5. Constant temperature field of agricultural greenhouse
For the vegetable greenhouse and fruit in the severe cold area, because the outdoor temperature is quite low and the outer wall structure of the vegetable greenhouse is not good, the outdoor cold air will enter the greenhouse through conduction, resulting in the low indoor temperature and affecting the growth of vegetables. If the greenhouse is not heated, it will directly affect the economic income of farmers. Therefore, the long-term use of coal-fired hot air in these areas Furnace, heating furnace and other equipment, not only high energy consumption, pollution, temperature can not be sustained. With the implementation of energy conservation, emission reduction and low-carbon economic policies, this kind of equipment has been banned.
6. Commercial hot water
In addition to the northern coal to electricity heating project, the commercial hot water transformation market has sprung up, especially in the northern region. More and more hot water renovation projects of hotels and guesthouses have become "new battlefields". While the government is implementing the coal to clean energy heating, the transformation of commercial hot water projects is also making efforts.
After "coal to electricity", most customers are most concerned about whether the actual cost will reduce their profits after the heat source is changed. We can comprehensively analyze its operation cost. Assuming that the daily passenger flow of a bathing center is about 300, the design temperature of cold water is 4 ℃, the maximum design water supply of hot water is 55 ℃, and the design water consumption of each person is 50L, the daily water consumption is about 15t.
Considering the unit performance and the actual market competition environment, two 10p air energy heat pump units are selected as the heat source. In addition, 36kw electric auxiliary heating is added for maintenance or start-up at low temperature. In the actual control, the water temperature control method is used to start and stop the electric auxiliary, and the water temperature is lower than 42 ℃ to start operation (closed in spring, summer and Autumn).
According to the actual calculation of local engineering companies in the past years, the average operation cost of 150 days in winter is about 16 yuan / ton of water (including the main engine and circulating pump, excluding the water supply booster pump). The comprehensive cost of spring, summer and autumn is 11 yuan / ton, so the annual average hot water cost is 13.5 yuan / ton.
Although the data can not fully reflect all the operation data, it can reflect the main operation cost of the system from a macro perspective. Air energy heat pump hot water can realize intelligent management throughout the year, the system runs automatically, there is no high-risk equipment such as pressure vessels, and the safety performance is stronger than that of boilers.