An error occurred while processing the template. 
The following has evaluated to null or missing:
==> link_to_page.getData()?eval.name  [in template "20155#20195#RIBBON" at line 15, column 45]

----
Tip: It's the step after the last dot that caused this error, not those before it.
----
Tip: If the failing expression is known to legally refer to something that's sometimes null or missing, either specify a default value like myOptionalVar!myDefault, or use <#if myOptionalVar??>when-present<#else>when-missing</#if>. (These only cover the last step of the expression; to cover the whole expression, use parenthesis: (myOptionalVar.foo)!myDefault, (myOptionalVar.foo)??
----

----
FTL stack trace ("~" means nesting-related):
	- Failed at: #assign linkLabel = 'aria-label="' + ...  [in template "20155#20195#RIBBON" at line 15, column 9]
----
1<#assign contentId = .vars['reserved-article-id'].data > 
2<#assign ribbonClass = "ribbon${contentId}" > 
3<#assign bgColor = '' > 
4<#assign ribbonImage = image.getData() > 
5 
6<#assign layout = themeDisplay.getLayout()> 
7<#assign bgColor = getFieldValueFromLayoutTree(layout, "bgColor")> 
8<#assign linkLabel = ''> 
9 
10<#if validator.isBlank(ribbonImage)> 
11    <#assign ribbonImageUrl = '' > 
12<#else> 
13    <#assign ribbonImageUrl = link_to_page.getFriendlyUrl() > 
14    <#if link_to_page.getData()?has_content> 
15        <#assign linkLabel = 'aria-label="'+link_to_page.getData()?eval.name?replace('"','&quot;') + '"'> 
16    </#if> 
17</#if> 
18 
19<#if validator.isBlank(ribbonImage) > 
20    <#assign ribbonImage = getFieldValueFromLayoutTree(layout, "ribbonImage") > 
21 
22    <#if ribbonImage?has_content> 
23        <#assign ribbonImageUrl = getFieldValueFromLayoutTree(layout, "ribbonImageUrl") > 
24    </#if> 
25</#if> 
26<#if (parentStructureFieldSet20570.sourceFieldSet.source.getData())?has_content> 
27	<#assign source = parentStructureFieldSet20570.sourceFieldSet/> 
28	<#assign poster = parentStructureFieldSet20570.poster /> 
29	<#assign hideControls = parentStructureFieldSet20570.hideControls /> 
30</#if> 
31 
32 
33 
34 
35<style> 
36 
37    .${ribbonClass} .ribbon-content { 
38        aspect-ratio: 1170/${height.getData()}; 
39        background-image: url('${ribbonImage}'); 
40    } 
41 
42</style> 
43 
44<div class="hidden-phone ${ribbonClass} empa-background-color ${bgColor}"> 
45    <div class="container-xl"> 
46 
47        <#if !validator.isBlank(ribbonImageUrl)> 
48    <a href="${ribbonImageUrl}" ${linkLabel} 
49    <#else> 
50        <div 
51                </#if> 
52 
53                class="ribbon-content"> 
54            <#if source??> 
55                <#include "${templatesPath}/VIDEO-GENERIC" /> 
56            <#else> 
57                <div class="ribbon-overlay-text"> 
58                    ${overlay_text.getData()} 
59                </div> 
60            </#if> 
61 
62            <#if !validator.isBlank(ribbonImageUrl)> 
63            </a> 
64            <#else> 
65        </div> 
66        </#if> 
67    </div> 
68 
69</div> 
70 
71<#function getFieldValueFromLayoutTree layout fieldName> 
72     
73    <#attempt> 
74        <#local expandoValue = layout.getExpandoBridge().getAttribute(fieldName) /> 
75 
76        <#if (!(expandoValue?has_content) && !layout.isRootLayout())> 
77            <#return getFieldValueFromLayoutTree(layout.getAncestors()[0], fieldName)> 
78        </#if> 
79 
80        <#if expandoValue?has_content> 
81            <#return expandoValue[0]!""> 
82        <#else> 
83            <#return "" /> 
84        </#if> 
85    <#recover> 
86        <#return "" /> 
87    </#attempt> 
88 
89</#function> 

Urban Energy Systems

The Urban Energy Systems Laboratory focusses on the development of methods, strategies and solutions to transform buildings, neighbourhoods and cities into energy efficient and decarbonized systems. With our research we seek for solutions that significantly contribute in reaching national and global emission targets. Our core competences lie in the modelling, design and assessment of building and urban systems with focus on energy hubs, multi-energy grids, and integration of renewable energy and storage systems.

Our strategy is:

  • to develop innovative building energy systems and technologies,
  • to design relevant numerical models and analysis techniques for assessing the optimal integration, design and operation of multi-energy systems from building to district and higher scales, and
  • to test and implement the developed strategies through demonstration in close collaboration with research and industry partners.
UES+Start+880.jpg

Dr. Georgios Mavromatidis

Phone: +41 58 765 4299

Philipp Heer
Deputy Head of Lab

Group Leader ehub

Phone: +41 58 765 4990

Monika Jenny
Assistant

Phone: +41 58 765 4376

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