In recent years, with the development of air-source heat pump technology, its products have gradually spread to the civil field, especially the implementation of coal to electricity in the north. Many residents choose air-source heat pump for household heating. Before selecting the air source heat pump, customers are more concerned about the following questions: "Is the operating cost of air source heating high?" and "How much does air source heat pump heating cost per day?".
Before analyzing the heating cost of heat pump, it is necessary to understand what factors affect the heating efficiency of air source heat pump. For this reason, Kcalin consulted the heads of the R&D Department and the laboratory and summarized the following three main factors for your reference.
1. Unqualified air source heat pump system
The rapid development of the air source heat pump market has attracted many non-technical manufacturers to enter, and various assembly machines have flooded the market, attracting attention at low prices. There is no problem with the daily use of such products, but the energy efficiency value is more than 10% lower than that of mainstream products; At the same time, in order to reduce costs, the use of miscellaneous accessories often causes defrosting shutdown, low temperature shutdown and other failures; This will increase the energy consumption of the unit and affect the stability and service life of the unit.
2. Different terminal heating systems
Different heating modes also have an important impact on the operation cost. For example, under the same conditions, the energy efficiency of the air source heat pump using the ground heating terminal is 0.6-1 higher than that of the system using the radiator; Higher energy efficiency ratio means that the same heating effect can be achieved with less consumption; The difference in power consumption between the two may be 50% or more.
3. Thermal insulation performance of houses
The thermal insulation performance of the house is also an important indicator that affects the energy consumption of the air source heat pump heating system. Just like a thermos, a good thermos can still have a temperature of 60 or 70 after three days of boiling water, while a poor thermos will cool the next day. In the same way, the air source heat pump of a house with good insulation can maintain the indoor temperature up to the standard by working for 6-8 hours every day, while the air source heat pump of a house with poor insulation may need to work for more than 12 hours, which greatly increases energy consumption.
How much is the cost of air source heat pump heating?
Take the air source heat pump central heating project of a residential district in Weifang City, Shandong Province as an example. The residential district has a building area of 86000 ㎡, a heating area of 66000 ㎡, and the terminal heating form is floor heating. The average winter temperature in Weifang is - 9 ℃ and the relative humidity is 63%. According to the load calculation, the equipment is selected as 26 STS air source heat pump units S-90 and 2 circulating water pumps. The total power consumption in a heating season is 1.424 million kilowatt-hours, the annual operating cost is 669000 yuan, and the operating cost of the air source heat pump heating system is 16.1 yuan/(㎡ · heating season).