The Joint Solar Collector Testing Programme of the European Community

Aranovitch, E.

doi:10.1016/b978-1-4832-8407-1.50193-8

Cited by 7 publications

(5 citation statements)

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“…It should be noted that the low frequency drift of q u (t) or AT el due to slowly varying irradiation can lead to errors in the efficiency calculation using equation 9. A criterion was introduced by Aranovitch (1977), which accepted the data as a quasi-steady one when dT e (t) dt < 12°C/hr.…”

Section: Methods Of Efficiency Calculationmentioning

confidence: 99%

An Automation of Collector Testing and Modification of ANSI/ASHRAE 93-1986 Standard

Huang

Hsieh

1990

Journal of Solar Energy Engineering

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The steady-state performance test of solar collectors using ANSI/ASHRAE 93-1986 Standard was revised and an automation for the testing was carried out in the present study in order that the test can be easily performed outdoors in areas with variable weather conditions. It was shown that the 95 percent settling time of the collector τ95 can be adopted as the time basis in the selection of steady-state period for the test. To make the best use of the time available for the testing, the steady-state period defined by ANSI/ASHRAE 93-1986 Standard was changed to the τ95 plus five minutes, or ten minutes, whichever is larger. To reduce scatter uncertainty in the test results, the test period for the efficiency calculation was chosen as the segment of the last five minutes in the steady-state period and a steadiness condition defined statistically was adopted. To shorten the time for each test run a PC-based expert testing system, which is completely automatic and requires no operator, was developed in the present study. Using this expert system associated with the modified ANSI/ASHRAE 93-1986 Standard, we can effectively carry out the collector test at variable weather conditions with small scatter uncertainty and can substantially shorten the duration of a test.

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Section: Methods Of Efficiency Calculationmentioning

confidence: 99%

An Automation of Collector Testing and Modification of ANSI/ASHRAE 93-1986 Standard

Huang

Hsieh

1990

Journal of Solar Energy Engineering

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“…(A) One-Node Method Documentation on this method can be found in Arranovitch, 1977;Munroe, 1983;Saunier and Chungpaibulpatana, 1983;Stronskii et al, 1986;Chungpaibulpatana and Excell, 1988, 1990a, 1990bPerers, 1993Perers, , 1997Souproun, 1992;Muschaweck and Spirkl, 1993;Bosanac et al, 1994;Spirkl et al, 1997;Zeroul et al, 1994;Wijeysundera et al, 1996;Amer et al, 1998bAmer et al, , 1999 (B) Multi-node method Documentations on this method can be found in Wijeysundera and Hawlader, 1984;Kamminga, 1985aKamminga, , 1985bHawlader and Wijeysundera, 1987;Frid, 1990. (C) Response function method Documentation on this method can be found in Rogers, 1981;Emery and Rogers, 1984;BS 7657, 1986;Wang et al, 1987.…”

Section: Solar Collector Methodologymentioning

confidence: 99%

“…The conductive heat gain through the walls/roofs can be calculated using conductive heat inputs for the current hour using time delayed contributions from the previous 23 hours, (2)(3)(4)(5)(6)(7)(8) where = hourly conductive heat gain for the surface, Watts = heat input for the current hour, Watts…”

Section: Calculating Heat Gainsmentioning

confidence: 99%

“…The term in the square brackets on the left-hand side represents an effective heat capacity of the collector and is written as (mC) e. The effective heat capacity of a collector with n covers would be (5)(6)(7) where is the ratio of the overall loss coefficient to the loss coefficient from the cover.…”

Section: Flat -Plate Collector Model Equationmentioning

confidence: 99%

“…5 shows the comparison of the simulation results using the stratified node model to the experimental results. As can be seen from the figure, the stratified tank model, or the multi node model, is in good agreement with the experimental data taken from the literature.As shown inFigure 4.5, initially all thermocouples gave the same reading, which can be seen at the zero hour on the graph, as approximately 82.The temperature readings are then recorded at certain intervals to study the temperature change of the water in the storage tank.…”

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confidence: 99%

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