A sensitized thermal cell recovered using heat

2019 ◽  
Vol 7 (31) ◽  
pp. 18249-18256 ◽  
Author(s):  
S. Matsushita ◽  
T. Araki ◽  
B. Mei ◽  
S. Sugawara ◽  
Y. Inagawa ◽  
...  
Keyword(s):  
Heat Source ◽  
Electric Power ◽  
Thermal Cell

A sensitized thermal cell makes it possible to obtain stable electric power by only burying the cell in a heat source and turning a switch on and off.

Economical and Environmental Aspects of Heat Pump System Utilizing Unused Energy in Aquarium

2004 ◽  
Author(s):  
Satoru Okamoto
Keyword(s):  
Heat Source ◽  
Electric Power ◽  
Latent Heat ◽  
Heat Pump ◽  
Storage System ◽  
Latent Heat Storage ◽  
Pump System ◽  
Heat Pump System ◽  
Power Load ◽  
Load Leveling

This paper introduces a heat pump system with a latent heat storage utilizing seawater installed in an aquarium. Heat from the seawater is collected and used as the heat source for the heat pump system. This maintains the indoor conditions at constant temperature and relative humidity. With regard to the heat pump system using low-temperature unutilized heat source, development is introduced on a heat source load responsive heat pump system, with combines a load variation responsive heat pump utilizing seawater with a latent heat (ice plus water slurry) storage system using nighttime electric power serving for electric power load leveling. The desired outcome would be to show that the costs of generating heat energy with the seawater-source heat pump are significantly less than those with the air-source heat pump and the oil-fired system. Additionally, the CO2 emissions for the seawater-source heat pump compare favourably as they maybe less than those for the other conventional assumed systems described.

Effective Utilization System of Unused Energy in Aquarium

2003 ◽  
Author(s):  
Satoru Okamoto
Keyword(s):  
Heat Source ◽  
Electric Power ◽  
Latent Heat ◽  
Heat Pump ◽  
Heat Storage ◽  
Coefficient Of Performance ◽  
Latent Heat Storage ◽  
Pump System ◽  
Heat Pump System ◽  
Power Load

This paper introduces a heat pump system with a latent heat storage utilization seawater installed in an aquarium. For heating purpose such as air conditioning in order to maintain the indoor conditions at constant temperature and constant relative humidity, and cooling water supply to the fish tank in the aquarium, heat from seawater is collected as the heat source for the heat pump system. With regard to the heat pump system using low-temperature unutilized heat source, development is introduced on a heat source load responsive heat pump system, with combines a load variation responsive heat pump utilizing seawater with a latent heat (ice plus water slurry) storage system using nighttime electric power serving for electric power load leveling. The experimental COP (Coefficient of performance) of the proposed heat exchanger from seawater and latent heat storage cooling assisted heat pump system will be shown in detail.

Evaluation of a Novel Quadruple Combined Cycle with the Magnetohydrodynamic Generator based on 6E Analysis

2020 ◽  
pp. 1-28
Author(s):  
Mohammadamin Esmaeilzadehazimi ◽  
Mohammad Hasan Khoshgoftar Manesh ◽  
M. Majidi ◽  
Mohsen Nourpour
Keyword(s):  
High Temperature ◽  
Heat Source ◽  
Electric Power ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Combined Cycle ◽  
Brayton Cycle ◽  
Exergy Performance ◽  
Organic Fluids ◽  
First Time

Abstract The generation of the electric power through magnetohydrodynamic is one of the most advanced high -temperature energy conversions as it directly turns the heat into electricity. In this study, a quadruple cycle with magnetohydrodynamic generator was considered as the upstream cycle and a Brayton cycle was taken as the middle cycle through heating and an organic Rankine cycle and steam cycle were regarded as the downstream cycles using the heat loss of the magnetohydrodynamic generator and gas turbine, respectively. Energy, exergy, exergoeconomic, exergoenvironmental, emergoeconomic, and emergoenvironmental (6E) analyses were done in the proposed system simultaneously for the first time. In addition, advanced exergy, exergoeconomic, and exergoenvironmental analyses were performed for the proposed system to show the effect of irreversibility accurately and deeply. Despite the slight difference between the results of the emergoeconomic and emergoenvironmental sector with the exergoeconomic and exergoenvironmental sector, the obtained qualitative results were very similar showing that the emergoeconomic and emergoenvironmental analyses can be proper alternatives to the conventional exergoeconomic and exergoenvironmental analyses. The temperature of the heat source is one of the most important criteria for fluid selection in the organic Rankin cycles. Five organic fluids were selected and evaluated according to the desired hot source temperature for the Rankin organic cycle (262 °C). The results showed that the R141b with energy and efficiency of 15.25 and 58.05%, respectively had the best thermodynamic and exergy performance with the least amount of total costs using this fluid.

scholarly journals Experimental Investigation of a 300 kW Organic Rankine Cycle Unit with Radial Turbine for Low-Grade Waste Heat Recovery

Entropy ◽  
2019 ◽  
Vol 21 (6) ◽  
pp. 619 ◽  
Author(s):  
Ruijie Wang ◽  
Guohua Kuang ◽  
Lei Zhu ◽  
Shucheng Wang ◽  
Jingquan Zhao
Keyword(s):  
Heat Source ◽  
Electric Power ◽  
Power Output ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Volume Flow Rate ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Low Grade ◽  
Electric Power Output

The performance of a 300 kW organic Rankine cycle (ORC) prototype was experimentally investigated for low-grade waste heat recovery in industry. The prototype employed a specially developed single-stage radial turbine that was integrated with a semi-hermetic three-phase asynchronous generator. R245fa was selected as the working fluid and hot water was adopted to imitate the low-grade waste heat source. Under approximately constant cooling source operating conditions, variations of the ORC performance with diverse operating parameters of the heat source (including temperature and volume flow rate) were evaluated. Results revealed that the gross generating efficiency and electric power output could be improved by using a higher heat source temperature and volume flow rate. In the present experimental research, the maximum electric power output of 301 kW was achieved when the heat source temperature was 121 °C. The corresponding turbine isentropic efficiency and gross generating efficiency were up to 88.6% and 9.4%, respectively. Furthermore, the gross generating efficiency accounted for 40% of the ideal Carnot efficiency. The maximum electric power output yielded the optimum gross generating efficiency.

scholarly journals Ultra-low-temperature district heating systems – a way to maximise the ecological and economical effect of an investment?

2018 ◽  
Vol 44 ◽  
pp. 00018 ◽  
Author(s):  
Bartłomiej Ciapała ◽  
Jakub Jurasz ◽  
Mirosław Janowski
Keyword(s):  
Low Temperature ◽  
Heat Source ◽  
Electric Power ◽  
Economic Impacts ◽  
District Heating ◽  
Ecological Effects ◽  
Capacity Factor ◽  
Heating Systems ◽  
Ecological Aspects ◽  
District Heating Systems

One of the most challenging aspects of a new district heating (DH) design is its general performance, which will determine the ecological and economic impacts of the investment. Choosing the lowest applicable temperatures which are distributed via ultra-low-temperature district heating (ULTDH) systems may yield the desired results. The article elaborates the economic and ecological aspects of the application of ULTDH. The results of the analysis indicate that the capacity factor may be significantly improved, while the overall ecological effects of the investment are strongly dependent on the previously used heat source and the source of electric power.

Reverse Osmosis Desalination

1994 ◽  
Vol 31 (03) ◽  
pp. 195-200
Author(s):  
Dana L. Abdella
Keyword(s):  
Heat Source ◽  
Electric Power ◽  
Reverse Osmosis ◽  
Operational Reliability ◽  
Semipermeable Membrane ◽  
Water Molecules ◽  
Surface Ship ◽  
Pass Through ◽  
Marine Applications ◽  
Reverse Osmosis Desalination

Reverse osmosis (RO) desalination is a method of producing fresh water from seawater by a process similar to filtration, rather than by traditional evaporative distillation. A semipermeable membrane allows water molecules to pass through while blocking the passage of most other ions. The qualities of RO which make it attractive for naval and marine applications are its ability to operate on electric power alone, requiring no heat source; its comparatively low system weight to other methods of freshwater production at sea; and its ability to operate automatically, requiring minimal operator attention. RO's high operational reliability has contributed to its gain in popularity in recent years. RO is used for freshwater production in commercial industry and surface ship applications worldwide. The following research paper discusses RO desalination and presents RO as an alternative to conventional distillation for naval and marine use.

Ejection Refrigeration Cycles

2015 ◽  
pp. 155-206
Author(s):  
Dariusz Józef Butrymowicz ◽  
Kamil Leszek Śmierciew ◽  
Jerzy Gagan ◽  
Jarosław Karwacki
Keyword(s):  
Low Temperature ◽  
Heat Source ◽  
Greenhouse Gases ◽  
Electric Power ◽  
Waste Heat ◽  
Absorption Refrigeration ◽  
Refrigeration System ◽  
Temperature Heat

The chapter presents the development of ejector refrigeration technology that strongly reduces the greenhouse gases emission by using natural refrigerants and also dramatically reduces the need for the electric power. This is accomplished by using free or inexpensive heat – either solar or waste heat, as the main source of energy instead of electricity. Nowadays, the thermal driven refrigeration system, especially with low-temperature heat source became more and more popular. The operation of the ejection cycle using low-temperature heat source can be considered as very attractive and the ejection cycles becomes truly competitive in comparison with the absorption refrigeration systems.

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