Study of effective solar energy storage using a double pipe geothermal heat exchanger

Abstract

a b s t r a c tA reliable transient heat transfer model is used to ascertain the effect of solar thermal energy storage on a geothermal system. The proposed closed loop system is comprised of a double pipe heat exchanger, and is supplied with solar thermal energy during the summer months. The numerical simulations are based on cases that are common in northern climates (e.g. Canada). A conduction-advection based model is used to simulate heat transfer in the ground and in the heat exchange pipes for both heat extraction and heat injection scenarios. The constant power configuration is employed to accurately assess the effects of injecting thermal energy into a geothermal resource. The mass flow rate through the heat exchanger and the solar energy input are varied during summer cycles to investigate the influence on the uptake of thermal energy into the geothermal resource. The effects of rate of heat extraction and injection on the techno-economic performance of geothermal energy production have been investigated.

Heat Transfer Enhancement in Tubular Heat Exchanger with Jet Impingement: A Review

“…Tubular HEs have recently been employed in solar and geothermal applications as well. Using the computational finite volume approach, Templeton et al, [12] studied tubular HEs for solar energy storage. The simulation was based on recent samples from countries with cold temperatures, such as Canada.…”

Heat Transfer Enhancement in Parallel Flow Double Pipe Heat Exchanger using Aluminum Oxide and Copper Oxide Nanofluids

“…Previous research has utilized a double-pipe heat exchanger to increase heat transfer rates (Goodarzi et al, 2016;Hashemian et al, 2016;Shakiba & Vahedi, 2016;Templeton et al, 2016;Bahmani et al, 2018). For instance, one study examined the effectiveness of combining heat transfer with various working uids in a double-pipe heat exchanger and discovered a signi cant improvement in heat transfer rates when compared to a base uid without nanoparticles (Goodarzi et al, 2016).…”

Energy and exergy analysis of a bidirectional solar thermoelectric generator combining thermal energy storage

“…The thermal energy stored in solar thermal power plants has historically been used to supply the intermittency of daily and seasonal generation. Thermal energy can be stored in different media such as diffusive ground storage, inland storage, aquifers, phase change materials and water (Templeton et al, 2016). The thermal energy stored in solar thermal power plants has traditionally been used for domestic hot water (DHW) applications (Nordelland Hellström, 2000;Schmidt et al, 2004).…”

“…However, some limitations are observed when storing thermal energy generated in solar thermal power plants. Among them, significant limitations are the need to maintain the temperature of the working fluid high enough to ensure the efficiency of the system (Templeton et al, 2016); the heat losses in a high-temperature thermal energy storage (TES) system (Sibbitt et al, 2012); and the dependence of the storage system temperature with the variation of the ambient temperature (Chapuis and Bernier, 2009).…”