Benefit Analysis Of Energy-saving Retrofit Of Oil-fired Boiler By Using Solar Air-cooled Heat Pump In Guangdong Area

Solar heat pump technology is an important branch in the field of solar energy utilization.It combines the two technologies of heat pump and solar energy,enhances the solar energy utilization efficiency and heat pump performance with their respective advantages,resolves the disadvantages of solar energy discontinuity and achieves the goal of efficient solar energy utilization.The present work mainly studies the use of solar energy heat pump technology in the Guangdong area,solve the technical constraints problem of solar hot water systems in Guangdong area;this paper discusses the technical feasibility of solar energy heat pump technology in Guangdong area,and studies energy saving and emission reduction effect of the implementation of the technology base on the affiliated hospital of Sun Yat-sen University energy-saving renovation project case.Firstly,according to the climate data of Guangdong,the needed area of collector for solar energy technology in extreme climate is calculated.The results show that the direct application of solar energy to supply hot water in Guangdong must build a large area of heat collector,which increases the technical difficulty and construction cost.Then,it discusses the application of solar energy heat pump technology in Guangdong area by the energy-saving renovation project of affiliated hospital of Sun Yat-sen university.The project puts forward retrofit scheme of the solar air-cooled heat pump technology with gas hot water boiler to achieve the function of refrigeration,heating and hot water system,and installs the steam generator to meet the system requirements of the steam.The system adopts the intelligent energy management system to realize intelligent control and switch mode.By comparing the main energy consumption and operation performance of the system before and after the case system transformation,the results show that the total energy consumption of the system before the transformation is 200.14 tons of standard coal/month.After the transformation,the energy consumption of the system was converted to 149.57 tons of standard coal/month.It saves 50.57 tons of standard coal/month,equivalent to 411468.69 yuan per month.The total cost of the reconstruction scheme is 19.3464 million yuan,so the static payback period of the transformation of the project is 3.92 years.Before the transformation,the air conditioner power consumption is relatively high,and the performance coefficient of the unit is 4.1 for no.2 water chiller,and 4.7 for no.3 water chiller.The actual operation efficiency of the air conditioning system is low,the operation performance coefficient is low,the working efficiency of the pump is low,the indoor temperature is high,and the energy consumption system fails to achieve the actual cooling effect.The performance coefficient of the two heat pump units after transformation is 7.87 and 8.62 respectively.The load rate of the water chiller is obviously increased,the temperature difference between supply and return water is increased,the operation performance coefficient of the unit is significantly increased,and the heat pump of the hot water system has better operation efficiency.