JesseJenkins Profile picture
Macro-energy systems engineering, optimization, and policy w/a focus on electricity. Prof @EPrinceton (MAE) & @AndlingerCenter. PI of ZERO Lab. Personal account
Sep 21, 2018 39 tweets 13 min read
A new OECD report finds carbon pricing policies are spreading worldwide, but are almost uniformly too low to fully capture damages caused by CO2 or drive needed emissions declines. Here's a thread on why carbon pricing falls short and what we might do about it… Using a social cost of carbon -- the estimate of societal damage caused by one ton of CO2 -- of €30/ton, the OECD finds that almost 90% of total global CO2 emissions are priced at a level below the damages they cause. About 55% of global emissions are not priced at all.
Sep 11, 2018 12 tweets 4 min read
Important memo to journalists & others reporting on passage of #SB100, California's clean electricity law signed by Gov. Brown yesterday.

What law does: requires 100% of CA electricity sales supplied by "eligible renewable energy resources and zero-carbon resources" by 2045. What the law does *not* require:
(a) 100% renewable electricity (it specifies renewables AND "zero-carbon resources")
(b) elimination of fossil fuels from electricity (it requires carbon-free, not no fossil)
(c) 100% clean *energy* (the law is about electricity, not all energy)
Sep 6, 2018 52 tweets 22 min read
With legislation committing California to 100% carbon-free electricity sitting on Gov. Brown’s desk, I wanted to share a timely new peer-reviewed article out today in the journal, @Joule_CP:… In the paper, @nsepulvedam, @FdeSisternes, Prof. Richard Lester and I use detailed power system modeling to identify strategies that lower the costs and increase the odds of reaching a zero-carbon electricity grid. Check out MIT News coverage of the paper:…
Apr 26, 2018 14 tweets 4 min read
Everything in this thread by @jacob_mays is correct (and also calmy and clearly articulated). Contrary to @ShellenbergerMD's thesis, there are no physical reasons why wind or solar power must increase electricity costs. Michael's first (of two controversial) posts on renewables driving up electricity costs… contains several grains of truth (eg the declining value of wind/solar as they scale) but it doesn't connect the right dots either.
Apr 25, 2018 32 tweets 10 min read
THREAD: There’s a commonly held view that nuclear power and wind & solar mix like oil and water. Inflexible, always-on nuclear, the idea goes, is ill-suited for a world where wind and solar output vary on timescales ranging from seconds to hours to seasons. 1/ In reality, while nuclear plants traditionally provide steady output 24-7, reactors are technically capable of much greater flexibility and can dynamically adjust their power output to respond to changing electricity prices and second-to-second frequency regulation needs. 2/
Apr 13, 2018 14 tweets 5 min read
Good questions @RedsforNamesake. If confronting #climate change is your priority, it is imperative to ramp up carbon-free energy asap.

1. NJ will now ramp up renewable energy from 13% in 2017 and 20% by 2020 under old RPS to 35% by 2025 & 50% by 2030. Impressive leadership. 2. To ensure that this new clean energy replaces fossil fuels and contributes to #climate mitigation goals, NJ's new laws also make payments to ensure the continued operation of 3 South Jersey nuclear reactors that currently supply 31% of the state's electricity consumption.
Mar 5, 2018 28 tweets 9 min read
I was about to head offline for 2 weeks, but I need to respond to this new paper from @ppchef before I go on whether #nuclear can operate flexibly. By coincidence, I just had a peer-reviewed article on this very subject accepted by Applied Energy by today! So here's a thread... In this new "discussion paper," energy journalist @PPchef takes great pains to demonstrate that nuclear power is too inflexible to pair well with wind & solar in a "decarbonized energy system" & thus must be discarded "to make room" for more #wind & #solar…
Feb 8, 2018 23 tweets 12 min read
Im seeing more discussion on possibility of using (smaller) #nuclear reactors to generate heat (instead of electricity) to eventually help decarbonize district heating (& cooling via evap. chillers), industrial process heat, etc. I've wondered: what are the economics? #thread 👇 Heat is much less valuable then electricity. Then again, a nuclear plant is a great heater! Only about 33% of heat generated by a reactor is converted to electricity. So would it be worth it to produce heat instead of power?
Jan 26, 2018 13 tweets 4 min read
This shit drives me so nuts.

Friends, here is @MassSierraClub...

1. Says "Climate change is an existential threat facing humanity and many other species."…

(It is) 2. Calls for Pilgrim #nuclear plant near Plymouth MA to be "shut immediately" because planned 2019 closures isn't soon enough.…

Would immediately result in loss of 1 of New England's largest sources of CO2-free power & 4.2% of region's annual electricity.
Jan 9, 2018 34 tweets 18 min read
Six #nuclear reactors closed since 2013. By my count, up to 23 more reactors may retire w/o policy or market conditions improving: 21.6 GW = ~1/5th of US fleet, 4% of US #electricity--and crucially, 12% of emissions-free generation.

So what's killing nuclear power in the U.S.? In a new @MIT CEEPR paper -- 1 part #energy #economics & 1 part film noir murder mystery! -- I provide the 1st empirical estimates of what's driving down #electricity market prices & killing profitability of 19 #nuclear power plants across @pjminterconnect…