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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
TECHNICAL-ECONOMIC STUDY OF FLAT COLLECTORS AND EVACUATED TUBE COUPLED TO A HEAT PUMP FOR HEATING SYSTEMS
Submission Author:
Leslye Soares Ferreira , RN , Brazil
Co-Authors:
Leslye Soares Ferreira, Gabriel Ivan Medina Tapia
Presenter: Leslye Soares Ferreira
doi://10.26678/ABCM.ENCIT2020.CIT20-0344
Abstract
This work presents the comparison between the flat solar collector and the evacuated tube combined with a heat pump for a heating system. The analysis performed is done through an algorithm in the MATLAB software that simulates the operation of the heating system in the city of Porto Alegre, where water must be supplied to a residential building. The consumption profile established for the simulation is 20 m³ per day. The model of the water heating system is the ASHP, which consists of two fixed volume reservoirs, an air-liquid heat pump, an auxiliary heater, and the collectors. The study of the thermal performance was formed based on the efficiency of collectors and the performance indicators. The economic analysis was done by calculating the LCS of the system, which was solved using method P1−P2. From the system analysis, a set of differential equations was obtained, which were solved by the finite difference method. The simulation resulted in a set of graphs that show system indicators according to the area of collectors. The flat collector presented the highest financial return among the collectors and good performance for areas over 330 m². The evacuated tube reached a maximum LCS of around 190 m².
Keywords
evacuated tube collector, flat solar collector, ASHP, heat pump, Heating System
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