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Calculate system effort number Ep for heat pumpThe number of plant consumptions is an essential criterion when using heat pumps. Heat pumps are currently the tool of choice when it comes to heating and hot water. The system effort figure determines how much energy has to be expended in order to obtain the desired benefit from the heat pump.
The heat pump is powered by electricity. Likewise, the auxiliary drives also have a drive by electricity. Now you have to know what value the system cost has. It is an essential part of the evaluation of a heat pump according to EnEV (Renewable Energy Ordinance).
What role does the number of plant expenditures play?
Determining the number of plant outlay is not that easy. Although there is a formula -wp = 1 / β (5) -, which can also read in the DIN 4701-10 and in the VDI 2067, but that's not enough.
Presumably, you will only learn that the system cost is the reciprocal of the annual work count. The annual work figure, on the other hand, is very
real value. It states how much electricity was consumed during one year and how much heat was ultimately produced. Thus, this number is actually much more meaningful than the number of plants, but before installing a heat pump, no actual value can be used. Therefore you have to use the equipment cost for a review.
What has influence on the number of plant consumptions?
Many factors play a role in determining the number of plant outlay. The coefficient of performance of the heat pump must be known, for example. Also, the temperature of the heat source at the design point is important.
Great attention continues to be paid to the temperature differences between flow and return. These are examined in the most different situations. Furthermore, the electrical energy required per year for operating the heat source pump is decisive for the number of plant outlay.
By forecasting the number of plant expenditures one can draw conclusions regarding the efficiency of a heat pump. Such calculations are necessary in order to be able to determine in the first place whether the use of a heat pump makes sense and, if so, which heat pump must be used.