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Block Card 4709 South Avenue
No full textThis image was produced by the Auditor's Office in Lucas County, Ohio for tax assessment purposes. Associated dates are approximate. Descriptive terms related to this photograph include: Ranch houses | 4709 South Avenue (Toledo, Ohio) | Dwelling | Adams Township Area (Toledo, Ohio
4709. Chronique de Lorraine
No full text4709. Chronique de Lorraine. In: Molinier Auguste. Les Sources de l'histoire de France - Des origines aux guerres d'Italie (1494). V. Introduction générale - Les Valois (suite), Louis XI et Charles VIII (1461-1494) Paris : A. Picard et fils, 1904. pp. 36-37
Bewertung der Primärenergieeinsparung von Mikro-BHKW nach DIN 4709
No full textDie Wirkungsgrade ("Normnutzungsgrade") nach DIN 4709 bilden den praktischen Betrieb von Mikro-Blockheizkraftwerken besser ab. Insbesondere bei den thermischen Wirkungsgraden ergeben sich nach DIN 4709 geringere Werte im Vergleich zu stationären Messungen aufgrund der An-/Abfahrverluste und der Speicherverluste. Der Betrieb des Zusatzkessels führt zu einer Reduktion der Primärenergieeinsparung der Gesamtanlage
4709. Chronique de Lorraine
No full text4709. Chronique de Lorraine. In: Molinier Auguste. Les Sources de l'histoire de France - Des origines aux guerres d'Italie (1494). V. Introduction générale - Les Valois (suite), Louis XI et Charles VIII (1461-1494) Paris : A. Picard et fils, 1904. pp. 36-37
Block Card 4709 Monac Drive
No full textThis image was produced by the Auditor's Office in Lucas County, Ohio for tax assessment purposes. Associated dates are approximate. Descriptive terms related to this photograph include: Ranch houses | 4709 Monac Drive (Toledo, Ohio) | Dwelling | Greenbush Knolls Addition (Toledo, Ohio) | Trilby Area (Toledo, Ohio)
Experimental determination of efficiency factors for different Micro-CHP units according to the standard DIN 4709
No full textSince November 2011 the standard DIN 4709 stipulates performance tests for Micro-CHP units in Germany. In contrast to steady state measurements of the CHP unit itself, the test according to DIN 4709 includes the thermal storage tank as well as the internal control unit, and it is based on a 24 h test cycle following a specified thermal load profile. Hence, heat losses from the storage tank are as well taken into account as transient losses of the CHP unit. In addition, the control strategy for loading and unloading the storage tank affects the test results.
The DIN 4709 test cycle has been applied at the test stand for Micro-CHP units at Reutlingen University, and results for the Micro-CHP unit WhisperGen and the EC Power units XRGI 15® and XRGI 20® are available. During the analysis a method has been developed to evaluate the results in case the test cycle does not end in a time slot between 24 and 24.5 h after the starting as demanded by DIN 4709. Since this method has been successfully applied to the test of various CHP units of different size and technology so far, it is suggested to incorporate it to DIN 4709 during the next revision of the standard.
The performance numbers obtained reveal the differences in efficiencies measured at steady-state on the one hand and following the DIN 4709 test cycle on the other hand. While the deviations in electrical efficiencies are small, thermal efficiencies according to DIN 4709 fall below steady state data by 3–6 percentage points. This is attributed to transient thermal losses and heat losses from the storage tank, which are not included in steady state and separate testing of the CHP unit, only
Abschlussbericht - Bioenergie Regionen Stärken (BEST) ‐ Teilprojekt Schwachholzpotenzial Wald (IO-H4)
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