scholarly journals Shower heat exchanger: reuse of energy from heated drinking water for CO2 reduction

2016 ◽  
Vol 9 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Z. Deng ◽  
S. Mol ◽  
J. P. van der Hoek
Keyword(s):  
Drinking Water ◽  
Heat Exchanger ◽  
Co2 Emission ◽  
Energy Recovery ◽  
Co2 Reduction ◽  
Pilot Project ◽  
Recovery Efficiency ◽  
Total Energy Consumption ◽  
Co2 Emission Reduction ◽  
Water Utility

Abstract. The heating of drinking water in households contributes significantly to the emission of greenhouse gases. As a water utility aiming to operate at a climate neutral level by 2020, Waternet needs to reduce its CO2 emission by 53 kton yr−1. To contribute to this ambition, a pilot project was carried out in Uilenstede, Amstelveen, the Netherlands, to recover the shower heat energy with a shower heat exchanger from Dutch Solar Systems. An experimental setup was built in the Waternet laboratory to evaluate the claimed efficiencies. The energy recovery efficiency observed in the lab was 61–64 % under winter conditions and 57–62 % under summer conditions, while the energy recovery efficiency observed in Uilenstede was 57 % in December 2014. Based on the observations, 4 % of the total energy consumption of households in Amsterdam (electricity and gas) can be recovered with a shower heat exchanger installed in all households in Amsterdam, which also means a 54 kton year−1 CO2 emission reduction can be achieved.

scholarly journals Shower heat exchanger: reuse of energy from heated drinking water for CO2 reduction

2015 ◽  
Vol 8 (2) ◽  
pp. 119-141
Author(s):  
Z. Deng ◽  
S. Mol ◽  
J. P. van der Hoek
Keyword(s):  
Drinking Water ◽  
Heat Exchanger ◽  
Co2 Emission ◽  
Energy Recovery ◽  
Co2 Reduction ◽  
Pilot Project ◽  
Recovery Efficiency ◽  
Total Energy Consumption ◽  
Co2 Emission Reduction ◽  
Water Utility

Abstract. The heating of drinking water in households contributes for a significant amount to the emission of greenhouse gases. As a water utility aiming to operate climate neutral by 2020, Waternet needs to reduce its CO2 emission by 53 kton yr−1. To contribute to this ambition, a pilot project was carried out in Uilenstede, Amstelveen, the Netherlands, to recover the shower heat energy with a shower heat exchanger from Dutch Solar Systems. An experimental set up was built in the Waternet laboratory to compare field conditions and lab conditions. The energy recovery efficiency observed in the lab was 61–64 % under winter conditions and 58–62 % under summer conditions, while the energy recovery efficiency observed in Uilenstede was 57 % in December 2014. Based on the observations, 4 % of the total energy consumption of households in Amsterdam (electricity and gas) can be recovered with a shower heat exchanger installed in all households in Amsterdam, which also means a 54 kton yr−1 CO2 emission reduction.

scholarly journals An analysis of the innovative exhaust air energy recovery heat exchanger

2018 ◽  
Vol 240 ◽  
pp. 02003 ◽  
Author(s):  
Marek Borowski ◽  
Marek Jaszczur ◽  
Daniel Satoła ◽  
Sławosz Kleszcz ◽  
Michał Karch
Keyword(s):  
Heat Exchanger ◽  
Energy Recovery ◽  
Energy Use ◽  
Dynamic Change ◽  
Ventilation System ◽  
Primary Source ◽  
Winter Period ◽  
Recovery Efficiency ◽  
Total Energy Consumption ◽  
Result Show

Heating, ventilation and air conditioning systems are responsible for a nearly 50% of total energy consumption in operated buildings. One of the most important parts of the ventilation system is an air handling unit with a heat exchanger for energy recovery which is responsible for effective and efficient energy recovery from exhaust air. Typically heat exchangers are characterised by the producers by heat and humidity recovery efficiency up to 90% and 75% respectively. But these very high values are usually evaluated under laboratory conditions without taking into account a dynamic change of outdoor and indoor air conditions significantly affecting the recovery efficiency. In this paper, results of thermal, humidity and enthalpy recover efficiency of innovative energy recovery exchanger have been presented. The analysed system allows adjustment of the humidity recovery especially useful in the winter period and forefends energy use for an anti-froze system of energy exchanger. Presented result show that analysed innovative system can achieve the value of thermal efficiency recovery higher than 90% and efficiency of humidity recovery about 80%. This is possible because the analysed system is able to work without the use of any primary source energy or other anti-freeze systems. Presented in this research unique solution is able to work without external anti-freeze systems even in extremely adverse outdoor air conditions such as minus 20°C and humidity 100% RH.

Economic, Exergy, and Environmental Analyses of the Energy Assessments for US Industries

2021 ◽  
pp. 1-15
Author(s):  
Alaa Hasan ◽  
Osama M. Selim ◽  
Mohamed Abousabae ◽  
Ryoichi S. Amano ◽  
Wilkistar Otieno
Keyword(s):  
Cash Flow ◽  
Emission Reduction ◽  
Co2 Emission ◽  
Exergy Analysis ◽  
Co2 Reduction ◽  
Cost Savings ◽  
Industrial Applications ◽  
Co2 Emission Reduction ◽  
Energy Assessment ◽  
Implementation Rate

Abstract This paper highlights the expected versus actual outcomes of 152 energy analyses that were performed between 2011 and 2020. The 1,317 energy assessment recommendations (ARs) are grouped into eight categories. This study adopted four measures per category: annual electricity savings, annual gas savings, annual cost savings, and annual CO2 emission reduction. The first part of the analysis compares the expected recommendations to each measure's actually implemented values for the eight categories. It was found that the percentages of the actual to the expected electricity, gas, and cost savings are 26.6%, 11.4%, and 17.1%, respectively. In contrast, the percentage of the actual to the expected CO2 reduction is 22%. Moreover, the second part of the analysis presents each category's implementation rate and the reasons for rejecting the unimplemented ARs. Cash flow and expensive initial investment resulted in rejecting 25% of ARs. Finally, the study proposes techniques and strategies to increase ARs' implementation rate and improve all private energy services industries' implementation rate. An exergy analysis is added to show the improvement that energy assessment achieves regarding exergy and exergy efficiencies of different industrial applications.

scholarly journals Methodology to Calculate the CO2 Emission Reduction at the Coal-Fired Power Plant: CO2 Capture and Utilization Applying Technology of Mineral Carbonation

2020 ◽  
Vol 12 (18) ◽  
pp. 7402
Author(s):  
Bong Jae Lee ◽  
Jeong Il Lee ◽  
Soo Young Yun ◽  
Beom Gu Hwang ◽  
Cheol-Soo Lim ◽  
...  
Keyword(s):  
Power Plant ◽  
Emission Reduction ◽  
Co2 Emission ◽  
Carbon Capture ◽  
Co2 Reduction ◽  
Mineral Carbonation ◽  
Co2 Emission Reduction ◽  
Fundamental Study ◽  
Nationally Determined Contributions ◽  
Carbon Dioxide Co2

This study introduces a novel methodology to calculate the carbon dioxide (CO2) emission reduction related to residual emissions, calculating the CO2 emission reduction through a 2 MW (40 tCO2/day) carbon capture and utilization (CCU) plant installed at a 500 MW coal-fired power plant in operation, to evaluate the accuracy, maintainability, and reliability of the quantified reduction. By applying the developed methodology to calculate the CO2 emission reduction, the established amount of CO2 reduction in the mineral carbonation was evaluated through recorded measurement and monitoring data of the 2 MW CCU plant at the operating coal-fired plant. To validate the reduction, the accuracy, reproducibility, consistency, and maintainability of the reduction should be secured, and based on these qualifications, it is necessary to evaluate the contribution rate of nationally determined contributions (NDCs) in each country. This fundamental study establishes the concept of CCU CO2 reduction and quantifies the reduction to obtain the validation of each country for the reduction. The established concept of the CCU in this study can also be applied to other CCU systems to calculate the reduction, thereby providing an opportunity for CCU technology to contribute to the NDCs in each country and invigorate the technology.

Opportunities for public water utilities in the market of energy from water

2011 ◽  
Vol 63 (12) ◽  
pp. 2909-2915 ◽  
Author(s):  
S. S. M. Mol ◽  
J. M. Kornman ◽  
A. J. Kerpershoek ◽  
A. W. C. van der Helm
Keyword(s):  
Energy Source ◽  
Drinking Water ◽  
Energy Recovery ◽  
Water Cycle ◽  
Sustainable Energy ◽  
Water Utilities ◽  
Water Utility ◽  
Practical Applications ◽  
The Public ◽  
Water Flows

An inventory is made of the possibilities to recover sustainable energy from the water cycle by identifying different water flows in a municipal environment as a sustainable energy source. It is discussed what role public water utilities should play in the market of energy from water. This is done for Waternet, the public water utility of Amsterdam, by describing experiences on two practical applications for aquifer thermal energy storage and energy recovery from drinking water. The main conclusion is that public water utilities can substantially contribute to the production of sustainable energy, especially by making use of heat and cold from the water cycle. Public water utilities have the opportunity to both regulate and enter the market for energy from water.

scholarly journals Multi-Country Scale Assessment of Available Energy Recovery Potential Using Micro-Hydropower in Drinking, Pressurised Irrigation and Wastewater Networks, Covering Part of the EU

Water ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 899
Author(s):  
Djordje Mitrovic ◽  
Miguel Crespo Chacón ◽  
Aida Mérida García ◽  
Jorge García Morillo ◽  
Juan Antonio Rodríguez Diaz ◽  
...  
Keyword(s):  
Drinking Water ◽  
Northern Ireland ◽  
Energy Recovery ◽  
Large Scale ◽  
Significant Proportion ◽  
Value Added ◽  
Cost Effective ◽  
Net Energy ◽  
Water Networks ◽  
Scale Assessment

Studies have shown micro-hydropower (MHP) opportunities for energy recovery and CO2 reductions in the water sector. This paper conducts a large-scale assessment of this potential using a dataset amassed across six EU countries (Ireland, Northern Ireland, Scotland, Wales, Spain, and Portugal) for the drinking water, irrigation, and wastewater sectors. Extrapolating the collected data, the total annual MHP potential was estimated between 482.3 and 821.6 GWh, depending on the assumptions, divided among Ireland (15.5–32.2 GWh), Scotland (17.8–139.7 GWh), Northern Ireland (5.9–8.2 GWh), Wales (10.2–8.1 GWh), Spain (375.3–539.9 GWh), and Portugal (57.6–93.5 GWh) and distributed across the drinking water (43–67%), irrigation (51–30%), and wastewater (6–3%) sectors. The findings demonstrated reductions in energy consumption in water networks between 1.7 and 13.0%. Forty-five percent of the energy estimated from the analysed sites was associated with just 3% of their number, having a power output capacity >15 kW. This demonstrated that a significant proportion of energy could be exploited at a small number of sites, with a valuable contribution to net energy efficiency gains and CO2 emission reductions. This also demonstrates cost-effective, value-added, multi-country benefits to policy makers, establishing the case to incentivise MHP in water networks to help achieve the desired CO2 emissions reductions targets.

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