Similarly, the hourly energy flows and solar fraction
of the system is presented in Figure 7(c).
The objective here is to compare the thermal performance based on solar fraction
of solar thermal and solar PV heat pump systems as a function of collector size and the storage capacity.
The performance criteria includes; coefficient of performance (COP), solar thermal gain, power consumption, and solar fraction
. From this study, it found that solar absorption refrigeration and solar electric compression refrigeration had a high energy saving also have a beast performance.
For example, an extended vacation with nobody home, not enough hot water storage compared to collector area, or a system that overproduces thermal energy in the summer because it is designed to try and produce a high portion of heating needs in the winter--the "solar fraction
An increase of solar fraction
was achieved by installing heat pumps to increase the efficiency of solar collector fields.
Therefore, the total annual solar fraction
of solar energy to the system is about 31%.
Without increased facility costs, variable-rate injection can significantly increase the solar fraction
of an EOR project.
The system is projected to provide an approximate 20% solar fraction
The solarized CC performance was then evaluated in terms of power production penalty, fossil fuel saving and solar fraction
due to solarization (Figure 3--typical Summer day).
The given numbers for the solar fraction
of total heat delivered are simulated values for long-term operation.
DOE is including residential gas condensing water heaters and solar water heaters in the program, with a 0.80 kWh/year Energy Factor and 0.50 Solar Fraction