{"action":"closed","issue":{"url":"https://api.github.com/repos/quintel/etengine/issues/799","labels_url":"https://api.github.com/repos/quintel/etengine/issues/799/labels{/name}","comments_url":"https://api.github.com/repos/quintel/etengine/issues/799/comments","events_url":"https://api.github.com/repos/quintel/etengine/issues/799/events","html_url":"https://github.com/quintel/etengine/issues/799","id":119448398,"number":799,"title":"Overflow feature needed for hybrid heat pump","user":{"login":"ChaelKruip","id":1303760,"avatar_url":"https://avatars.githubusercontent.com/u/1303760?v=3","gravatar_id":"","url":"https://api.github.com/users/ChaelKruip","html_url":"https://github.com/ChaelKruip","followers_url":"https://api.github.com/users/ChaelKruip/followers","following_url":"https://api.github.com/users/ChaelKruip/following{/other_user}","gists_url":"https://api.github.com/users/ChaelKruip/gists{/gist_id}","starred_url":"https://api.github.com/users/ChaelKruip/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/ChaelKruip/subscriptions","organizations_url":"https://api.github.com/users/ChaelKruip/orgs","repos_url":"https://api.github.com/users/ChaelKruip/repos","events_url":"https://api.github.com/users/ChaelKruip/events{/privacy}","received_events_url":"https://api.github.com/users/ChaelKruip/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/quintel/etengine/labels/New%20features","name":"New features","color":"e102d8"}],"state":"closed","locked":false,"assignee":{"login":"antw","id":4383,"avatar_url":"https://avatars.githubusercontent.com/u/4383?v=3","gravatar_id":"","url":"https://api.github.com/users/antw","html_url":"https://github.com/antw","followers_url":"https://api.github.com/users/antw/followers","following_url":"https://api.github.com/users/antw/following{/other_user}","gists_url":"https://api.github.com/users/antw/gists{/gist_id}","starred_url":"https://api.github.com/users/antw/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/antw/subscriptions","organizations_url":"https://api.github.com/users/antw/orgs","repos_url":"https://api.github.com/users/antw/repos","events_url":"https://api.github.com/users/antw/events{/privacy}","received_events_url":"https://api.github.com/users/antw/received_events","type":"User","site_admin":false},"milestone":{"url":"https://api.github.com/repos/quintel/etengine/milestones/35","html_url":"https://github.com/quintel/etengine/milestones/ETMoses%20(gas)%20sprint%202","labels_url":"https://api.github.com/repos/quintel/etengine/milestones/35/labels","id":1363549,"number":35,"title":"ETMoses (gas) sprint 2","description":"","creator":{"login":"ChaelKruip","id":1303760,"avatar_url":"https://avatars.githubusercontent.com/u/1303760?v=3","gravatar_id":"","url":"https://api.github.com/users/ChaelKruip","html_url":"https://github.com/ChaelKruip","followers_url":"https://api.github.com/users/ChaelKruip/followers","following_url":"https://api.github.com/users/ChaelKruip/following{/other_user}","gists_url":"https://api.github.com/users/ChaelKruip/gists{/gist_id}","starred_url":"https://api.github.com/users/ChaelKruip/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/ChaelKruip/subscriptions","organizations_url":"https://api.github.com/users/ChaelKruip/orgs","repos_url":"https://api.github.com/users/ChaelKruip/repos","events_url":"https://api.github.com/users/ChaelKruip/events{/privacy}","received_events_url":"https://api.github.com/users/ChaelKruip/received_events","type":"User","site_admin":false},"open_issues":0,"closed_issues":1,"state":"open","created_at":"2015-10-19T10:00:29Z","updated_at":"2015-11-30T12:52:45Z","due_on":"2015-12-06T23:00:00Z","closed_at":null},"comments":5,"created_at":"2015-11-30T09:11:56Z","updated_at":"2015-11-30T12:52:45Z","closed_at":"2015-11-30T12:52:45Z","body":"With the modeling of hybrid heat pumps as three nodes (see https://github.com/quintel/etengine/issues/791) we run into the following issue.\r\n\r\nThe combi-boiler part of the HHP is connected to both the collector and to the HP part as shown here:\r\n![](https://cloud.githubusercontent.com/assets/1303760/10788204/52dfaba6-7d76-11e5-8f66-9ffe6e0e0f0b.png)\r\n\r\nThe reason for this: when the HP part cannot fulfil its part of the demand anymore, the combi boiler should fulfil that demand. \r\n\r\nThe converters in the space heating and hot water section of the ETM are `demand driven` meaning that they scale their FLH to match the demand (keeping `number_of_units` and capacity fixed). Currently, the FLH can surpass their physical limit of 8760 hours per year without the ETM batting an eyelid. This means that the demand would never 'overflow' into the combi-boiler part of the HHP.\r\n\r\n@antw would it be possible to make demand 'flow over' when the FLH of a converter reach 8760?\r\nIf this is difficult, we might reconsider to model the HHP as one converter but this would require both the efficiency and the inputs of carriers to depend on the demand (which sounds like more work in ETE to me)."}}