Innovative Cooling System Optimization with Free Cooling and Heat Pump Technologies
Explore the integration of free cooling and heat pump technologies in a complex cooling system for pharmaceutical production. Learn about the economic efficiency and benefits of each technology under different electricity and natural gas tariffs. Discover the implementation and advantages of this system through in-depth research and analysis.
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Presentation Transcript
COMPLEX APPLICATION OF FREECOOLING AND HEAT PUMP TECHNOLOGIES APR 2024 Perepelytsia Ihor, postgraduate Confidential
The purpose of the work The following tasks were solved Goals the actual data of consumption of energy carriers by cooling systems for enterprises (refrigerator with Freecooling function and heat pump) were investigated to develop an applied methodology for the integrated application of Freecooling technologies and a heat pump in the cooling system of a specific pharmaceutical production based on the application of the criterion of the minimum cost of energy resources, a model of the complex operation of cooling systems was built on the basis of the proposed algorithm and application of the SCADA system, the possibility of automatic control of the operation of the Freecooling and heat pump systems depending on the tariff for electric energy and natural gas was obtained Confidential
Cooling system Freecooling The cooling system consists of TRANE chillers, which are the main source of cooling, equipped with a Freecooling system, a branched system of pipelines, control valves, and a heat pump as an auxiliary source of cooling When the outside temperature is above 5 C, the chillers will operate The Freecooling system, which is a secondary cooling system, will only operate when the outside temperature is below 5 C Aermec heat pump, model WRK0350HL, is designed for heat recovery from the refrigeration circuit. Chiller TRANE RTUB224 2 680 W Consumer of cool 6/12 Heat pump Aermec WRK0350HL Ph=103,8 W Pc=81,9 W Consumer of heat 45/65 Confidential
Free cooling VS Heat pump Ambient cold & low potential heat The implementation of both Freecooling technologies and heat pumps is justified from an energy efficiency perspective. FC HP However, the question always arises as to Which of these technologies is more beneficial for an enterprise? If two technologies are implemented simultaneously in one cooling system, which of them is more economically viable and under what conditions? Confidential
The research results The ratio of economic efficiency of the application of Freecooling and heat pump technologies depending on the tariffs for electricity and natural gas for a period of 120 days is shown in the table A result with + means that the use of a heat pump is advantageous compared to Freecooling The result of - means that the use of a heat pump is not profitable in comparison with Freecooling The price of electricity, / Wh 7 5 6 8 9 10 The price of gas, / 3 10 12,5 15 17,5 20 21 958 100 219 178 479 256 739 334 999 -36 258 42 002 120 262 198 523 276 783 -94 474 -16 214 62 046 140 306 218 566 -152 691 -74 431 3 829 82 090 160 350 -210 907 -132 647 -54 387 23 873 102 133 -269 124 -190 864 -112 603 -34 343 43 917 In order to obtain the greatest representativeness, data for 120 days of 2022 and 2023 with an outside air temperature below +4 were used. Confidential
Automatic switching Ambient Temperature Tariff of electricity grn/kW INPUT Tariff for natural gas m3/kW Algorithm for automatic control of Freecooling and heat pump systems depending on the tariff for electricity and natural gas Calculation of costs for the operation of Calculation of costs for the operation of FC Comparison of costs for the operation of FC By loading the obtained table into the SCADA control system, we will be able to automatically control the operation of the heat pump depending on the time-of-use tariff for electricity, which will allow us to achieve additional savings. NO YES >0 Start Start FC Confidential
Conclusions 2 1 Calculation of the priority of using energy-saving technologies Free cooling or a heat pump allows you to choose the most cost-effective technology depending on the cost of energy resources. The use of the obtained results in the automatic SCADA system allows you to configure the priority algorithm without human intervention. 3 The results of these studies confirm the promising direction of increasing energy efficiency by using low-potential heat energy of industrial enterprises' systems for the needs of heating, air conditioning, hot water supply, and meeting the technological needs of consumers. Further research on the calculation of the possibility of using various types of compressor equipment with the Freecooling system and heat pumps to obtain cold for the purpose of increasing the overall energy efficiency of industrial cold production is promising.
CONTACTS i.perepelytsia@darnitsa.ua https://ve.org.ua/index.php/journal/article/view/448
