ISES Solar World Congress 2019 Paper: “Analysis of a solar hybrid cooling system for industrial applications”

Title: Analysis of a solar hybrid cooling system for industrial applications

Language: English

Authors: Uli Jakob (*1) and Falko Kiedaisch (*1)

*1: Dr. Jakob energy research GmbH & Co. KG (JER), Pestalozzistr. 3, 71384 Weinstadt (Germany)

Abstract: This paper presents the analysis of a new Fresnel solar thermal collector (FCSP) system with a Hybrid Heat Pump (HHP) for solar cooling purposes in industry using TRNSYS simulation. The HHP is a combination of a thermally driven adsorption chiller and electric compression chiller in a cascaded configuration, to achieve highly increased Energy Efficiency Ratios (EER) for the operation of the solar assisted HHP system. The benefits of the solar assisted HHP system is mainly based on constantly low heat rejection temperature of the compression chiller, compared to conventional ambient heat rejection systems, as the adsorption chiller is responsible for the heat rejection of the entire hybrid cooling system. The evaluation of a demo case in Barcelona, Spain showed, that EERs between 7-8 can be reached, hence, the electric power consumption of the cooling system can be reduced by 29 % in transitional seasons and by 44 % during summer. As a result of this approach, it is determined that full load operation conditions of minimum 3,800 h and ambient heat rejection
conditions with above 20°C have to occur constantly through operation period, to enable an overall economic operation of the solar assisted HHP System. As an example, for the investigated industry process in Barcelona specific cooling costs of 0.031 EUR/kWh can be reached at operating hours of 4,748 h/a. Moreover, it was analysed that the solar assisted HHP system is likely feasible for the implementation into industrial process typologies with both, heat and cold demands.

Hycool’s 3rd General Assembly in Rimini

Rimini, a beautiful Italian city on the Adriatic coast served as the center of operations for the third meeting of the Hycool consortium, celebrated between November 5th and 6th. This location was chosen to also boost the project’s dissemination activities at the Ecomondo fair, especially under the KeyEnergy section; one of the two main exhibition events on renewable energy and energy efficiency in Italy. 

 

 

During the meeting, technical advances regarding the installations that will be made at the pilot sites were discussed. Those advances concerned the choice of the absorber material, the monitoring of the material’s degradation, as well as the integration of the system CSP including energy management tools. The consortium also discussed the system integration for the high-performance solar heat pump components. Decisions were also made regarding the demonstration activities to be made in the future.