APPLICATION OF HEAT PUMPS AS THE DIRECTION OF THE DEVELOPMENT OF DISTRICT HEATING COGENERATION

The article is dedicated to use of the heat pump for improvement of district heating with cogeneration station. At the present time, improving the efficiency of cogeneration stations is one of the priority goals in the development of district heating. One of the most perspective options for improving the efficiency of cogeneration stations is to reduce the temperature of the heat network schedule, with the greatest effect achieved by applying individual systems with heat pumps for the thermal energy consumers as final heaters. However, the existing solutions require significant capital expenditures. Thus, a technology allowing organizing the gradual installation heat pumps in heating systems with low cost is required for implementing the existing projects. As a starting stage of integrating the heat pump compensation of the hot water supply load in the non-heating period is offered. For this purpose, we developed a universal system for the load compensation of the hot water supply, which is a cost-effective and relatively affordable way to initial exploitation of heat pump in a district heating. The system is based on a block containing a heat pump with circulation pumps. The system allows using heating appliances as a heat exchanger to capture excess heat in building premises. To do this, the heating circuit is cut off from the thermal networks and closed through the heat pump with the help of valves. The pump helps organize the circulation of the heat transfer medium in circuit. The heating medium is cooled in the evaporator, and then replenishes the heat from the heat of the building. The collected heat is transferred to the condenser with a higher potential sufficient to heat water for the consumer. The proposed technology allows to effectively compensate for the hot water load with minimal capital cost and simplicity of design. This universal system of hot water load compensation using the heat pump is designed primarily to attract the consumers and to gradually introduce the heat pump for all subscribers within each cogeneration station with a view of a transition of the system to lower temperature schedule.