How to start the campus BOT hot water project

As the heat of the campus BOT hot water project is rising, the campus BOT hot water projects across the country can be said to be a wind-driven phenomenon. With the rise of various campus BOT projects, many powerful heating and HVAC celebrities have begun to set foot in the campus BOT hot water projects.

Although there are rich sources of BOT hot water projects on campus, there are still many businesses who can only watch other big boys' BOT hot water projects on campus busy due to the lack of relevant technical level, and 'peers' are still in full swing in the campus BOT hot water projects.

Once HVAC engineers have such an opportunity to access the campus BOT hot water project, how can they learn relevant information and details from a technical perspective from Party A? I summarized the following points:

1) Actual occupancy of students: each dormitory building is male or female; What level of students live in each dormitory building; Number of dormitories in each dormitory building; Actual occupancy of each dormitory building; How about the seasonal change of the number of residents in each dormitory building (which dormitories are graduation classes and which students often go out for practice); How about school holidays.

2) Actual water demand of each dormitory building: which dormitory buildings need centralized shower through the bathhouse; Which dormitories are buckets of hot water; In which dormitories, hot water should also be provided in the washroom in addition to shower showers; How are the periods of hot water supply distributed? (Colleges and universities generally use regular hot water supply and use water in different periods. In order to reduce the heat dissipation of the pipe network, 24-hour hot water supply should be avoided as far as possible.)

3) The condition of tap water in each dormitory building: the water pressure, water quantity and water quality of each dormitory building, as well as the water charge should be clarified with the school? (After all, you have to pay your own water bills.)

4) Building structure of each dormitory building: try to understand the building structure drawing of each dormitory building with the school party. Except that there are potential safety hazards in the building bearing, the general hot water system should be designed on the roof as far as possible (which can greatly reduce the power consumption of the water supply booster pump and reduce the heat loss of the hot water pipe network); The school should try to provide the contact person of the architectural design unit. If the building must be partially reinforced to bear the load of the hot water system on the roof, the school must coordinate with the school to do a good job, and try to calculate the relevant costs of building reinforcement into the school's investment scope, rather than its own investment.

5) Capacitance of each dormitory building: In the early stage of the project design, communicate with the school about the capacitance of each dormitory building system (it is generally sufficient to transform the electric water heater into air energy), how about the electricity price, and whether to charge according to the stepped electricity price (if there is wave valley electricity price, try to design the energy storage system).

6) Building plan, electrical layout, HVAC drawings and water supply and drainage drawings of each dormitory building: (for the design of hot water pipe network) If relevant design institute can issue hot water pipe network, it is better to issue it through the design institute to avoid corresponding construction risks.

7) Current all-in-one card used by the school: how about the original all-in-one card equipment of the school (to know which water control manufacturers are compatible);

8) Relevant economic factors: the management mode of the school for hot water BOT investment, the number of years of contract signing and the initial charging standard with students.

9) Other matters not covered: learn more about the operation and management of similar projects with the school, and ensure smooth information communication with the school and other parties.

Once HVAC engineers have such an opportunity to access the campus BOT hot water project, they must know the above nine important information when conditions permit. Are they ready to do a lot of BOT? Don't worry about the campus BOT hot water project. Looking at the key factors of all successful campus BOT hot water projects, they should have at least the following three characteristics:

1、 It is very important for campus BOT hot water project to adopt host equipment with excellent performance.

1. The campus BOT hot water project can ensure the stable operation of the hot water system with few host failures and timely after-sales service

2. The host is energy efficient. It can be heated normally at low temperature!

3. After sales service chief of the main engine. The warranty period of the main machine should be as long as possible, which can reasonably reduce the technical risk of BOT hot water investment projects, maximize the cost of maintenance of equipment by investors during the operation of equipment, and maximize the benefits of hot water investment.

2、 The perfect construction and installation of the campus BOT hot water project system is very important.

As the saying goes, "three products and seven installations". The construction and installation of campus BOT hot water projects should pay attention to the following details:

Campus BOT hot water project 1: whether the host water make-up system can be optimized. The make-up water pipe of some systems can be improved. The make-up water is directly added to the circulating water inlet pipe of the main engine. The main purpose is to reduce the water inlet temperature of the main engine, thus improving the energy efficiency of the main engine. It should be noted that for the main engine matching relatively small systems, this change may not be possible (because reducing the water inlet temperature of the main engine, improving the energy efficiency, will also reduce the heating capacity of the main engine);

Campus BOT hot water project 2: whether the installation of outdoor hot water pipeline can be optimized. The construction of hot water pipe network in many projects is not standardized, for example, some pipelines are set in the open air but the insulation is very rough (some projects use very rough rubber and plastic insulation for hot water pipelines, and even use "obsolete" external binding tape for protection). This thermal insulation measure cannot prevent moisture in rainy days, and cannot prevent ultraviolet ray aging and atmospheric oxidation in sunny days. Although the rubber and plastic insulation layer has certain thermal insulation and moisture-proof functions, rubber and plastic are easy to age without good protection measures. Outdoor hot water pipes must have good protective layers added to the rubber and plastic insulation layer, such as aluminum foil, aluminum plate, etc. If the service life and investment level are considered, it is recommended to use PVC composite protective pipes with moderate cost, The construction is simple, and the functions of rain proof, moisture proof, UV protection and oxidation prevention are relatively good [For BOT projects, the protective layer of outdoor insulation pipe should be paid attention to, otherwise the effective service life of rubber and plastic insulation layer will be seriously affected, resulting in the need for multiple investments in reconstruction during the contract period].

Campus BOT hot water project 3: the installation location of the host should be considered. The greening of general school projects is good. The trees at the air outlet of the host may affect the smooth air flow. If the fins of some hosts are sucked into the air side, they are often blocked by leaves, affecting the heat exchange of the host evaporator. Improvement measures: fully communicate with the school to see if the trees can be moved or other measures can be taken to ensure smooth ventilation of the host machine; For those easily blocked by leaves