[LDES-technology] Questions for the technology team

[Rui Shan]

 Hi Martin, 

Thank you for the questions. Sorry for not discussing it during the meeting due to my computer issues. Here are some personal thoughts.

Q1. For some of the technologies, like the thermal storage, the response time (not sure how you define it, hot or cold?) should be the same as the natural gas combustion turbine and they will also be constrained by the minimum up/down time. 
Q2. Similarly, the thermal ones should align with the assumption as natural gas ones, for example 9% capacity per minutes. I am confused about how you calculate the fraction of technologies….
Q3. The ramp rate would be better to describe as the percentage of the project power capacity rating.

Hope it contribute a little. 

Best,
Rui Shan
> On Feb 12, 2021, at 6:15 AM, Martin Staadecker <machstg at gmail.com> wrote:
> 
> Hello everyone,
> 
> Here are the questions we're hoping to get some answers on tomorrow!
> What is the expected range of values for response time of storage technologies? We're especially interested in knowing what fraction of technologies have a response time of under an hour. (One hour is the length of one time step in our model so modelling response times for more or less than an hour is different. Ideally all the technologies fall on one side of the 1 hour mark.)
> Similarly, what's the expected range of values for ramp up and down rates (for both charging and discharging)? What fraction of technologies can reach maximum charging or discharging in under an hour?
> What's the best way to specify the ramp up and down rates for charging and discharging? As x MW per hour or as x percent of the project's total capacity per hour? In other words, is the ramp rate proportional to the capacity or fixed for a given project?
> Looking forward to meeting everyone!
> 
> Martin
> 
> 
> On Thu, 11 Feb 2021 at 17:04, Patricia Hidalgo-Gonzalez <phidalgogonzalez at eng.ucsd.edu> wrote:
>> Dear all,
>> 
>> Martin has been working with me to model long duration storage techs in switch. We had a few questions to make sure we are capturing the key aspects, and not overcomplicating others.
>> 
>> Martin will reply to all with the questions.
>> 
>> Thank you, Martin and all. We look forward to discussing tomorrow.
>> 
>> Best,
>> Paty
>> 
>> Patricia Hidalgo-Gonzalez 
>> Assistant Professor, Mechanical and Aerospace Engineering
>> Director, Renewable Energy + Advanced Mathematics Laboratory
>> University of California San Diego
>> REAM Lab website
>> (Pronouns: She/Her/Hers)
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