Thermal Performance Analysis of a Fully Mixed Solar Storage Tank in a ZEB Hot Water System

Mohammad Sameti¹, Alibakhsh Kasaeian^1, , Seyedeh Sima Mohammadi² and Nastaran Sharifi³

¹Departmentof Renewable Energies, Faculty of New Sciences and Technologies, University of Tehran, Tehran, Iran

²Department of Mechanical Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran

³Department of Mechanical Engineering, University of Zanjan, Zanjan, Iran

Cite this paper:
Mohammad Sameti, Alibakhsh Kasaeian, Seyedeh Sima Mohammadi and Nastaran Sharifi. Thermal Performance Analysis of a Fully Mixed Solar Storage Tank in a ZEB Hot Water System. Sustainable Energy. 2014; 2(2):52-56. doi: 10.12691/rse-2-2-3

Abstract

The intermittency is inherently affects the solar energy as the main hot water supplier in renewable systems. Therefore, the storage of the hot water is a vital part of a reliable energy supply system for buildings. Using a proper storage system makes it possible to fill the shortfall or emergency periods. This paper studies the daily thermal performance of a horizontal solar storage tank. It is assumed that the hot water load is similar to the Rand profile and the auxiliary heater is a biomass-fired boiler. The Rand profile assumes a daily hot water of consumption of 120 liters for a family of four. Furthermore, the tank is considered to be fully mixed because its height is relatively low. It means that the temperature in the solar zone of the tank is uniform. This assumption simplifies the analysis because the storage and the load temperature would be the same. The profiles for the storage water temperature, solar fraction and the useful energy gain was obtained and the effects of principal parameters are studied.

Keywords:
solar energy storage tank Domestic Hot Water (DHW) Building Energy Simulation

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