Hybrid solar-electric systems for improving energy efficiency in the preparation and use of domestic hot water in households

Abstract

Hot water consumption in households is an essential component in the energy consumption structure and represents a significant potential for improving the energy efficiency of this category of consumers. In this paper a hybrid solar-electric system for obtaining hot water is proposed. The basic idea is the primary use of roof-integrated solar thermal systems for the preparation of hot water used by domestic sanitary appliances. Classic electrical heaters in sanitary facilities would be a secondary system that would ensure reliability of the system in conditions of insufficient insolation.This paper presents basic elements of improvement of existing installations of sanitary devices and energy balance calculations and savings that are made in relation to standard solutions. In addition to significantly improving energy efficiency, very significant effects have been achieved in terms of increasing the speed of work processes performed by individual domestic appliances, such as washing machines and dishwashers. Hybrid solarelectric systems for improving energy efficiency in the preparation and use of domestic hot water in households

u strukturi potrošnje energije i predstavlja značajan potencijal za unapređenje energetske efikasnosti ove kategorije potrošača. U ovom radu je predložen hibridni solarnoelektrični sistem za dobijanje tople vode. Osnovna ideja je primarno korišćenje krovno integrisanih solarno-termalnih sistema za pripremu tople vode koju koriste sanitarni uređaji u domaćinstvu. Klasični električni grejači u sanitarnim uređajima bi bili sekundarni sistem koji bi obezbeđivao pouzdanost rada sistema u uslovima nedovoljne insolacije. U ovom radu prikazani su osnovni elementi unapređenja postojećih instalacija sanitarnih uređaja i izvršeni proračuni energetskog bilansa i ušteda koje se ostvaruju u odnosu na standardna rešenja. Pored značajnog unapređenja energetske efiksanosti postignuti su i veoma značajni efekti u pogledu povećanja brzine radnih procesa koje obavljaju pojedini sanitarni uređaji u domaćinstvu, kao što su veš mašine i mašine za pranje suđa.