Investigating the Effect of Changing Ratios and Flowrates on Photovoltaic Thermal and Evacuated Tube Collector Array Performance for Different Building Types

Array Performance ◽

Photovoltaic thermal and/or evacuated tube collectors on building roofs can be effectively used to reduce fossil fuel use for heating and reliance on the electrical grid. To evaluate the potential of this reduction, a set of models were created for rooftop photovoltaic thermal and evacuated tube collector energy production, both thermal and electricity, and tested using a series of potential layouts. Five collector area ratios, two layout options, and three working fluid flowrates were investigated using five reference buildings as case studies. From these case studies it was determined that in Toronto’s climate, the exclusive use of photovoltaic thermal collectors produces the most total energy, while using only evacuated tube collectors maximally offsets greenhouse gasses. The results suggest that district heating would be highly effective to reduce the carbon footprint of city cores like the Toronto 2030 District.

Evaluating the Performance of Two Solar Domestic Hot Water Systems of the Archetype Sustainable Houses

10.32920/ryerson.14646924.v1 ◽

2021 ◽

Author(s):

Kamyar Tanha

Keyword(s):

Flat Plate ◽

Hot Water ◽

Experimental Results ◽

Solar Thermal ◽

Energy Output ◽

Solar Thermal Collector ◽

Solar Thermal Collectors ◽

This thesis is focused on the performance of the two SDHW systems of the sustainable Archetype houses in Vaughan, Ontario with daily hot water consumption of 225 litres. The first system consists of a flat plate solar thermal collector in conjunction with a gas boiler and a DWHR. The second SDHW system consists of an evacuated tube collector, an electric tank and a DWHR. The experimental results showed that the DWHRs were capable of an annual heat recovery of 789 kWh. The flat plate and evacuated tube collectors had an annual thermal energy output of 2038 kWh and 1383 kWh. The systems were also modeled in TRNSYS and validated with the experimental results. The simulated results showed that Edmonton has the highest annual energy consumption of 3763.4 kWh and 2852.9 kWh by gas boiler and electric tank and that the solar thermal collectors and DWHRs are most beneficial in Edmonton.

Thermal Heat Storage Gain of Salinity Gradient Solar Pond Using Evacuated Tube Solar Collectors

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1113.800 ◽

2015 ◽

Vol 1113 ◽

pp. 800-805 ◽

Cited By ~ 1

Author(s):

Baljit Singh ◽

Muhammad Fairuz Remeli ◽

Alex Pedemont ◽

Amandeep Oberoi ◽

Abhijit Date ◽

...

Keyword(s):

Large Scale ◽

Heat Storage ◽

Salinity Gradient ◽

Heat Energy ◽

Working Fluid ◽

The Sun ◽

Solar Ponds ◽

Solar Pond ◽

This paper investigates the capability of running a system which uses hot fluid from solar evacuated tube collectors to boost the temperature and overall heat storage of the solar pond. The system is circulated by a solar powered pump, producing heat energy entirely from the incoming solar radiation from the sun. Solar evacuated tube collectors use a renewable source of power directly from the sun to heat the working fluid to very high temperatures. Solar ponds are emerging on the renewable energy scene with the capacity to provide a simple and inexpensive thermal storage for the production of heat on a large scale. The results of the performance of the system show a significant heat energy increase into the solar ponds lower convective region, increasing the overall performance of the solar pond.

Performance Analysis of Solar Evacuated Tube Collector

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.712-715.1605 ◽

2013 ◽

Vol 712-715 ◽

pp. 1605-1608

Author(s):

Wen Bo Fang

Keyword(s):

Heat Loss ◽

Industrial Process ◽

Radiant Heat ◽

Solar Thermal Collectors ◽

Process Heating ◽

And Performance ◽

Evacuated Tube ◽

High Temperature Operation

The high temperature operation of Evacuated Tube Collectors (ETC) and their very low radiant heat losses make them ideal for solar water heating, solar space heating, desiccant air conditioning, thermal driven cooling and industrial process heating applications. The work temperature of common ETC can reach 100~ 250°C. The vacuum tube envelope minimizes heat loss and ensures high collector durability and steady performance. This paper investigates different types of solar thermal collectors and compared them so that the result which the heat loss of ETC is least is obtained. The thermal analysis and performance of ETC are investigated as well.

Investigation of Evacuated Tube Collector Performance at High Temperature Mode Using TRNSYS Simulation Model

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.465-466.155 ◽

2013 ◽

Vol 465-466 ◽

pp. 155-160

Author(s):

Basil H. Ali ◽

S.I. Gilani ◽

Hussain Hamoud Al-Kayiem

Keyword(s):

Simulation Model ◽

Substantial Improvement ◽

High Concentration ◽

Temperature Mode ◽

Collector Efficiency ◽

Good Improvement ◽

Evacuated Tube ◽

Different Levels

It has been proved that creation of vacuum between the absorber and the cover of a solar collector is resulting in a substantial improvement in the collector efficiency due to reduction in the heat loss through convection ad conduction. In this work, the performance of evacuated tube collectors is investigated using TRNSYS simulation model. Different levels of concentrations have been considered in the simulation to predict the power generation. The simulation results showed that the thermal performance of evacuated tube collectors with high concentration ratio can provide a good improvement to the receiver output.

Thermo-Economic Evaluation of Aqua-Ammonia Solar Absorption Air Conditioning System Integrated with Various Collector Types

Entropy ◽

10.3390/e22101165 ◽

2020 ◽

Vol 22 (10) ◽

pp. 1165

Author(s):

Adil Al-Falahi ◽

Falah Alobaid ◽

Bernd Epple

Keyword(s):

Coefficient Of Performance ◽

Critical Parameters ◽

Working Fluid ◽

Solar Absorption ◽

Air Conditioning System ◽

Absorption Cooling ◽

Solar Absorption Cooling ◽

Sports Arena ◽

The main objective of this paper is to simulate solar absorption cooling systems that use ammonia mixture as a working fluid to produce cooling. In this study, we have considered different configurations based on the ammonia–water (NH3–H2O) cooling cycle depending on the solar thermal technology: Evacuated tube collectors (ETC) and parabolic trough (PTC) solar collectors. To compare the configurations we have performed the energy, exergy, and economic analysis. The effect of heat source temperature on the critical parameters such as coefficient of performance (COP) and exegetic efficiency has been investigated for each configuration. Furthermore, the required optimum area and associated cost for each collector type have been determined. The methodology is applied in a specific case study for a sports arena with a 700~800 kW total cooling load. Results reveal that (PTC/NH3-H2O)configuration gives lower design aspects and minimum rates of hourly costs (USD 11.3/h) while (ETC/NH3-H2O) configuration (USD 12.16/h). (ETC/NH3-H2O) gives lower thermo-economic product cost (USD 0.14/GJ). The cycle coefficient of performance (COP) (of 0.5).

Evaluating the Performance of Two Solar Domestic Hot Water Systems of the Archetype Sustainable Houses

10.32920/ryerson.14646924 ◽

2021 ◽

Author(s):

Kamyar Tanha

Keyword(s):

Flat Plate ◽

Hot Water ◽

Experimental Results ◽

Solar Thermal ◽

Energy Output ◽

Solar Thermal Collector ◽

Solar Thermal Collectors ◽

This thesis is focused on the performance of the two SDHW systems of the sustainable Archetype houses in Vaughan, Ontario with daily hot water consumption of 225 litres. The first system consists of a flat plate solar thermal collector in conjunction with a gas boiler and a DWHR. The second SDHW system consists of an evacuated tube collector, an electric tank and a DWHR. The experimental results showed that the DWHRs were capable of an annual heat recovery of 789 kWh. The flat plate and evacuated tube collectors had an annual thermal energy output of 2038 kWh and 1383 kWh. The systems were also modeled in TRNSYS and validated with the experimental results. The simulated results showed that Edmonton has the highest annual energy consumption of 3763.4 kWh and 2852.9 kWh by gas boiler and electric tank and that the solar thermal collectors and DWHRs are most beneficial in Edmonton.