scholarly journals Efficiency and cost analysis of a designed in-line water heating system compared to a conventional water heating system in South Africa

2012 ◽  
Vol 23 (3) ◽  
pp. 9-15
Author(s):  
Rupert Gouws ◽  
Estie Le Roux
Keyword(s):  
South Africa ◽  
Energy Consumption ◽  
Cost Analysis ◽  
Water Consumption ◽  
Heating System ◽  
Heat Pumps ◽  
Water Heating ◽  
Heating Systems ◽  
Solar Water Heating ◽  
Temperature And Pressure

In this paper, the authors compares the efficiency and cost of a designed in-line water heating system with a conventional water heating system (geyser) in South Africa. The paper provides an overview on water heating systems and heating elements and provides the typical water consumption required by an average household in South Africa. A summary on the design of the in-line water heating system together with a system cost analysis is provided. The designed in-line water heating system takes the energy consumption, temperature and pressure into account during operation. The energy consumption and cost of the designed in-line water heating system is compared to a conventional water geyser. A cost analysis on the designed in-line water heating system, heat pumps and solar water heating systems are also provided. The energy consumption results showed that the conventional water geyser on average consumes 2.5% more energy to heat one litre of water from 15 °C to 60 °C, than the designed in-line water heating system to supply one litre of water at 60°C.

scholarly journals Study of Energy Efficiency Solutions for a Smart Water Heating System

2021 ◽  
Vol 16 (1) ◽  
pp. 43-49
Author(s):  
Najat Abdeljebbar ◽  
Abdelwahab Haddaoui
Keyword(s):  
Energy Efficiency ◽  
Renewable Energy ◽  
Water Consumption ◽  
Natural Water ◽  
Smart Cities ◽  
Heating System ◽  
Heat Pumps ◽  
Hot Water ◽  
Water Heating ◽  
Smart Water

The preservation of natural water and electricity resources is essential for the development of smart cities. Indeed, water and electricity are highly dependent and must be analyzed together to improve the energy efficiency. This article is about the study of the integration of renewable energy and smart solutions in a water heating system. The existing system uses mainly heat pumps to cover the most of the hot water needs. The purpose of this work is to explore possible solutions to optimize the electricity and the water consumption of the installation.

Design and heat flow analysis of a commercial energy efficient in-line water heating system

2014 ◽  
Vol 11 (3) ◽  
pp. 239-246
Author(s):  
R. Gouws ◽  
E. le Roux
Keyword(s):  
Energy Consumption ◽  
Heat Flow ◽  
Energy Efficient ◽  
Flow Analysis ◽  
Heating System ◽  
Central Processor ◽  
Water Heating ◽  
Temperature And Pressure ◽  
Pressure Analysis ◽  
Commercial Energy

In this paper, the authors provide the design, heat flow analysis and pressure analysis of a commercial energy efficient in-line water heating system in South Africa. The designed commercial in-line water heating system captures the energy consumption, flow rate, temperature and pressure during operation and accordingly responds on these values to increase the energy efficiency of the system. The user is constantly aware of the energy consumption and cost during operation and can choose to switch to a more economical setting to conserve energy. A central processor with PID control was used to optimize the energy consumption of the in-line water heating system. An overview on the design and results of the heat flow analysis and pressure analysis are provided.

Dynamic Exergetic Cost Analysis of a Space Heating System

2011 ◽  
Vol 354-355 ◽  
pp. 722-725 ◽  
Author(s):  
Jing Yan Xiang ◽  
Jun Zhao ◽  
Xi Kui Wang ◽  
Bao Zhu Zhao
Keyword(s):  
Cost Analysis ◽  
Heating System ◽  
Heat Pumps ◽  
Exergy Destruction ◽  
Heating Season ◽  
Heating Systems ◽  
Water Transportation ◽  
Terminal Unit ◽  
Groundwater Source ◽  
Unit Component

The design of heating systems with groundwater source heat pumps (GWHP) is very important for reducing their power consumption. For better design, reasonable analysis of the systems is necessary. In this paper, a dynamic exergy and exergetic cost analysis of a heating system with GWHP is performed in a whole heating season by the use of structural theory of thermoeconomics and the software of TRNSYS. The relative exergy destruction of every component and the exergetic cost of the final product of the system are obtained. The results show that the heat pump has the largest relative exergy destruction under all the working conditions. The terminal unit component has the second largest relative exergy destruction at conditions above 10% load. However, at 10% load, well water transportation component has the second largest relative exergy destruction. The unit exergetic cost of the system final product during the whole heating season is 8.51W/W, similar to the result at 75% load.

Research on Solar Water Heating System Design of the High-Rise Residential Buildings Based on Sunlight Simulation

2014 ◽  
Vol 507 ◽  
pp. 486-491
Author(s):  
Yan Qiu Cui ◽  
Bei Zhang ◽  
Shu Feng He
Keyword(s):  
Simulation Analysis ◽  
Residential Buildings ◽  
Heating System ◽  
Water Heating ◽  
Heating Systems ◽  
Solar Water Heating ◽  
Solar Water ◽  
High Rise ◽  
The Common ◽  
Solar Water Heating System

With the acceleration of urbanization, high-rise residential buildings have dominated the present residential buildings in which it has become an irreversible trend to apply the solar water heating systems. Taking the common layout models of the high-rise residential buildings in Jinan City as examples, this paper will create models with the help of sunlight analysis software TSUN8.0 to make a simulation analysis of the valid sunlight hours of the southern facade in these buildings, in the premise that they are in line with the planning requirements, thus we may work out reasonable layout programs for the solar water heating systems application into the facade of high-rise residential buildings under different layouts, which can provide the architects with basis in the design of integrating the buildings with the system.

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