If I have a system that has both a hydrogen load and an electric load that is met, Homer calculates a COE, which is my cost of electricity. What is the price of the hydrogen produced in that system? Is it free, with all of the system costs included in the cost of electricity, or is accounted for in some way? HOMER's main economic outputs are the

Do you know what are the parameters ELYup, ELYlow, FCup, and FClow which are the SOC of the electrolyzer at which the fuel cell and the electrolyzer switch ON and OFF in HOMER? HOMER uses no such set points. The electrolyzer operates whenever the surplus electricity exceeds its minimum load point and there is headroom in the hydrogen storage tank

I am wondering that if the 100% efficiency of the electrolyzer indicates the theoretical maximum efficiency an electrolyzer can achieve because, assuming the hydrogen load is in kg/day not kWh/day, the energy content in the produced hydrogen under 100% efficiency seems to be lowe r than the energy input, so I would like to know if any necessary ene

I am running a model with Hydrogen load with no tank (I just put 0 kg in the tank size space) and want to know why electrolyzer produces more hydrogen than the load? Good question about excess hydrogen production. HOMER chooses to put all surplus electricity through the electrolyzer, even if that leads to excess hydrogen production.

Is there any chance of being able to use Hydrogen as a heating fuel directly, ie in an instantaeneous water heater or similar? We have a heating value for it resumably and it should be easy enough to plug into being able to use it in the boiler operation mimicking the instant water heater for a thermal load. Good question about fueling the boi

I couldn't understand the control strategy involved in charging the battary. I am using H2 storage + battaries. In a system that includes both a battery bank and a hydrogen storage tank, HOMER assumes that charging the battery bank always takes precedence over filling the hydrogen tank. That's because the round-trip efficiency for a hydrogen s

I am trying to use Homer to do some hydrogen analysis. I'd like to run a scenario where I determine the cost of hydrogen produced using wind and different grid price mixtures. However, currently I have a wind/electrolyzer/hydrogen tank/hydrogen load system set up, and Homer does not provide a cost of hydrogen. Is this outside the scope of the to

Any plans for energy storage in the form of hydrogen? HOMER can model hydrogen-based electrical storage, whereby an electrolyzer produces hydrogen from electricity when electrical supply exceeds demand, a tank stores the hydrogen, and a hydrogen-fueled generator converts the stored hydrogen back to electricity when electrical demand exceeds sup

It is possible to model a hydrogen storage system in HOMER Pro. The hydrogen storage system (electrolyzer, hydrogen storage tank, and fuel cell or hydrogen-fueled internal combustion engine) can replace or supplement a battery bank. To model these, you'll need the Hydrogen module in HOMER Pro.

For the electrolyzer to operate, there must be some demand for the hydrogen it produces. That requires an electric load, but also a hydrogen-fueled generator. For example, if the system contains a fuel cell fueled by stored hydrogen (and did not contain a battery) the fuel cell would operate and consume hydrogen whenever the electric load exceede

Can you tell me how does homer calculate the COH - Cost of Hydrogen? I searched in the index but i could only find COE - Cost of Energy. HOMER uses the following equation to calculate the levelized cost of hydrogen: Where Cann,tot is the total annualized cost, velec is the value of electricity (you enter that in the Hydrogen Load Inputs wind

Regarding the Hydrogen solution, the limitation of an annual consumption is not possible. The challenge lies in the right-sizing of the bottle capacity in order to do a trade-off of storage cost vs dispatch cost (vs electrolizer). I am not sure I see the problem. In a system that generates its own hydrogen by electrolysis, sizing the hydrogen

How does HOMER calculate the production of H2 in the electrolyzer model? HOMER models the electrolyzer in a very simple way. It assumes a constant efficiency, so that a certain amount of electricity will always result in a certain amount of hydrogen. It has a minimum load level, so if the electrolyzer can only operate down to, say, 75% of its

So, if HOMER actually takes the amount of hydrogen produced into consideration (I doubt this is the case) depending on the % of rated power, then I would say you could go all the way down to 10 or 15% for the min load ratio. HOMER assumes a constant efficiency, but not a constant output, if that's what you mean. So it assumes an electrolyzer r

I am trying to simulate a hydrogen storage system and so I need to simulate the compressor for compressing the hydrogen. Can homer simulate that? HOMER does not explicitly model the hydrogen compressor, but if your system contains an electrolyzer you can factor the compressor's electrical consumption into the efficiency of the electrolyzer.

What is "add noise" also on the hydrogen load screen? I'm using the same window for the hydrogen load that we use for the primary electrical load and the thermal load. In all cases, to synthesize an hourly data set you define one or more daily load profiles and then specify how much "noise" or randomness you want HOMER to add to those load pro