Pizhou Gold Coast Casino is a comprehensive service facilities more complete hotel hotel, mainly engaged in catering, guest room, entertainment; the entire air-conditioning system, including room air conditioning system, catering, entertainment and other places and independent fresh air pretreatment system. Mainly used for the summer to provide air conditioning with cold water for the hotel in winter to provide heating with hot water and certain health hot water. Since the project was put into operation in February 2007, it has received good results.
First, the groundwater source heat pump and energy storage system integration
1, the main components
Pizhou Gold Coast Entertainment City construction area of ​​7,000 square meters, the groundwater source heat pump and energy storage combined with the system mainly by the hot and cold air conditioning equipment, sanitary water use by the heat pump water chiller units, the freezing station mainly by a water source Screw heat pump hot water unit, air conditioning pump circulation system and other components. Water source screw heat pump hot and cold water consists of two compressors, and this set of 0%, 50%, 75%, 100% four different energy control levels, equipped with eight automatic energy controller to adjust the compressor load Different output, so as to achieve the purpose of energy conservation.
Air conditioning pump circulation system consists of three parallel pumps, respectively, a 185KW, 750KW two. The design maximum load of 670 kilowatts, the design of the total daily cooling capacity of 6097 kilowatts. One 750 kW and one 300 kW (hot water unit provides cooling capacity in summer), with 5 tanks of 600 cubic meters.
2, the working principle and mode of operation
Central air conditioning system is divided into two major cold (hot) source and end systems. The use of underground water temperature (17-18 degrees), so that the temperature air-conditioning units at full load in the low-cost electricity operation, energy reserves, according to the demand for ice storage heat storage for peak use. When heating in winter, the low-grade heat energy in the water is heated by consuming about 20 degrees of electric energy by the heat pump principle, and the extracted heat is used for heating the room. In summer, the heat in the room is released into the groundwater, cooling down 8-10 degrees to meet the requirements. Cold source of refrigeration units to provide 6-8 degrees of cold water or heat 45-50 degrees of hot water supply end system through the end system fan coil, air conditioning and other air handling equipment to achieve cooling and heating purposes, to meet the comfort of the building Air conditioning requirements.
After using the regenerative (cold) air conditioning system, the winter (summer) season can start up the 8 or 10 hours of refrigeration compressors designed and operated in the conventional system to operate at zero after the zero point, and the unit can transfer cold energy (heat) To cold and hot water (cold water) stored in the tank, to meet the daytime peak 70% of the air conditioning load and all the hotel hot water supply, and the unit during the day only need to add about 20% of the air conditioning load, greatly easing the peak electricity Power shortage. In this case, the geothermal air conditioning unit is completely shut down while the electric power only needs to meet part of the air conditioning load and the rest is stored by the amount of heat (cold) to achieve the purpose of "peak cutting and valley filling" to balance the power consumption and reduce the power equipment capacity .
Second, benefit analysis
1, energy-saving: the use of underground water to achieve energy-saving heating effect.
Water source heat pump system is based on shallow groundwater and surface water as a source of heat and heat, as the groundwater in Jiangsu year round to maintain a relatively stable level in winter groundwater temperature is much higher than the ambient temperature, heat pump evaporation temperature increases, the heating coefficient High, generally up to 3.8 ~ 5. In summer, the temperature of soil is lower than that of ambient air, so the condensing temperature is lowered and the cooling coefficient is increased. In the case of primary energy utilization, the efficiency of a typical coal-fired boiler is 80% -90%, while the power generation efficiency is 30% Calculation, the water source heat pump heating coefficient of 4.5, the primary energy utilization rate of 30% × 4.5 = 1.35, are higher than the coal-fired boilers.
Water source heat pump is the use of electricity, electricity is a clean energy, heating the boiler room was saved, no combustion process, no emissions to the atmosphere and the environment, eliminating the need for cooling tower cooling, cooling tower to avoid Noise and water vapor pollution, meanwhile the groundwater takes full recharge and closed loop, does not consume water resources, nor pollutes groundwater resources. To achieve the purpose of saving water resources and protecting the ecological environment.
2, shift peak filling, saving electricity: the use of low trough electricity to reduce operating costs.
Saving energy expenditures is the lifeblood of profits in the service industry. For the protection of the environment, it has become an important part of our country in implementing the scientific concept of development, building a harmonious society and making rational use of energy resources. Guide users economic and rational use of electricity, improve electricity efficiency, is conducive to narrow the power grid peak-valley difference, optimize the structure of electricity. Both to help customers reduce the cost of electricity, but also for the orderly use of electricity and energy efficiency management companies to provide data support, so as to achieve the economic benefits of both power supply and management of a win-win situation.