We offer a complete range of flanges for use with OD tube and nominal bore pipe in carbon steel and stainless steel to tables D, E, F, and H. Specials can be manufactured to customers' special requirements. We offer different surface treatment, such as galvanized flanges. Galvanized Flange,Pipe Flanges,Electro Galvanized Flanges,Galvanized Plate Flanges Shandong Zhongnuo Heavy Industry Co.,Ltd. , https://www.znforged.com
Abstract: In this paper, a ground source heat pump project in a hotel is taken as an example. Based on the design and engineering application of the host computer, a brand new model of energy utilization is recommended in order to meet the increasingly comfortable living environment and the concept of energy saving. Keywords: modular, ground source heat pump, total heat recovery, domestic hot water, energy saving First, the general situation of the project: Bazhou air-conditioning project in a hotel, requirements: Summer: air conditioning in the hotel room to achieve cooling, Water, for guest guest bathing and other requirements. Winter: Room air conditioning to meet the heating requirements, while providing hot water. Second, the project selection: The host selection of all heat recovery modular ground source heat pump units, engineering design provided by the host program. Third, the host of technical analysis: As we all know, ground-source heat pump units in recent years countries have been vigorously promoting the energy-saving air-conditioning typical representatives, due to its high efficiency and energy saving, especially in the northern region, more and more widely used. However, although its efficient, but to view the sample data of major air-conditioning manufacturers at home and abroad, the cooling coefficient of performance can only be up to 5.0 ~ 5.5, such as to re-increase the cost of a large cost, and it is in the summer for air-conditioned cooling conditions When the heat generated in vain was brought back to the ground. At the same time, people are demanding more and more applications of modern air conditioners. For example, in this case, it is necessary to provide domestic hot water while cooling a room in the summer. In response to the above two cases, we have developed a new type of energy-saving air-conditioners that not only wastes the heat generated by ground-source heat pumps in summer but also meets people's demand for hot water. Heat pump. Its first two advantages As mentioned above, the third advantage it has is energy saving: the traditional evaluation of air conditioning energy savings is based on two factors, the coefficient of refrigeration performance EER and the coefficient of heating energy efficiency COP, while for total heat recovery Ground source heat pump performance evaluation needs to rely on "COU", the value of COU generally can be 6.3 ~ 6.5, much higher than 5.0 ~ 5.5, is the energy to make full use of the real energy saving. Fourth, equipment selection and control: 1, equipment selection: According to the characteristics of the use of buildings, our company recommends that your company uses the following air conditioning and hot water programs: air-conditioning host modular heat pump unit + heat recovery module Ground source heat pump unit as the supply of hotel air conditioning and hot and cold water supply. Mode of operation: the summer unit cooling operation, all heat recovery unit in the cooling at the same time for the hotel to provide free full hot water supply; winter modular ground source heat pump unit heating operation, heat recovery unit to provide domestic hot water, guaranteed Under the premise of hot water supply both indoor heating. 2, the program's superiority: (A), in the summer can save the cost of all living hot water, even in winter operating costs are extremely low, the hotel can save extraordinary operating costs every year; (B), the unit can be installed in (3) According to the progress of the project and put into operation in different stages of installation of the host into the installation capacity is conducive to the rational use of project funds, Avoid idle air conditioning equipment occupy a lot of money; (d), no cooling water system, eliminating the cooling tower, water pump and cooling water piping system investment and installation work, saving the cost of this operation in peacetime to save a lot of Cooling water consumption; (5) High degree of automation, wide range of load regulation, better compliance with regulation under different seasons and loads, and unparalleled load trialability of conventional central air conditioners, with obvious energy saving. Especially in the night, over the season, when the low load is more obvious; (vi) single machine vibration and noise is small, the impact on the building is small, such as design, installation and handling of good use of the building will not cause any impact; , The heat recovery system uses a circular, small changes in temperature of inlet and outlet water, small temperature difference, large flow; (eight), in the season without cooling, hot water unit circulating groundwater, there is no evaporator minimum water flow problems. 3, the system diagram: 4, the control system: As most of the current heat recovery unit, are added to its standard unit of a heat recovery unit derived from its own control system without any changes, it will only be based on cold Load changes to adjust the performance of the unit, without the hot water temperature control. Control of hot water flow and temperature control, the scope of the control include: cooling water pump start and stop; hot water flow control (domestic hot water); hot water temperature control; auxiliary heater control (electric heating, boiler); Hot water pump control and so on. 5, The project control is divided into the following situations: 1) During the daytime, the unit receives full heat recovery during normal daylight hours, but the hot water storage tank reaches the required 45 ℃, and the unit still needs to be cooled. According to the method: a, hot water control system to switch the electric three-way valve 1,2 chilled water into the room; tank water temperature and water up to the requirements, electric three-way valve 3,4 switch the unit cooling water access to the tank, Circulating hot water in the water tank; b, the water temperature and water in the water tank have reached the set parameters, the electric three-way valve 3,4 switch unit cooling water access well system. 2), indoor without refrigeration, but the hot water tank water temperature and water requirements. According to the method: hot water control system cut electric three-way valve 1, 2 chilled water access well system, the electric valve 3,4 switch the chilled water access to the tank, circulating hot water tank, water tank temperature And the water volume have reached the set parameters, the electric three-way valve 3,4 switch unit cooling water access well system. 3) When winter indoor heating needs. According to the system method: heat recovery unit water system electric three-way valve 1, 2 switching unit chilled water access well system. Electric three-way valve 3,4 to the unit cooling water access to the hot water tank, circulating hot water in the tank. 4) When winter indoor heat demand increases. According to the system method: heat recovery unit water system electric three-way valve 1, 2 switching unit chilled water access well system. When the water temperature and water in the tank reaches the set parameters, the electric three-way valve 3 and 4 connect the cooling water of the unit to the indoor pipe to supplement the indoor heat load. V. Conclusion This project uses our newly developed energy-efficient modular ground-source heat pump unit and with the company's supporting domestic hot water control module system together to ensure the indoor cold and heat load supply and domestic hot water needs.