Design of a novel geothermal heating and cooling system: Energy and economic analysis

2016 ◽  
Vol 108 ◽  
pp. 144-159 ◽  
Author(s):  
G. Angrisani ◽  
G. Diglio ◽  
M. Sasso ◽  
F. Calise ◽  
M. Dentice d’Accadia
Keyword(s):  
Economic Analysis ◽  
Cooling System ◽  
Geothermal Heating ◽  
Heating And Cooling ◽  
System Energy

A Review of the Advancements in Geothermal Heating and Cooling System

2017 ◽  
Vol 9 (1) ◽  
pp. 105
Author(s):  
Nimish Dhepe ◽  
Raahul Krishna
Keyword(s):  
Geothermal Energy ◽  
Fossil Fuels ◽  
Cooling System ◽  
Electricity Consumption ◽  
Operating Costs ◽  
Space Heating ◽  
Energy Technology ◽  
Geothermal Heating ◽  
Heating And Cooling ◽  
Increasing Demand

The increasing demand for energy and the depleting fossil fuels have fuelled explorations in new frontiers of Renewable Energy Technology. Geothermal Heating and Cooling is a new advancement in HVAC industry of India. It uses earth’s heat for space heating and cooling with the use of Heat Pump systems, saving up to 51% electricity consumption in HVAC, and reduced CO2 emissions. The main prospects of Geothermal Energy are longer equipment life and lower operating costs. This paper reviews the recent advancements in Geothermal Heating and Cooling System.

Solar Façade for a Combined Heating and Cooling System in London

2013 ◽  
Vol 284-287 ◽  
pp. 1409-1415
Author(s):  
Hoy Yen Chan ◽  
Saffa Riffat ◽  
Jie Zhu
Keyword(s):  
Economic Analysis ◽  
Cooling System ◽  
Weather Conditions ◽  
Integrated System ◽  
Present System ◽  
Total System ◽  
Heating And Cooling ◽  
Plate Area ◽  
June July ◽  
Simple Economic

A combined heating and cooling system was developed and the system performance was simulated by a mathematical model. This is a building integrated system whereby the facade is used as a solar collector. The system consists of two cavities, i.e. the air is heated throughout the Cavity 1 whereas the air in Cavity 2 is cooled via indirect evaporative cooling. The simulation study used weather conditions of London for a south-facing façade with plate area of 40m2; and followed by a simple economic analysis for the system. Space heating is needed for most of the months, however cooling is more favorable for the months of June, July and August. It is estimated that present system is able to give an annual energy saving of 10,877kWh, which is equivalent to 5,874kgCO2/year of emission avoidance. Moreover, it is cheaper compared to the conventional solar flat plate air heaters. For a discount rate of 5% and 30 years of lifetime, the economic analysis found that the total system cost is approximately £4,952, which gives a payback period for less than a year.

Design and Development of an Additively Manufactured Geothermal Heat Exchanger for Improved Efficiency and Easy Installation

2020 ◽  
Author(s):  
Takele Gemeda ◽  
Sandy Estrada ◽  
Wondwosen Demisse ◽  
Lei Wang ◽  
Jiajun Xu
Keyword(s):  
Additive Manufacturing ◽  
Heat Exchanger ◽  
Constant Temperature ◽  
Energy Systems ◽  
The United States ◽  
Geothermal System ◽  
Geothermal Systems ◽  
Geothermal Heating ◽  
Heating And Cooling ◽  
System Energy

Abstract Effective system energy management and cooling is critical for a range of increasingly complex systems and missions. Various industries and agencies seek technologies to use energy more efficiently in various applications, and thereby increase system energy efficiencies in future advanced energy systems. There has been an increasing interest in exploiting the use of additive manufacturing in developing nontraditional energy conversion schemes. Meanwhile, wind power and solar power systems have become part of common knowledge and conversation over the past few years. While these provide excellent sustainable options of energy production, geothermal energy systems are just as efficient and economical. Solar and wind energy collectors are also site specific. On the other hand, the geothermal systems do not take up buildable ground level space nor are they location or climate specific. The earth has a generally constant temperature throughout the year which can be used in geothermal systems to benefit all sites. If all geothermal resources were combined, enough energy would be produced to provide all of the electricity needs in the United States. However, conventional geothermal system requires the relatively complex installation process and can potentially be cost prohibitive to many potential users. In this study, an additively manufactured heat exchanger was designed and developed to resolve that issue. The heat exchanger can be integrated with a conventional geothermal heating and cooling system for improved efficiency and easy installation. A customized geothermal heating and cooling loop was designed and developed for testing the efficiency of the heat exchanger. Within this proposed system, this additive manufactured heat exchanger is designed and fabricated to improve it efficiency and easy installation with minimal tools needed. This new design eliminates the need of excavation of the soil and installation of long tubes as conventionally required for geothermal system. This new heat exchanger was designed using CREO software and fabricated using an EOS M280 direct metal laser sintering system at University of the District of Columbia. It is then integrated with a heat pump to exchange heat between a constant temperature of water bath circulator and a water heat sink. A prototype system was designed and constructed, which allowed the direct assessment of its performance. The performance of the heat exchanger is studied using COMSOL software to assess its heat transfer performance. The results have shown a significant improvement in its efficiency. It has shown the promising application of metal additive manufacturing technique in improving the efficiency of existing energy harvesting applications.

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