PhD Research Work On Concentrating Solar System with Heat Storage - - PowerPoint PPT Presentation

PhD Research Work On Concentrating Solar System with Heat Storage for Small Scale application

Asfafaw Haileselassie Energy and Process Engineering, NTNU Asfafaw.haileselassie@ntnu.no EnPe Annual Meeting Maputo , May 2nd -3rd, 2012

Content

Introduction The PhD Research PhD work Status to date and Challenges Conclussion

Introduction

• This PhD study is part of the ongoing EnPe project between

NTNU and Mekelle University (MU).

• This work is somehow a continuation of NTNU and MU’s

research on solar energy applications.

• Recent researches show that cooking and baking energy supply

needs an optional solution in Ethiopia to ensure environmental safety.

85% 15%

N.B

The rural people are looking for a chip energy supply for baking.

The PhD Research

Objective

• 1. Design and Construction of robust

concentrating solar system

• 2. Study of high temperature heat storage for

small scale solar thermal applications

• 3. study feasible HTF to
• Charge and discharge storage
• Charge application
• 4. Test the performance of the system

• The PhD study limited to:
• A two Axis tracking parabolic dish collector
• A fixed receiver
• Water (steam) HTF
• A solar salt (60% NaNO3 and 40% KNO3) heat storage

and

• A backing Injera stove will be constructed, tested and

determined the efficiency

Scope of the PhD Research?

Methodology

• 1. Concentrator modeling and optimization
• Ray tracer will be used as optimizing tool
• 2. Thermal modeling and simulation
• COMSOL Multiphysics modeling will be used for

modeling and simulation

• 3. Laboratory setup
• Developing working prototype
• Scientific Measurement and test compilation

Table 1: Work plan/work schedule of PhD study

PhD status to date

• The Research has gone with a year since its

kick off and do the following in this period.

– Took some course work and – Literature review – Develop the PhD plan – Start building a system

• Mekelle

• Opportunities

– Building the setup creates an opportunity for EnPe master students to work their thesis on:

• Steam as HTF
• PCM storage
• Challenges in Mekelle

– Material constraint

• Stainless steel
• Measuring instruments
• Solar salt
• Reflecting film
• Material procurement mainly with supplier and custom

• NTNU

• In the up coming summer

– Charging storage artificially/real sun – Charging application by steam real/artificially – discharging storage and charging application

• Challenges

– Shortage of man power in the laboratory – Crazy weather to do real sun test

Conclusions and recommendations

• In the first stage of the study, it is good if it focuses

at a certain institutions (hospitals, universities, hotels, or Injera bakeries)

• The system should be Safe and robust that can be
• perated by any layman
• It is highly recommended the laboratory set up

developed at NTNU should be accompanied by a full scale prototype in Mekelle for demonstration.

• Priming the solar salt by solar energy should be

tested at Mekelle.