611 111
3 1262 09052 6996

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