Warning (2): Invalid argument supplied for foreach() [APP/Controller/AppController.php, line 669]Code Context $count = $current = 0;
foreach ($array as $key => $value) {
//pr($key);
$array = null
$id = '1406'
$found = false
$next = false
$prev = false
$count = (int) 0
$current = (int) 0
App\Controller\AppController::getPrevNext() - APP/Controller/AppController.php, line 669
App\Controller\PublicationsController::view() - APP/Controller/PublicationsController.php, line 135
Cake\Controller\Controller::invokeAction() - CORE/src/Controller/Controller.php, line 606
Cake\Http\ActionDispatcher::_invoke() - CORE/src/Http/ActionDispatcher.php, line 120
Cake\Http\ActionDispatcher::dispatch() - CORE/src/Http/ActionDispatcher.php, line 94
Cake\Routing\Dispatcher::dispatch() - CORE/src/Routing/Dispatcher.php, line 66
Cake\Controller\Controller::requestAction() - CORE/src/Routing/RequestActionTrait.php, line 181
App\Controller\MenusController::actionRequest() - APP/Controller/MenusController.php, line 745
eval - APP/Controller/MenusController.php(326) : eval()'d code, line 1
App\Controller\MenusController::index() - APP/Controller/MenusController.php, line 326
Cake\Controller\Controller::invokeAction() - CORE/src/Controller/Controller.php, line 606
Cake\Http\ActionDispatcher::_invoke() - CORE/src/Http/ActionDispatcher.php, line 120
Cake\Http\ActionDispatcher::dispatch() - CORE/src/Http/ActionDispatcher.php, line 94
Cake\Routing\Dispatcher::dispatch() - CORE/src/Routing/Dispatcher.php, line 66
[main] - ROOT/webroot/index.php, line 43
Warning (2): count() [<a href='https://secure.php.net/function.count'>function.count</a>]: Parameter must be an array or an object that implements Countable [APP/Controller/AppController.php, line 689]Code Context }
$count = count($array);
$this->set(compact(['next', 'prev', 'current', 'count']));
$array = null
$id = '1406'
$found = false
$next = false
$prev = false
$count = (int) 0
$current = (int) 0
count - [internal], line ??
App\Controller\AppController::getPrevNext() - APP/Controller/AppController.php, line 689
App\Controller\PublicationsController::view() - APP/Controller/PublicationsController.php, line 135
Cake\Controller\Controller::invokeAction() - CORE/src/Controller/Controller.php, line 606
Cake\Http\ActionDispatcher::_invoke() - CORE/src/Http/ActionDispatcher.php, line 120
Cake\Http\ActionDispatcher::dispatch() - CORE/src/Http/ActionDispatcher.php, line 94
Cake\Routing\Dispatcher::dispatch() - CORE/src/Routing/Dispatcher.php, line 66
Cake\Controller\Controller::requestAction() - CORE/src/Routing/RequestActionTrait.php, line 181
App\Controller\MenusController::actionRequest() - APP/Controller/MenusController.php, line 745
eval - APP/Controller/MenusController.php(326) : eval()'d code, line 1
App\Controller\MenusController::index() - APP/Controller/MenusController.php, line 326
Cake\Controller\Controller::invokeAction() - CORE/src/Controller/Controller.php, line 606
Cake\Http\ActionDispatcher::_invoke() - CORE/src/Http/ActionDispatcher.php, line 120
Cake\Http\ActionDispatcher::dispatch() - CORE/src/Http/ActionDispatcher.php, line 94
Cake\Routing\Dispatcher::dispatch() - CORE/src/Routing/Dispatcher.php, line 66
[main] - ROOT/webroot/index.php, line 43
Conference Presentation | Conference presentations and posters | Potentiale, Bioenergiesysteme, Logistik
On efficient solar district heating systems – status and latest results
Viktor Unterberger (BEST, AUT) , Klaus Lichtenegger (BEST, AUT) , Magdalena Berberich (SOLITES, GER), Lukas Feierl (SOLID SES, AUT), Maria Moser (SOLID SES, AUT), Luuk Beurskens (TNO, NL),Joakim Byström (Absolicon, SWE), Carina Deutsch (BEST, AUT), Mark
Published 2024
Citation: Unterberger V, Lichtenegger K, Berberich M, Feierl L, Moser M, Beurskens L, Byström J, Deutsch C, Gölles M. On efficient solar district heating systems – status and latest results. IEA SHC Task 68 - Efficient Solar District Heating Systems. 3rd International Sustainable Energy Conference: ISEC 2024. Graz, 10-11/04/2024. Poster presentation.
Abstract
Heat is still the largest energy end-use, accounting for about 50% of global final energy consumption in 2022 and contributing to 40% of global carbon dioxide (CO2) emissions. Regarding the heat supply of buildings, district heating plays an important role and is well-established in many countries. However, most of the district heating networks worldwide are still operated with supply temperatures of 70-120°C (medium-high temperature) often produced by caloric power plants. Solar district heating (SDH) systems can be a valuable alternative to decarbonize these systems. How this can be done most efficiently is investigated within the task 68 Efficient Solar District Heating Systems of the International Energy Agency (IEA) from the technology cooperation program – solar heating and cooling (SHC). This contribution presents the latest results of the task regarding comparison of different collector technologies, important digitalization aspects, analysis of available funding schemes and latest efficient SHD installations.
Download PDF