scholarly journals Seasonal performance assessment of sanitary hot water production systems using propane and CO 2 heat pumps

2017 ◽  
Vol 74 ◽  
pp. 224-239 ◽  
Author(s):  
M. Tammaro ◽  
C. Montagud ◽  
J.M. Corberán ◽  
A.W. Mauro ◽  
R. Mastrullo
Keyword(s):  
Performance Assessment ◽  
Production Systems ◽  
Heat Pumps ◽  
Hot Water ◽  
Water Production ◽  
Seasonal Performance

scholarly journals Combining Heat Pumps with Solar Energy for Domestic Hot Water Production

2012 ◽  
Vol 30 ◽  
pp. 101-105 ◽  
Author(s):  
Andreas Genkinger ◽  
Ralf Dott ◽  
Thomas Afjei
Keyword(s):  
Solar Energy ◽  
Heat Pumps ◽  
Hot Water ◽  
Water Production ◽  
Domestic Hot Water

scholarly journals THE OPTIONS OF WASTE HEAT UTILIZATION IN A BUILDING OF MEDICAL PRODUCT’S MANUFACTURE

2020 ◽  
Vol 12 (0) ◽  
pp. 1-6
Author(s):  
Giedrius Šiupšinskas ◽  
Martynas Blinstrubis
Keyword(s):  
Production Systems ◽  
Waste Heat ◽  
Hot Water ◽  
Water Production ◽  
Engineering Systems ◽  
Heat Flows ◽  
Medical Products ◽  
Design Variant ◽  
Flow Demand ◽  
Waste Heat Utilization

This article examines the possibilities of using waste heat in a building for the production of medical products. During the production, 6 compressors operate continuously, and the generated excess heat is removed through coolers or partially used in building heating, ventilation and domestic hot water production systems. The aim of this article is to model and evaluate the possibilities of using waste heat after performing the analysis of heat flow demand of all the engineering systems. The pinch method is used to achieve this goal. Heat flows and heat exchanger network are modelled using PinCH 3.0 software. The performed assessment shows that with the help of pinch analysis, in the analysed object it is possible to recover and use more than 20% of waste heat as compared to the initial design variant.

scholarly journals Improving Thermoeconomic and Environmental Performance of District Heating via Demand Pooling and Upscaling

Energies ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 8546
Author(s):  
Jaume Fitó ◽  
Neha Dimri ◽  
Julien Ramousse
Keyword(s):  
Production Systems ◽  
District Heating ◽  
Heat Pumps ◽  
Environmental Indicators ◽  
Hot Water ◽  
Energy And Exergy ◽  
Total Investment ◽  
Solar Thermal Collectors ◽  
Levelized Cost Of Heat ◽  
Fuel Costs

This study evaluates the effects of pooling heat demands in a district for the purpose of upscaling heat production units by means of energy, exergy, economic, exergoeconomic, and environmental indicators, as well as the sensitivity to investment and fuel costs. The following production systems to satisfy the heat demands (domestic hot water production and space heating) of a mixed district composed of office (80%), residential (15%), and commercial (5%) buildings are considered: gas- and biomass-fired boilers, electric boilers and heat pumps (grid-powered or photovoltaic -powered), and solar thermal collectors. For comparison, three system sizing approaches are examined: at building scale, at sector scale (residential, office, and commerce), or at district scale. For the configurations studied, the upscaling benefits were up to 5% higher efficiency (energy and exergy), there was lower levelized cost of heat for all systems (between 20% and 54%), up to 55% lower exergy destruction costs, and up to 5% greater CO2 mitigations. In conclusion, upscaling and demand pooling tend to improve specific efficiencies, reduce specific costs, reduce total investment through the peak power sizing method, and mitigate temporal mismatch in solar-driven systems. Possible drawbacks are additional heat losses due to the distribution network and reduced performance in heat pumps due to the higher temperatures required. Nevertheless, the advantages outweigh the drawbacks in most cases.

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