Design and simulated performance of a solar-thermal system employing seasonal storage for providing the majority of space heating and domestic hot water heating needs to a single-family house in a cold climate

Solar Energy ◽  
2019 ◽  
Vol 191 ◽  
pp. 57-69 ◽  
Author(s):  
Ian Beausoleil-Morrison ◽  
Briana Kemery ◽  
Adam D. Wills ◽  
Curtis Meister
Keyword(s):  
Cold Climate ◽  
Hot Water ◽  
Space Heating ◽  
Thermal System ◽  
Single Family ◽  
Water Heating ◽  
Domestic Hot Water ◽  
Simulated Performance ◽  
Solar Thermal System ◽  
Family House

scholarly journals Investigation of temperature drop in domestic hot water circuit

2018 ◽  
Vol 44 ◽  
pp. 00158
Author(s):  
Ilona Rzeźnik
Keyword(s):  
Experimental Investigation ◽  
Energy Savings ◽  
Temperature Drop ◽  
Pump Energy ◽  
Working Time ◽  
Hot Water ◽  
Single Family ◽  
Domestic Hot Water ◽  
Circulation Pump ◽  
Family House

The results of experimental investigation of determining the time of temperature drop in domestic hot water circuit were presented in this paper on the example of single-family house. The test were carried out on vertical sections of installations made of PE-X/Al/PE pipes (cross-linked polyethylene and aluminum) with and without insulation. The temperature drop process was investigated in temperature range typical for domestic hot water installation from 55ºC to 40ºC. On the basis of the obtained results with appropriate adjustment of the working time of circulation pump, energy savings of 90% were achieved.

scholarly journals Influence of the quantity profile of the domestic hot water demand and the energy demand for the heating in a single-family house on the SCOP of the air-to-water heat pump

2018 ◽  
Vol 44 ◽  
pp. 00162 ◽  
Author(s):  
Kamil Skoneczny
Keyword(s):  
Energy Efficiency ◽  
Heat Pump ◽  
Water Demand ◽  
Energy Demand ◽  
Hot Water ◽  
Single Family ◽  
Domestic Hot Water ◽  
Family House

In the article it was discussed how the energy efficiency of the air-to-water heat pump can change depending on the different ways of the building usage. The author shows that the following factors influence this efficiency: the DHW demand and the demand of the energy for the heating of the building. The article shows that it is very important to take into account the cooperation of both systems, the DHW and the heating. Two models of the SCOP calculations were discussed: in monthly and hourly steps of the calculation. For each model the following assumptions were considered: the different profiles of the domestic hot water demand and the different profiles of the demand for the heating of building.

Simulation Study of a Novel Solar Thermal Seasonal Heat Storage System Based on Stable Supercooled PCM for Space Heating and Domestic Hot Water Supply of Single Family Houses

2019 ◽  
Vol 887 ◽  
pp. 650-658
Author(s):  
Christoph Moser ◽  
Gerald Englmair ◽  
Hermann Schranzhofer ◽  
Andreas Heinz
Keyword(s):  
Water Supply ◽  
Latent Heat ◽  
Heat Supply ◽  
Heat Storage ◽  
Hot Water ◽  
Solar Thermal ◽  
Space Heating ◽  
Single Family ◽  
Domestic Hot Water ◽  
Hot Water Supply

A TRNSYS model of a novel PCM heat storage, utilizing stable supercooling of Sodium Acetate Trihydrate (SAT), is presented. To achieve high solar fractions in heat supply of single family houses, the necessary integration of big water volumes is challenging. To evaluate its functionality, a system model of a solar thermal combisystem for space heating and domestic hot water supply for dynamic system simulation was built. The key component is a PCM volume for long term heat storage. While conventional heat storage concepts with SAT release the latent heat a few degrees below the melting temperature, with the concept of stable supercooling latent heat can be stored for long periods of time at ambient temperature. This allows the design of a partly loss-free storage. Solar fractions were evaluated for simulation runs with two building variations. Annual specific space heating demands of 15 and 30 kWh/(m2a) and a domestic hot water demand of a typical single family house were considered. A sensitivity analysis on solar fractions of domestic heat supply was performed by variation of the collector field and the PCM volume. While the increase of the PCM volume from 4.5 m3 to 9 m3 shows moderate effects in all simulation runs, an increase of the collector area has substantial effects on the share of solar heat on the total energy demand of the building.

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