Abstract
The composition and principle of an air conditioner driven by a quasi grid-connected photovoltaic (PV) system are investigated by analyzing the working principle of quasi grid-connected energy-saving technology. Various aspects, including the PV properties of solar cells, the working principle of storage batteries, the working characteristics of direct current (DC) compressors, and the energy efficiency and economy of solar-powered air conditioners, are considered in the analysis. After an experimental platform is set up, experimental tests are conducted using a conventional air conditioner. Experimental results, as well as the results of the economic analysis based on the experimental platform, reveal that a solar-powered air conditioner can conserve grid electricity by more than 67% and 77% during summer daytime and summer nighttime, respectively. The comprehensive energy efficiency ratio of a solar-powered air conditioner is 4.6 times higher than that of a conventional air conditioner. The air conditioner must run for a maximum of 4h during daytime and 2h during nighttime to maximize its energy-saving ability.
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