WSEAS Transactions on Heat and Mass Transfer
Print ISSN: 1790-5044, E-ISSN: 2224-3461
Volume 14, 2019
Borehole Thermal Energy Storage for Industrial Heat Waste
Authors: , ,
Abstract: Analysis of the heat waste recovery consists of evaluation of the borehole thermal energy storage capacity to inject and extract heat energy. The establishment of Vaasa Energy Business and Innovation Center (VEBIC) platform in Finland, is to promote energy business in the country, was chosen as a test building to study the energy storage. One of the feature of the platform is to test diesel engine technology for marine industry. During the operation of these engines, ultra-exhaustion heat is produced which may be stored in a borehole thermal energy storage (BTES). This study investigates heat waste recovery operation to find optimal parameters for the BTES. There are five examples made to estimate an appropriate size of the storage with respect to the given heat waste signal. The configuration consist of nine boreholes with varying depth and the borehole to borehole distances. Results showed that the storage with a depth of 250 meters has the most stable response and it was suitable for the given system. Heat transfer in the selected storage is calculated by varying the volumetric flow rate. Optimal flow rate for the selected system was found to be 1.5 liter per second. A case study is proposed for extraction of the heat energy with a heat pump. The required heating demand of the test building is estimated to be met with a series connection of four boreholes from the charged BTES.
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Keywords: Industrial heat waste recovery, Borehole thermal energy storage, Heat extraction, Heat injection, Comsol modeling
Pages: 120-128
WSEAS Transactions on Heat and Mass Transfer, ISSN / E-ISSN: 1790-5044 / 2224-3461, Volume 14, 2019, Art. #15