Principles of Dormitory System Design 
1. The hot water system adopts a combination of air source heat pump units and solar collection systems. (m2*a )、 The solar energy guarantee rate is set at 2. The air source system adopts direct heating and forced circulation heating methods. The solar irradiance is set at 4500MJ/45%, with a designed hourly hot water volume of 128m3/h and a maximum daily hot water volume of 64.00m3/d. According to the heat pump working for 12 hours per day, the heating capacity of the heat pump group is designed to use 4 air source heat pumps with a capacity of 304 KW and a single heating capacity of 760kw. The foundations of each equipment should be equipped with soundproofing and vibration isolation measures such as elastic village mats. 
3. The solar system adopts a forced circulation heating method, and the average temperature of the coldest month in the area where this project is located is>10 ° C, so the auxiliary heat source is not mentioned. 50 tube horizontally inserted all glass vacuum tube solar collector. Solar energy collection accounts for 52%. When installing the actual equipment in this project, the final amount of heat generated by the solar collector thermal system that meets the maximum daily heat consumption and the percentage of hot water supply should be determined based on factors such as the actual installable roof area and the performance of the selected manufacturer's products. 
One stainless steel finished hot water tank with an effective capacity of 70m3; The water tanks are insulated with polyurethane foam on site, and the hot water pipes are insulated with insulation materials with a performance level not lower than B1. 
The solar collection system adopts temperature difference control, which is much higher: 
）When B-T ≥ Δ t1, the solar forced circulation pump starts, A 
T1 takes 5-8 ° C; 
）When 3-T1 ≤ Δ t2, the solar forced circulation pump starts At1 takes 1-3 C: 
3) When T1 ≥ 60 ° C, the solar circulation pump is turned off: 
）When T2<55'C, the air source circulation pump starts and the air source heat pump hot water unit starts: 
5) When T2>55C, the air source circulation pump and air source heat pump hot water unit are turned off. 
6. After 17:20 pm every day (time adjustable), when T1 measures that the water temperature is lower than the set temperature, the air source circulation pump is turned on, and the air source heat pump hot water unit is started for circulating heating to increase the water temperature of the hot water storage tank. When the temperature reaches the set temperature, T1 sends a control signal and the air source circulation pump and air source heat pump hot water unit are turned off. 7. The design value of the bearing capacity of the anchoring nails between the connecting parts of the solar hot water system and the main structure should be greater than the design value of the bearing capacity of the connecting body itself. The building where solar collectors are installed should be equipped with safety facilities to prevent components from falling and injuring people after the collector is damaged. 
8. The solar hot water system should adopt technical measures such as antifreeze, anti condensation, anti overheating, anti electric shock, lightning protection, hail resistance, wind resistance, and earthquake resistance. 
9. All electrical equipment used in solar hot water systems should be equipped with short-circuit protection and ground fault protection devices.